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Subungual melanomas tend to affect the big toe and thumb the most, but it can occur on any finger or toe. The melanoma appears as a brown-black discoloration of the nail bed, with Verywell Health ...
A thin black line from the cuticle kept growing. It was the sign of rare, aggressive subungual melanoma. She got a 2nd opinion, advocated for herself.
Melanonychia (longitudinal streaking that darkens or does not grow out), especially on the thumb or big toe, may indicate subungual melanoma. White lines across the nail (leukonychia striata, or transverse leukonychia) may be Mees' lines or Muehrcke's lines. Small white patches are known as leukonychia punctata.
Melanoma is a group of serious skin cancers that arise from pigment cells (melanocytes); acral lentiginous melanoma is a kind of lentiginous [8] skin melanoma. [6] ALM makes up less than 5% of all melanomas, but is considered the most common subtype in people with darker skin and is rare in people with lighter skin types. [ 9 ]
Beau's lines should also be distinguished from Mees' lines of the fingernails, which are areas of discoloration in the nail plate. As the nail grows out, the ridge in the nail can be seen to move upwards until it reaches the fingertip. When it reaches this point the fingertips can become sore for a few days as the nail bed is exposed by the ...
[3]: 671 This is an important sign of subungual melanoma although is not an infallible predictor. Periungual hyperpigmentation occurs in at least one nonmelanoma skin cancer, Bowen's disease of the nail unit. This is a nail fold pigmentation which then widens progressively to produce a triangular pigmented macule with associated nail dystrophy.
Melanonychia is a black or brown pigmentation of a nail, and may be present as a normal finding on many digits in Afro-Caribbeans, as a result of trauma, systemic disease, or medications, or as a postinflammatory event from such localized events as lichen planus or fixed drug eruption.
UV nail lamps, which are used in nail salons to dry nail polish, are another common and widespread source of UV radiation that could be avoided. [ 96 ] [ 97 ] Although the risk of developing skin cancer through UV nail lamp use is low, it is still recommended to wear fingerless gloves and/or apply SPF 30 or greater sunscreen to the hands before ...