In the term subungual sub is a

Subungual definition of subungual by Medical dictionar

  1. DLSO, distal lateral subungual onychomycosis; DS0, distal subungual onychomycosis. Onychomycosis: The Most Common Misdiagnosis in Nail Disease Our patient presented with hyperhidrosis in palms and soles of the feet, pointed pits in palmoplantar keratoderma areas, and subungual hyperkeratosis
  2. sub· un· gual | \ Medical Definition of subungual: situated or occurring under a fingernail or toenail a subungual abscess. Learn More About subungual. Share subungual. Post the Definition of subungual to Facebook Share the Definition of subungual on Twitter. Dictionary Entries Near subungual
  3. (20,21) These topical agents can be used in superficial or distal subungual onychomycosis, limited to less than 50% of the distal nail, if patients will adhere to the treatment for 1 year
  4. As an adjective subungual is (anatomy) under a toenail or fingernail
  5. If you break down the term, it's just Sub (underneath) - Ungual (nail) - Hematoma (collection of blood) Subungual Hematomas can be caused by any number of acute events: finger slammed in the door, thumb hit with a hammer, dumbbell dropped on a toe, etc
  6. istration are two different ways of giving medication by mouth. Sublingual ad
  7. Subungual melanoma is a type of longitudinal melanonychia, but what are the tipoffs that longitudinal melanonychia is malignant vs. benign? A brown or black band, stripe, streak or line in a nail is a very common occurrence in men and women of all ages and races

I've got a client with PVD, who has developed subungual breakdowns under both hallux nails, the first side has been present for 2-3 months, and the second only 2 weeks. I'm a bit puzzled as to how to proceed with this (eg. cutting back the nail or not; referring back to the vascular surgeon) Start studying Ch. 16 med term quiz. Learn vocabulary, terms, and more with flashcards, games, and other study tools

Subungual Medical Definition Merriam-Webster Medical

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Subungual melanoma, also referred to as cancer of the nail unit, is a type of malignancy that arises in the tissues of the nail bed. Melanoma is a type of cancer that develops in cells called melanocytes. Melanocytes are cells that produce melanin, the pigment that gives skin, hair, and eyes their color Subungual hematoma is the medical term for bleeding and bruising under the nail. This is usually the result of some kind of injury to the blood vessels under the nail bed. For example, blood.. Question 8 Identify the prefix in the term polyneuritis. Question 9 -osis is an example of a: Question 10 Identify the suffix in the term lumbalgia. Question 11 In the term subungual, sub- is a: Question 12 -ectomy is an example of a: Question 13 Identify the suffix in the term angiogram. Question 14 Identify the word root in the term nephrosis

A subungual hematoma is a collection of blood underneath a toenail or fingernail (black toenail). It can be extremely painful for an injury of its size, although otherwise it is not a serious medical condition. Nature. A laceration of the nail bed causes bleeding into the. The terms subungual refers to something that is underneath the nail on the toes or fingers. The term exostosis refers to an overgrowth of bone. This can also be called a bone tumor. The great majority of which are benign. So a subungual exostosis is an overgrowth of bone underneath the nail Background: Subungual melanoma typically presents as a darkened longitudinal stripe under the nail plate; however, this disease is frequently misdiagnosed, which leads to a delay in proper diagnosis. Subsequently, subungual melanoma historically has a relatively poor prognosis compared with other cutaneous melanomas, with the 5-year survival rate ranging between 16 and 80 percent

Subungual hematomas occur after an injury to a nail. An impact can break blood vessels, causing blood to pool underneath the nail. In this article, we look at how to treat a subungal hematoma at. Subungual melanoma is a certain known kind of melanoma that infects the skin under the nail bed, it is more commonly to be seen in dark-skinned people.To be more specific as a description, we should know that subungual melanoma causes dark colored stripes along the whole length of the nail plate. However, we have to keep in mind that having a dark nail stripe is not considered enough cause to.

