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Clinical features

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The histiocytoma generally arises from a site of trauma e.g. an insect bite.

Initially the lesion develops as a firm papule or a button-like tumour. Lesions may be slightly tender and their size may vary slightly over time.

The rapid growth and brown pigmentation of the lesion may cause it to be confused with a melanoma.

Fibrous histiocytomas tend to dimple inward upon lateral compression. This feature is useful in distinguishing them from nodular melanomas which tend to protrude outward upon lateral compression.

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