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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]
Carotenosis is a benign and reversible medical condition where an excess of dietary carotenoids results in orange discoloration of the outermost skin layer.The discoloration is most easily observed in light-skinned people and may be mistaken for jaundice.
Positive histologic stains that aid in the diagnosis of conditions of or affecting the human integumentary system Stain Cell, material, and/or structure(s) stained Condition(s) in which stain is positive Actin-specific enolase: Infantile digital fibromatosis: AE1/AE3: Squamous cell carcinoma: Alcian blue: Lipoid proteinosis Papular mucinosis ...
Estrogen also rises during pregnancy, and that, combined with progesterone, can contribute to the formation of melasma, which appears as dark brown spots or patches.
The lesions are most frequent on the lower limbs, but may occur anywhere on the body, including the hands, arms, torso and even the neck. They may vary in number and erupt in mass numbers. They consist of irregular patches of orange or brown pigmentation with characteristic "cayenne pepper" spots appearing within and at the edge of old lesions.
In short, melasma is a chronic skin condition that appears as darkened areas on the face due to an overproduction of melanin, says Gina Charles, MO, a family physician specializing in skincare. It ...
Intensive Brightening Treatment. Another one of Dr. Luke’s favorite retinol serums, this formula from PCA Skin is formulated with 0.5% retinol in addition to a patented Omnisome technology that ...
Café au lait spots, or café au lait macules, are flat, hyperpigmented birthmarks. [1] The name café au lait is French for "coffee with milk" and refers to their light-brown color. They are caused by a collection of pigment-producing melanocytes in the epidermis of the skin. [ 2 ]