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Tinea nigra. Tinea nigra, also known as superficial phaeohyphomycosis and Tinea nigra palmaris et plantaris, [2] is a superficial fungal infection, a type of phaeohyphomycosis rather than a tinea, that causes usually a single 1–5 cm dark brown-black, non-scaly, flat, painless patch on the palms of the hands and the soles of the feet of ...
Tinea is often called "ringworm" because the rash is circular, with a ring-like appearance. It is sometimes equated with dermatophytosis, and, while most conditions identified as "tinea" are members of the imperfect fungi that make up the dermatophytes, conditions such as tinea nigra and tinea versicolor are not caused by dermatophytes.
Dermatophytosis. Dermatophytosis, also known as tinea and ringworm, is a fungal infection of the skin [2] (a dermatomycosis), that may affect skin, hair, and nails. [1] Typically it results in a red, itchy, scaly, circular rash. [1] Hair loss may occur in the area affected. [1] Symptoms begin four to fourteen days after exposure. [1]
Fungi are everywhere, but only some cause disease.[13] Fungal infection occurs after sporesare either breathed in, come into contact with skin or enter the body through the skin such as via a cut, woundor injection.[3] It is more likely to occur in people with a weak immune system.[14]
Dermatophyte (from Greek δέρμα derma "skin" (GEN δέρματοςdermatos) and φυτόνphyton "plant") [ 1 ] is a common label for a group of fungus of Arthrodermataceae that commonly causes skin disease in animals and humans. [ 2 ] Traditionally, these anamorphic (asexual or imperfect fungi) mold genera are: Microsporum, Epidermophyton ...
Onychomycosis, also known as tinea unguium, [4] is a fungal infection of the nail. [2] Symptoms may include white or yellow nail discoloration, thickening of the nail, and separation of the nail from the nail bed. [2] Fingernails may be affected, but it is more common for toenails. [3] Complications may include cellulitis of the lower leg. [3]
Acanthosis nigricans. Acanthosis nigricans is a medical sign characterised by brown-to-black, poorly defined, velvety hyperpigmentation of the skin. [1] It is usually found in body folds, [2] such as the posterior and lateral folds of the neck, the armpits, groin, navel, forehead and other areas. [1]
Chromoblastomycosis. Chromoblastomycosis is a long-term fungal infection of the skin [2] and subcutaneous tissue (a chronic subcutaneous mycosis). [3] It can be caused by many different types of fungi which become implanted under the skin, often by thorns or splinters. [4] Chromoblastomycosis spreads very slowly. [citation needed]