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Giant congenital melanocytic nevus in newborn. Congenital melanocytic nevi may be divided into the following types: [6]: 690–1 Small-sized congenital melanocytic nevus is defined as having a diameter less than 2 cm (0.79 in). [6]: 690 Medium-sized congenital melanocytic nevus is defined as having a diameter more than 2 cm (0.79 in) but less ...
[1] [2]: 625 It is usually congenital in origin or appears within the first three decades. [3] A pedunculated lipofibroma is a solitary variant of nevus lipomatosus superficialis. It usually appears in adult life, and usually on the axilla, knee, ear, arm, scalp and the lower trunk. [3]
Neurocutaneous melanosis is a congenital disorder characterized by the presence of congenital melanocytic nevi on the skin and melanocytic tumors in the leptomeninges of the central nervous system. [2] These lesions may occur in the amygdala, cerebellum, cerebrum, pons and spinal cord of patients.
Symptoms of Syringocystadenoma papilliferum include papules, lack of hair on the scalp, blisters, subcutaneous nodules, and nevus sebaceous. [2]Nevus sebaceous is a congenital, hairless plaque composed of overgrown epidermis, sebaceous glands, follicles for hair, apocrine glands, and connective tissue.
However, a melanocytic nevus is benign, and melanoma is malignant. Most melanocytic nevi never evolve into a cancer, with the lifetime risk for an individual nevus being 1 in 3000 for men and 1 in 11 000 for women. [5] Moreover, dermatologists have a standardized system for determining whether a skin lesion is suspicious for malignant melanoma.
Several lesion types may be classified as MELTUMPs: these include atypical melanocytic proliferations with features that may overlap with atypical Spitz naevi/tumors, dysplastic naevi, pigmented epithelioid melanocytoma, deep penetrating naevi, congenital naevi, cellular nodules in congenital naevi, possible naevoid melanomas, and cellular blue ...
Nevus sebaceus or sebaceous nevus (the first term is its Latin name, the second term is its name in English; also known as an "organoid nevus" [1]: 661 and "nevus sebaceus of Jadassohn" [2]: 773 ) is a congenital, hairless plaque that typically occurs on the face or scalp. [3]
A connective tissue nevus is a skin lesion which may be present at birth or appear within the first few years of life. It is elevated, soft to firm in consistency, varying in size from 0.5 to several centimeters in diameter, and may manifest as grouped, linear, or irregularly-distributed lesions.