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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 healthy people. [1]
Toenails which protrude unevenly may concentrate force on the toenail; properly-cut nails are therefore also important. [4] Some susceptible runners may also have Morton's toe. In this variant of human foot anatomy, the second toe extends further out than the great toe. This can make it harder to find shoes with adequate space around the toes.
The typical symptoms are non-scaly, smooth, brown-black painless spots on the palms of hands and soles of feet. The growth of H. werneckii in liquid media is often yeast-like, although it can switch to filamentous growth. The mechanism of the switch is not known. The cells appear brown because of melanin production. [3]
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 ...
Woman's toe was amputated after spot under nail diagnosed as melanoma. The toll of acral lentiginous melanoma. ... It has photos of what the disease can look like in patients with black and brown ...
Five-day-old inflamed epidermal inclusion cyst. The black spot is a keratin plug which connects with the underlying cyst. Specialty: General surgery, infectious disease, dermatology: Symptoms: Redness, pain, swelling [1] Usual onset: Rapid: Causes: Bacterial infection (often MRSA) [1] Risk factors: Intravenous drug use [2] Diagnostic method ...
A case of fungal infection of the big toe Advanced fungal infection of the big toe. The most common symptom of a fungal nail infection is the nail becoming thickened and discoloured: white, black, yellow or green. As the infection progresses the nail can become brittle, with pieces breaking off or coming away from the toe or finger completely.
It starts as a painless wet nodule, which may be present for years before ulceration, swelling, grainy discharge and weeping from sinuses and fistulae, followed by bone deformity. [3] Several fungi can cause eumycetoma, [5] including: Madurella mycetomatis, Madurella grisea, Curvularia lunata, Scedosporium species, Acremonium and Fusarium ...