[PDF][PDF] Collision tumor: Merkel cell carcinoma and sebaceous carcinoma overlying Bowen's disease

R Rupchandani, T Umar, S Walsh - Our Dermatol Online, 2021 - odermatol.com
Collision tumors are the rare lesions in which two or more histopathologically distinct tumors
coexist with distinct morphological features. Herein, we present the case of an 89-year-old …