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Breast metastases of eccrine porocarcinoma
  1. Joana Ferreira Pinto1,
  2. Maria Antonia Vasconcelos2,
  3. Rita Cana Marques3 and
  4. Mauricio Chumbo4
  1. 1Radiology Department, University Hospital Center of Porto, Porto, Portugal
  2. 2Breast Unit and Radiology Department, Champalimaud Clinical Center / Champalimaud Foundation, Lisbon, Portugal
  3. 3Breast Unit and Pathology Department, Champalimaud Clinical Center / Champalimaud Foundation, Lisbon, Portugal
  4. 4Breast Unit, Champalimaud Clinical Center / Champalimaud Foundation, Lisbon, Portugal
  1. Correspondence to Dr Joana Ferreira Pinto; joanapintodx{at}


Eccrine porocarcinoma is a rare skin adnexal malignant neoplasm that may arise from a pre-existing benign eccrine poroma or without a predisposing factor. It is a highly invasive neoplasm and has a strong metastatic potential. The most frequently affected organs are the lymph nodes and rarely solid organs such as the liver, lungs and breast. We report a case of a woman with a history of surgically treated eccrine porocarcinoma that a year later presented with multiple lesions in both breasts and axillary lymphadenopathies. After a detailed imaging investigation, the diagnosis of metastatic lesions from porocarcinoma was made. To our knowledge, until the moment, only one case of breast metastasis of eccrine porocarcinoma has been reported in the literature.

  • radiology
  • breast cancer

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  • Contributors JFP wrote the manuscript and selected the radiological images; MAV reviewed and edited the manuscript; RCM provided the pathology images and their description; MC reviewed and edited the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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