Background:
Extraocular sebaceous carcinomas are rare cutaneous malignancies that account for only about 25% of all sebaceous carcinomas. The most common site of occurrence is the head/neck region. They are aggressive neoplasms that possess metastatic potential to regional or distant sites. Wide local excision of the lesion with removal of regional lymph nodes is the usual mode of therapy.
Methods:
We present a series of three cases of sebaceous carcinomas occurring in extraocular sites outside the head and neck areas, like the axilla, chest wall, arm and thigh. One of these cases had an associated colonic carcinoma and constituted Muir-Torre syndrome (MTS). Another case presented with a skin nodule and regional nodal metastasis. The third case had a history of recurrent similar lesions at the same site.
Conclusion:
Although rare, extraocular sebaceous carcinomas are seen at varied sites and frequently pose problems in diagnosis. A longterm follow-up of these cases is warranted due to their aggressive behaviour, risks of recurrence, metastasis and the possibility of development of visceral malignancies.