A collision tumor of basal cell carcinoma and atypical fibroxanthoma: A case report
Mariko Suzuki‐Ueno, Yoshiaki Fujikawa, Dai Hamaoka, Kaoru Umemura, Takamasa Ohnishi

TL;DR
This paper reports a rare case of a skin tumor combining two distinct cancer types in an elderly man.
Contribution
The novelty lies in documenting a collision tumor of basal cell carcinoma and atypical fibroxanthoma.
Findings
A collision tumor involving basal cell carcinoma and atypical fibroxanthoma was diagnosed in a patient.
The case highlights the rare coexistence of two distinct skin tumor types in one lesion.
Abstract
An 83‐year‐old man presented an elevated skin lesion in the left temporal area. The resected specimen was identified between a basal cell carcinoma and an atypical fibroxanthoma. A final diagnosis of basal cell carcinoma and atypical fibroxanthoma was made. This study reports a rare case of a cutaneous collision.
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Taxonomy
TopicsCancer and Skin Lesions · Nonmelanoma Skin Cancer Studies · Soft tissue tumor case studies