A benign lesion that affects the distal phalanx, most often the great toe. Grossly it consists of a cartilage cap and a bony stalk. Microscopically it is characterized by an osteochondromatous proliferation with a gradual transition of a peripheral spindle-cell proliferation to hyaline cartilage to trabecular bone. Pain and swelling are present A subungual splinter may be removed by cutting out a V-shaped piece of the nail. The point of the V is at the proximal tip of the splinter, which is grasped and removed, taking particular care not. Have you heared about Subungual hematoma , It is the medical term for bleeding and bruising under the nail (brusied toenail) . This can be due to result of some injury to the blood. Learn to treat your bruised toenail correctly with this article. Bruising under the nail and bleeding is also known as subungual hematoma Definition of suburb in the Definitions.net dictionary. Meaning of suburb. What does suburb mean? Information and translations of suburb in the most comprehensive dictionary definitions resource on the web Definition of subungual word. adjective subungual of, pertaining to, bearing, or shaped like a nail, claw, or hoof. 1. Just one definition for subungual

Subungual hemorrhages, also called subungual haematomas, are collections of blood in the space between the nail bed ormatrix and the nail plate and may result from an acute injury or repetitive minor trauma to the nail apparatus. Their most frequent location are the thumb and the hallux. Most subungual hemorrhages are clinically evident with. An exostosis is a medical term referring to an abnormal bony growth on the surface of a bone. EX = out of, OST. (Osteon) = bone, OSIS = abnormal condition. Subungual exostosis refers to the abnormal bony projection formed on the bone present under the nail (distal phalanx) TERM DEFINITION Hyponychiu m Hyponychial means subungual Subungual Sub- means below or beneath. Ungual means pertaining to the fingernail. The hyponychium is the area where the nail body is attached just below the f edge. Keratin Kerat- means horny. Keratin is a fibrous protein that is the primary component of the epidermis, ha and nails. Lunula Luna- means moon

Subungual - definition of subungual by The Free Dictionar

  1. Subungual Acral Lentiginous Melanoma. It is a malignant melanoma which shows up on the hands, feet, and subungual sites. Another more specific term used for subungual melanoma. The meaning is lesions noted in hairless areas. Its signs/symptoms, diagnosis, and treatment are the same as those mentioned in this article
  2. Another type of fungal infection is called proximal subungual onychomycosis. It looks like a whitish or yellowish patch that starts at the base of the toenail, near the cuticle. The infection is.
  3. Definition of subunit in the Definitions.net dictionary. Meaning of subunit. What does subunit mean? Information and translations of subunit in the most comprehensive dictionary definitions resource on the web
  4. Keratoacanthoma (KA) is a common low-grade (unlikely to metastasize or invade) rapidly-growing skin tumour that is believed to originate from the hair follicle (pilosebaceous unit) and can resemble squamous cell carcinoma.. The defining characteristic of a keratoacanthoma is that it is dome-shaped, symmetrical, surrounded by a smooth wall of inflamed skin, and capped with keratin scales and.
  5. Longitudinal melanonychia is common in people of African descent but can also be caused by nail trauma or systemic disease. Other causes include nail infections and cancer. A rare form of melanonychia, called transverse melanonychia, is recognized by a darkened line that runs side to side along the nail plate
  6. The subungual corn is, from my experience , often caused by a hallux limitus or rigidus. The first metatarsal-phalangeal joint does not have adequate motion available in propusion, therefore the distal phalanx is forced to dorsiflex on the proximal phalanx. So, a subungual corn forms because of shoe pressure

Subungual haematoma causes pressure build up in a contained space with significant pain which can be immediately relieved by drainage. Drainage is indicated even if the haematoma is associated with an underlying phalanx fracture and nail bed laceration (open fracture) Subungal Hematoma. Kids love to explore their environment, but sometimes that environment (and their lack of agility and sluggish reflexes) leads to injuries. Fortunately, often these injuries are minor. Unfortunately, those minor injuries can lead to major headaches for you in your ED. One great example of that is the possible nail bed injury

Define subungual exostosis. subungual exostosis synonyms, subungual exostosis pronunciation, subungual exostosis translation, English dictionary definition of subungual exostosis. n. pl. ex·os·to·ses A bony growth on the surface of a bone or tooth Pertaining to under a nail: subungual _____ 3. Collection of fatty material in a cyst: steat oma 4. Pus within the skin: pyo derma 5. Very dry skin: ichthy osis 6. Nodules of lipid (yellowish) material develop under the skin: xanth oma 7. Excessive amount of hair growth hypertrich osis 8

