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Dermatosis papulosa nigra (DPN) is a condition of many small, benign skin lesions on the face, a condition generally presenting on dark-skinned individuals. [1]: 638–9 DPN is extremely common, affecting up to 30% of Black people in the US. [2] From a histological perspective, DPN resembles seborrheic keratoses. [3]
B) Typical lesions that are often found on the nape of the neck and crease of the buttocks are shown (black arrows). C) A typical lesion on the lower back in an adult with McCune-Albright syndrome demonstrates jagged borders (white arrow). Note the spinal asymmetry due to fibrous dysplasia-related scoliosis. Specialty: Medical genetics Named after
Congenital nevus. Note the variable coloration and slightly irregular border. The congenital melanocytic nevus appears as a circumscribed, light brown to black patch or plaque, potentially very heterogeneous in consistency, covering any size surface area and any part of the body.
Intradermal melanocytic nevus (dermatoscopic image) According to the American Academy of Dermatology, the most common types of moles are skin tags, raised moles, and flat moles. Benign moles are usually brown, tan, pink, or black (the latter especially on dark-colored skin). They are circular or oval and are usually small (commonly between 1 ...
A beauty mark or beauty spot is a euphemism for a type of dark facial mark so named because such birthmarks are sometimes considered an attractive feature. [1] Medically, such "beauty marks" are generally melanocytic nevus, more specifically the compound variant. Moles of this type may also be located elsewhere on the body, and may also be ...
It may appear as light brown in fair-skinned people, to almost black in people with darker skin. Coming in a variety of sizes and appearances, they may be irregular in shape and flat, or raised and lumpy in appearance and feel. Such naevi can also manifest themselves as beauty marks, which most commonly appear on the face, neck or arms.
A 12-year-old girl with Noonan syndrome, displaying typical webbed neck and double structural curve with rib deformity. Specialty: Medical genetics, pediatrics: Symptoms: Mildly unusual facial features, short height, congenital heart disease, bleeding problems, skeletal malformations [1] Complications: Leukemia [1] Usual onset: Present at birth ...
Mongolian spot is a congenital developmental condition—that is, one existing from birth—exclusively involving the skin.The blue colour is caused by melanocytes, melanin-containing cells, that are usually located in the surface of the skin (the epidermis), but are in the deeper region (the dermis) in the location of the spot. [6]