The cytology of molluscum contagiosum mimicking skin adnexal tumor.

Molluscum contagiosum is a cutaneous viral infection presenting as multiple, umbilicated papules and vesicles. The cytology of molluscum contagiosum in an 11-year-old boy, which presented atypically as a solitary nodule over the right cheek, mimicking a skin adnexal tumor is reported here. Fine needle aspiration cytology plays a vital role in establishing the correct diagnosis of clinically unsuspected cases, and hence, the proper management of such lesions. The cytology of molluscum contagiosum is characterized by the presence of numerous large intracytoplasmic basophilic bodies that push the host nucleus to the periphery, giving a signet ring appearance to the superficial epidermal cells.