Digestive problems such as heartburn are some of the rare side effects associated with B12 intake. The term 'sublingual' literally means below the tongue. So, when it comes to taking sublingual medications, there is absolutely no need to swallow these drugs. One has to simply keep the medication beneath the tongue and within minutes it. Clinical Relevance: Ranula. A ranula is a type of mucocele (mucous cyst) that occurs in the floor of the mouth inferior to the tongue. It is the most common disorder associated with the sublingual glands due to their higher mucin content in secretions compared to other salivary glands.. Ranulas can be caused by trauma to the delicate sublingual gland ducts causing them to rupture, with mucin. subungual hematoma: (sub-un-gw l he¯-ma-to¯-m ) n. a collection of blood underneath a toenail or fingernail. What It Is The word hematoma means pocket of blood. The term subungual means under the nail. Combined, the phrase refers to a pocket of blood trapped under a fingernail or toenail

Total dystrophic onychomycosis (TDO) refers to the most advanced form of all sub-types. TDO is a later severe stage of the chronic subungual dermatophyte infection that may take 10 to 15 years to develop. There is significant subungual hyperkeratosis and destruction of abnormal nail plate and ridging of the nail bed subungualem: Wortart: Deklinierte Form Silbentrennung: sub|un|gu|a|lem Aussprache/Betonung: IPA: [zʊpʔʊŋɡuˈaːləm] Grammatische Merkmale: Dativ Singular Maskulinum der starken Deklination des Positivs des Adjektivs subungual Dativ Singular Neutrum der starken Deklination des Positivs des Adjektivs subungual. subungualen: Merkmale: Genitiv Singular Maskulinum der starken Deklination. Find patient medical information for B12 sublingual on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings

Subungual hematoma drainage is indicated whenever it implies pain or concerns more than 50% of the nail, or more than 25% with an associated fracture (1). Studies have shown that trephination has the same efficacy as complete removal of the nail. If the subungual hematoma is associated with the complete avulsion of the nail, a displaced phalanx. Subungual hematomas are common nail bed injuries caused by blunt or sharp trauma to the fingers or toes. [1, 2] Bleeding from the rich vascular nail bed results in increased pressure under the nail and can cause significant discomfort. [] Subungual hematoma drainage, also known as nail bed trephination, can be performed to relieve this discomfort Many codes in Chapter 19 of ICD-10-CM (Injury, Poisoning, and Certain Other Consequences of External Causes (S00-T88)) require a 7th character to identify the episode of care: initial, subsequent, or sequela. With the exception of the fracture codes, most Chapter 19 codes have three 7th character values: A - Initial encounte

A subungual haematoma is a collection of blood beneath a finger or toe nail. It is often caused by a crush injury (Purcell, 2003) such as shutting a finger in a door or other types of trauma. Heim et al (2000) note that these haematomas can also be caused by repetitive trauma in athletes such as runners and dancers Keloids are raised scars that can appear after an injury. Learn more about the symptoms, causes, and treatment options available here Subungual melanoma is a type of acral melanoma. Early lesions may show widening pigmented bands, irregular in spacing and varying colour (including pink or red in amelanotic melanoma). A positive Hutchinson's sign refers to pigment arising on the skin adjacent to the nail, which is rare in benign naevi. Changes may be observed by dermoscopy. WATCH MORE VIDEOS FROM THIS EPISODE >. When is a bruise potentially something much more serious? Learn how to differentiate between a subungual hematoma and a subungual melanoma. Tweet

We finish the removal of a toenail partially separated from the nail bed by a subungual hematoma, or blood clot under the nail. The blood can be drained by. Nails of feet exhibited onychogryphosis, defined by subungual keratosis, opaque yellow-brown discolouration of the nail plate and twisted, hyperkeratotic nails resembling [casereports.bmj.com] Berger, Pruritus and Cutaneous Inflammatory Conditions in HIV Disease, Clinics in Dermatology, Vol. 18, No. 4, 2000, pp. 479-484. doi:10.1016. Subungual warts can be removed by freezing them with liquid nitrogen and burning them off with a cauterization tool or applying salicylic acid. If your doctor does not recommend removal, they may try to attack the cells by applying topical or injected medication. This type of treatment will cause an allergic reaction at the affected spot and.

