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Showing posts with the label Pyogenic granuloma

Nevus, lentigo, Seborrheic Keratosis, Pyogenic granuloma

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Nevus (pl. Nevi) Nevus (pl. Nevi)  - Umbrella term for a group of benign, circumscribed overgrowth of cells composed of tissue elements normally present in the skin.  The most well known of the group is the melanocytic nevus (“mole”), composed of an increased proliferation of melanocytes, but multiple other types of nevi exist, such as vascular nevi, epidermal nevi, connective tissue nevi. Melanocytic Nevus  - These can be congenital, but most are acquired after birth.  They vary greatly in appearance.  They can be flat, elevated, smooth, rough, polyp-like, or sessile.  Nevi often come in a shade of brown, but some may be skin colored or occasionally blue in color. It is important to distinguish a melanocytic nevus from  malignant melanoma .  A symmetric shape, regular border, uniform color, small size (diameter <6 mm) are features that help distinguish the former from the latter.  Change in color, shape, or size, bleeding, pruritus, or other symptoms may be signs of suspicious l