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Author: Wafaa Binti Mowlabaccus, Medical Student, Department of Medicine, University of Mauritius, Reduit, Moka, Mauritius. DermNet NZ Editor in Chief: Adjunct A/Prof Amanda Oakley, Dermatologist, Hamilton, New Zealand. Copy edited by Gus Mitchell. July 2020.
A benign skin lesion is a non-cancerous skin growth.
Any individual from any age group can present with a benign skin lesion.
The features in common for benign skin lesions include:
Benign lesions can be classified by their cellular origin: melanocytic, keratinocytic, vascular, fibrous, fat, and so on,
Ephilides are genetically determined well-defined small brown macules with the following characteristics:
Lentigo simplex is not sun-induced. It has the following characteristics:
A melanocytic naevus can be histologically classified as junctional, compound, or dermal naevi depending on the location of nests of naevus cells.
A junctional naevus has naevus cells at the base of the epidermis.
Flat melanocytic lesions
A compound naevus has papular and flat components due to junctional and dermal naevus cells.
A dermal naevus is characterised by naevus cells in the dermis.
A solar lentigo is a sun-induced pigmented macule.
Seborrhoeic keratosis presents as a variable warty plaque.
Epidermoid cyst is a follicular nodule with a central punctum.
Corns and calluses are localised areas of thickened skin induced by pressure
Corns and calluses
Sebaceous hyperplasia occurs on the forehead and cheeks of adults.
An angioma is due to the proliferation of the endothelial cells.
A pyogenic granuloma is a vascular response to trauma and bacterial infection.
Dermatofibroma is a reactive lesion that presents as one or more firm dermal papules.
The lipoma is the most common benign soft-tissue tumour.
The most common type of skin tag is also called acrochordon.
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