Subunguinal vs Subungual - What's the difference? WikiDif

  1. g the door of a car or house door on a finger, dropping a heavy object such as dumbell on the toe, stubbing a toe on a hard surface and hitting a finger with a heavy object such as a hammer. it can result to infection of the bone called osteomyelitis that necessitates long-term IV.
  2. Glomus tumor. Glomus tumor is a rare soft-tissue benign neoplasm that arises from neuromyoarterial glomus cells in the arterial portion of the glomus body (an apparatus that involves in thermoregulation of cutaneous microvasculature) or the Sucquet-Hoyer canal 1).Glomus tumors most frequently occur in areas with high concentrations of glomus bodies, including subungual regions of the fingers.
  3. A subungual hematoma (sub-UNG-gwal HEE-muh-toe-muh) is blood trapped under a fingernail or toenail, often due to an injury such as a stubbed toe or a finger slammed in a door.. More to Know. A subungual hematoma is a common and painful injury. The injured area under the nail bleeds and, as a result, turns a blue-black color
  4. Definition. involves the placement of a suspected allergen in the uppermost layers of the epidermis. One technique used is to place a drop of the allergen on the skin of the forearm or back. Pass a sterile lancet or needle through the drop, and prick the skin no deeper than the uppermost layers of the epidermis
  5. Subungual Melanoma (SM) Subungual melanoma is a rare form that occurs under a nail and can affect the hands or the feet. It's more common in people with a darker skin pigment. The first indication of a subungual melanoma is usually a brown or black discoloration that's often mistaken for a bruise

Introduction: Subungual osteochondroma are benign tumors of the sub or periungual region, causing lift, ulceration and deformity at that level. Methods: Retrospective, descriptive, observational and transversal study, based on review of records with histopathological result of osteochondroma from 2001 to 2014. Results: Pathological assessment featured 4 osteochondromas corresponded to the. Malignant melanoma is a life threatening skin tumour which may arise on the foot. The prognosis for the condition is good when lesions are diagnosed and treated early. However, lesions arising on the soles and within the nail unit can be difficult to recognise leading to delays in diagnosis. These guidelines have been drafted to alert health care practitioners to the early signs of the disease.

Subungual amelanotic melanoma is rare. In addition, amelanotic melanoma can mimic non-melanocytic tumors. A 67-year-old woman had a four-year history of dystrophy of the left fourth fingernail. Periodic acid-Schiff staining of the nail plate demonstrated fungal hyphae, establishing a diagnosis of tinea unguium. The nail plate subsequently detached and the underlying nail bed showed a red. Subtweet definition, (on the Twitter website) a hostile or otherwise negative post that is addressed to or about a particular person but does not mention the person's username or does not name the person at all. See more Callosities (Corns) Definition. Corn: Corn is a small, painful, raised bump on the outer skin layer that is conical in shape with the tip pointing inwards and base formed by the outer skin. Calluses: Calluses are localized thickenings of the outer skin layer as a result of repeated friction. Pathologically, corns and calluses are the same Even though the term evacuation is not a root operation, it can be found in the alphabetical index as a main term. The sub-term Hematoma is listed under Evacuation followed by see Extirpation. At that point, we see the following entries: Extirpation. Breast. Right 0HC Subungual Melanoma What is Subungual Melanoma? Subungual melanoma is a certain known kind of melanoma that infects the skin under the nail bed, it is more commonly..

Subungual Hematoma - Combat Medicine 10

A subungual hematoma is a collection of blood (hematoma) underneath a toenail or Subungual hematomas typically heal without incident, though infection or Full article >>> A subungual hematoma is a collection of blood in the space between the nailbed and fingernail. Subungual hematoma results from a direct injury to the fingernail. Full article >>>. Subungual Exostosis. This is one of the more common bony lesions of the foot. It is a benign tumor of bone and cartilage. It is generally found underneath the toenail and may press upwards resulting in deformity of the nail plate and/ or soft tissues. In severe lesions, the overlying tissues may ulcerate and become infected Thank you for the A2A Ashay Salvi and Ankit Gaikwad Yes that is Blood under your Nail. It is termed as Sub Ungual hematoma. The term subungual means under the nail. The word hematoma means pocket of blood. There are many causes of it: * This i..

