Collision Tumor: A Diagnostic Challenge

  • Alexandre Miroux Catarino Médico Interno de Dermatovenereologia/Resident of Dermatology and Venereology, Serviço de Dermatologia, Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal
  • Maria Goreti Catorze Assistente Hospitalar Graduada de Dermatovenereologia, Serviço de Dermatologia, Centro Hospitalar de Lisboa Ocidental, Lisboa, Portugal/Consultant of Dermatology and Venereology, Dermatology Department, Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal
  • Ângela Pereira Assistente Hospitalar de Dermatovenereologia/Consultant of Dermatology and Venereology
  • Isabel Viana Assistente Hospitalar Graduada de Dermatovenereologia, Serviço de Dermatologia, Centro Hospitalar de Lisboa Ocidental, Lisboa, Portugal/Consultant of Dermatology and Venereology, Dermatology Department, Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal
DOI: https://doi.org/10.29021/spdv.75.2.778
Keywords: Collision Tumor, Dermoscopy, Neoplasms, Multiple Primary, Nevus, Blue, Skin Neoplasms

Abstract

The coexistence of two or more different neoplasms, benign or malignant, in the same cutaneous lesion is called a "collision tumor”. The clinical diagnosis is difficult and dermatoscopy is an often useful tool, however it may not be enlightening. We present the case of a rare association between a blue nevus and a histiocytofibroma that both clinically and dermatoscopically could be confused with malignant melanoma.

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Published
2017-07-20
How to Cite
Miroux Catarino, A., Catorze, M. G., Pereira, Ângela, & Viana, I. (2017). Collision Tumor: A Diagnostic Challenge. Journal of the Portuguese Society of Dermatology and Venereology, 75(2), 197-199. https://doi.org/10.29021/spdv.75.2.778
Issue
Vol 75 No 2 (2017): Abril - Junho
Section
Case Reports

All articles in this journal are Open Access under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).