Related Experiment Video
Updated: Aug 24, 2026

Surgical Treatment of an Endolymphatic Sac Tumor
Published on: May 26, 2023
Collision tumor of apocrine carcinoma and squamous carcinoma occurring in the ear
Giovanni D Lorusso1, Deba P Sarma, Mary Fazekas-May
1Department of Pathology, Veterans' Affairs Medical Center, New Orleans, LA 70112, USA. glorus@lsuhsc.edu
Abstract:
An unusual case of a cutaneous collision tumor comprised of a squamous cell carcinoma and an apocrine carcinoma occurring in the auricle of an 82-year-old man is presented. Microscopic study confirmed 2 distinct tumors: a squamous cell carcinoma arising in the epidermis and an adjacent apocrine carcinoma. We discuss the diagnostic criteria and review pertinent recent literature. To our knowledge, this is the first English language report of such a collision tumor.
Related Concept Videos
Anatomy of the Ear
Skin Cancer
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...