This is a really very common and probably makes up ~80% of the 'ingrown toenails' that come into our clinic. In these cases, the nail is not actually piercing the the skin but rather a small nodule of very hard 'corneum' skin tissue grows in the gutter of skin along side the nail - ie a corn. It is underneath the nail at this point. Subungual hyperkeratosis is a disorder characterized by an excessive reproduction of skin cells that accumulate between the nail and the nail bed (the small piece of skin of the finger on which the nail rests). Also involves thickening and lifting of the nail. If a nail is hit by subungual hyperkeratosis, he is thickened and has yellowish-white color

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Distal subungual onychomycosis is the most common dermatophyte type. It is most often caused by Trichophyton rubrum and manifests clinically by subungual hyperkeratosis and uplifting of the nail plate (Fig. 22.11). In contrast, proximal subungual onychomycosis is the least common type of onychomycosis Melanoma is a malignancy of the skin that originates in the melanocytes. Melanoma developing under the fingernails is what is termed as Subungual Melanoma. What makes this condition challenging is that it looks quite similar to a normal bruise in the fingernails. The symptoms of Subungual Melanoma begin with the appearance of a brownish black streak beneath the toenail or fingernail

Localized subungual hyperkeratosis and distal triangular plate erosion . Dermoscopic examination of the free edge of the nail plate at the distal extremity of a longitudinal abnormality, in most cases leukoxanthonychia often with splinter hemorrhages and not uncommonly with polychromia, often shows a localized subungual hyperkeratosis Definition. localized collection of pus at the site of an infection (characteristically a staphylococcal infecection). When a localized absces originates in a hair follicle, it is called a furnuncle or boil. A cluster of furncles in the subcutaneous tissue resluts in the formation of a carbuncle What are the signs and symptoms of subungual melanoma? 512 Views. Can consuming too much omega-6 fatty acids be harmful? 203 Views. How do I deal with shingles without having suffered from chickenpox? 62 Views. Should I see a doctor if I constantly pull my hair out uncontrollably? 83 Views. How can one get shingles without having a history of.

Longitudinal Melanonychia vs

A subungual hematoma is a small collection of blood between the nail bed and the nail. It initially appears as a purple area but turns black after a few days. Subungual hematomas are relatively minor and may result from a single injury to the nail or from chronic trauma and cause severe, throbbing pain Q4 Is drilling a hole through a fingernail to relieve pressure (subungual hematoma) considered medical treatment? A4 Yes. The draining of any fluids or blood is to be considered medical treatment. Q5 Is the development of a friction blister considered a recordable illness even with the use of protective equipment (i.e., gloves) Revolutionary way to safely drain subungual hematoma from home with just a few needle files. Procedure is relatively painless in relation to approaches with.

Subungual Ulcers Podiatry Aren

Subungual melanoma is a type of melanoma in the nails. Unlike other types of nail melanoma that grow in the surrounding skin, this type begins in the nail matrix. The nail matrix is a part of the. Self-care: Apply ice on your finger or toe for 15 to 20 minutes every hour or as directed. Use an ice pack, or put crushed ice in a plastic bag. Cover it with a towel. Ice helps prevent tissue damage and decreases swelling and pain. Elevate your finger or toe above the level of your heart as often as you can CHAPTER 1 Basic Word Structure CHAPTER SECTIONS Word Analysis, 2 Combining Forms, Suffixes, and Prefixes, 5 In Person, 21 Exercises and Answers, 23 Pronunciation of Terms, 33 Practical Applications, 37 Picture Show, 39 Review, 43 Terminology CheckUp, 46 CHAPTER OBJECTIVES • To divide medical terms into component parts • To analyze, pronounce, and spell medical terms usin Subungual fibroma is a painless, slow-growing tumor seen in the nail apparatus. They can be spherical or oval in shape and firm or elastic in consistency. Fibromas may become cherry shaped or polypoid and lift the nail in the distal subungual area. In addition to deformity of the nail, displacement of the pulp and erosion of the distal phalanx.

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subungual: Pertaining to under a nail. xanthoma: Flat, slightly elevated, rounded plaque or nodule usually found on the eyelids. pilosebaceous: Pertaining to a sebaceous gland and hair. dermatophytosis: Abnormal condition of fungus (plant) infection in the skin: pyoderma: Condition of pus (infection) within the skin. xeroderma: Abnormal. A subdural hematoma is most often the result of a severe head injury. This type of subdural hematoma is among the deadliest of all head injuries. The bleeding fills the brain area very rapidly, compressing brain tissue. This often results in brain injury and may lead to death. Subdural hematomas can also occur after a minor head injury Of note, we are now shifting toward the term longitudinal subungual acanthoma, which was introduced by Robert Baran and is an inclusive term which encompasses nail unit tumors of longitudinal keratosis, ungual seborrheic keratosis, as well as onychocytic matricoma Nail bed injury: Subungual hematoma by definition means that you had a laceration of the nail bed that is the source of the blood. So expect to see an open wound. 4.7k views Reviewed >2 years ago. Thank. Dr. Otto Placik agrees 1 doctor agrees. 1 comment. 2 thanks. Dr. Otto Placik commented This procedure is a modification of that used by a colleague, Dr. R. E. L. Holt, for the treatment of subungual hematoma. He heats a small wire (piece of paper clip) to white heat and burns an opening in the nail plate, releasing the blood. In some instances cautery drainage of subungual abscess will not suffice

