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Collision tumors: CAMEL, METRO and other acronyms
Katrin Kerl1, Ingrid H Wolf, Jivko Kamarachev
1Department of Dermatology, Medical University of Graz, Austria.
Summary
This study details two rare collision tumors: a melanocytic tumor within a trichoblastoma (METRO) and squamous cell carcinoma with melanoma cells (CAMEL). These unique cases highlight unusual tumor interactions in dermatopathology.
Area of Science:
- Dermatopathology
- Oncology
- Surgical Pathology
Background:
- Collision tumors, where two distinct neoplasms coexist, present diagnostic challenges.
- Understanding the interplay between different tumor types is crucial for accurate diagnosis and treatment planning.
Observation:
- Two exceptional cases of collision tumors were identified and analyzed.
- Case 1: A melanocytic tumor was found within a trichoblastoma (METRO).
- Case 2: Squamous cell carcinoma was colonized by melanoma-derived dendritic cells (CAMEL).
Findings:
- Both neoplasms exhibited an intimate relationship between their distinct tumor components.
- The METRO acronym denotes MElanocytic tumor + TRichOblastoma.
- The CAMEL acronym denotes CArcinoma + MELanoma, aiding in memorization.
Implications:
- These cases expand the spectrum of known collision tumors in dermatopathology.
- The findings underscore the importance of meticulous histopathological examination to identify all neoplastic components.
- The proposed acronyms (METRO and CAMEL) offer a novel mnemonic for these rare tumor combinations.
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