14th July 2026

Aetiology

Cherry angiomas are the most common cutaneous vascular proliferation, which increase in frequency with advancing age. Actinic keratosis is most commonly seen in fair-skinned people and those with increased sun exposure. In some cases, actinic keratosis may progress to SCC. Sebaceous hyperplasia is commonly seen in elderly and immunosuppressed patients. There is a link between UV-induced skin ageing and seborrheic keratosis. Keratoacanthomas are most commonly seen in those with increased sun exposure, workers exposed to tar, and those immunocompromised.

Malignancy in those with lipoma is rare but can be seen in lesions with the clinical appearance of a lipoma, liposarcoma. Characteristics in keeping with liposarcoma include:

• > 5cm diameter
• Lesion in the extremities, retroperitoneally or abdominal wall
• Rapid growth or bone invasion