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Subungual melanoma (SM) is a rare entity; its incidence ranges from 0.7%-3.5% of cutaneous melanomas. [1,2] It has a poor prognosis due to the delay in the diagnosis.This delay is depicted in the. Find definitions for medical terms with the online dictionary at WebMD Glomus tumor is a non-malignant vascular tumor that does not commonly occurs to a person and should not be confused with paraganglioma. The tumor arise from the glomus body which is a part of the skin's dermis layer and is involved in the human body's thermoregulation; as arterioles constricts with cold, glomus bodies expand in order to prevent heat loss Nailbed injuries are common, with fingertip injuries being the most often seen type of hand injuries. The fingertip is frequently injured because it is the point of interaction between the body and one's surroundings in the majority of activities performed on a daily basis, and it is the most distal portion of the upper extremities Crusted scabies may masquerade as hyperkeratotic eczema, psoriasis, Darier's disease and contact dermatitis as well as on the skin as on the nails. In the ordinary form of scabies, the nails are not involved but the distal subungual area may represent a reservoir of mites (collected from skin scratching), potential source for small epidemics

Treatment of subungual hematomas with nail trephination: a

Subungual exostosis is a rare solitary benign osteocartilaginous tumor that arises from the tuft of the distal phalanx beneath the nail. Because of its multiple clinical presentations, it is common.. Subungual exostosis is a benign, solitary bone lesion arising from the distal phalanx beneath the nail. The etiology is unknown, but trauma and chronic infection are 2 proposed mechanisms.1 These growths typically present in young adults or adolescents, and have a female-to-male predominance of 2:1 Distal Subungual Foreign Body. Trim nail. Grasp foreign body with forceps and extract. Observe for Subungual Hematoma from Nail Bed Laceration. Proximal Subungual Foreign Body. Digital Block. Elevate nail with Freer elevator (avoiding nail bed injury) Attempt to grasp foreign body and extract without nail removal. If unable, See Nail Removal Onychomycosis is a fungal infection of the nails that causes discoloration, thickening, and separation from the nail bed. Onychomycosis occurs in 10% of the general population, 20% of persons.

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A, At presentation, subungual tumors involving the patient's right great toe were causing distortion of the nail. B, At the 6-month follow-up after treatment with topical rapamycin, the subungual tumors were no longer noticeable, and dystrophy of the nail plate had subsided A. Using the following word parts, create or complete terms based on the following definitions: adip/o cutane/o -itis -plasty albin/o derm/o, dermat/o -lysis epi-caus/o diaphor/o -ose sub-cauter/o -algia -ous 1 The term melanoma refers to a malignancy of melanocytes, the pigment-producing cells in the epidermis. Acral melanoma was first separated as a distinct subtype of cutaneous malignant melanoma (CMM) by Arrington et al. in 1977. It is the least common subtype of melanoma, comprising only 2 to 3% of total melanoma diagnoses Subungual Melanoma is most easily defined as a cancer of the nail unit. Identified as one of the three main types of nail cutaneous cancer, subungal melanomas is the only one that originates from the tissue beneath the nail base, known as the nail matrix Documentation: There was no cleft of the uvula or sub mucosal palate by visual and palpable exam. Where would a subungual hematoma be located? Under the toenail/fingernail . A deficiency of cells in the blood is defined as: The term for pain in the ear is Subungual melanoma is a variant of acral lentiginous melanoma. Most subungual melanomas involve the great toe or thumb and generally arise from the nail matrix. The Hutchinson sign, the finding of pigmentation on the proximal nail fold as well as on the nail plate, is associated with advanced subungual melanoma. 1-3. Mucosal Melanom