A biopsy of the affected skin and histological examination under the microscope is necessary to diagnose<unk> . Differential diagnosis Several other conditions may mimic<unk> . These conditions include infections such as an outbreak of herpes simplex, herpes simplex vegetans, molluscum contagiosum, verruca vulgaris, and condyloma acuminatum. Similarly, benign and cancerous non-infectious conditions may also present in a similar manner and include conditions such as angiokeratoma, dermatitis herpetiformis, hemangioma, epidermal nevus, lymphangiectasia, melanoma, angiosarcoma, and metastatic carcinomas.
Lymphangioma circumscriptum
Angiokeratoma
Cutaneous meningioma
Cherry angioma
Steatocystoma multiplex
Generalized trichoepithelioma
Nevus comedonicus
Xanthoma disseminatum