Collision Tumor Associated with Sarcomatoid Eccrine Porocarcinoma and Basal Cell Carcinoma
Hyo Jung An1, Jung Eun Seol2, Ji Young Yun3
1Department of Pathology, Gyeongsang National University Changwon Hospital, Changwon, Korea.
Abstract:
A 'collision' tumor refers to the existence of two different neoplasms within the same tumor. Sometimes, the term 'biphasic tumor' is also used. However, a 'collision' tumor is defined as the occurrence of two neoplasms within proximity of each other yet maintaining distinctly defined, separate boundaries. In contrast, a 'biphasic' tumor demonstrates two or more phenotypically distinct neoplastic cell populations merging within the same space. Here, we report a case of collision tumor associated with sarcomatoid eccrine porocarcinoma and basal cell carcinoma arising in a 57-year-old male patient.
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