Collision tumor of malignant tumors of the skin: dermal squamomelanocytic tumor coexisting with basal cell carcinoma-a rare case

Pantelis Diamantopoulos; Panagiotis Gouveris; Stavroula Diamantopoulou; Lilika Tseloni; Evdokia Arkoumani; Niki Arnogiannaki; Spiridon Stavrianos

doi:10.1093/jscr/rjab560

Collision tumor of malignant tumors of the skin: dermal squamomelanocytic tumor coexisting with basal cell carcinoma-a rare case

J Surg Case Rep. 2021 Dec 20;2021(12):rjab560. doi: 10.1093/jscr/rjab560. eCollection 2021 Dec.

Authors

Pantelis Diamantopoulos¹, Panagiotis Gouveris², Stavroula Diamantopoulou³, Lilika Tseloni¹, Evdokia Arkoumani⁴, Niki Arnogiannaki⁴, Spiridon Stavrianos¹

Affiliations

¹ Department of Plastic Surgery, St. Savvas Anticancer-Ongologic Hospital of Athens, Athens, Greece.
² 2nd Department of Medical Ongology, St. Savvas Anticancer-Ongologic Hospital of Athens, Athens, Greece.
³ Department of Maxillofacial Surgery, Evangelismos Hospital of Athens, Athens, Greece.
⁴ Department of Histopathology, St. Savvas Anticancer - Ongologic Hospital of Athens, Athens, Greece.

Abstract

Collision tumors are neoplasms coexisting in the some anatomical area. The most common combination is melanocytic nevus with basal cell carcinoma. Melanocytic nevus with basal cell carcinoma constitutes the most common cutaneous combination. Co-existence of two malignant neoplasms is extremely rare. We describe the case of a 69-year-old man who was admitted to our hospital with a nodular mass on the back. We performed an excisional biopsy that revealed collision tumor, consisting of basal cell carcinoma along with mixed melanosquamous carcinoma. Subsequently, wide excision with sentinel node biopsy was performed. The sentinel node was negative. The patient did not receive any ongologic therapy.

Publication types

Case Reports