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March 11, 2020

Co-occurrence of Merkel Cell Carcinoma and Chronic Inflammatory Demyelinating Polyneuropathy

Author Affiliations
  • 1Multidisciplinary Skin Cancer Management Program, Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, New York
JAMA Dermatol. 2020;156(5):597-598. doi:10.1001/jamadermatol.2020.0055

Merkel cell carcinoma (MCC) is a rare type of neuroendocrine skin cancer with an annual incidence rate of about 0.7 cases per 100 000 persons.1 Chronic inflammatory demyelinating polyneuropathy (CIDP) is a rare autoimmune disorder of the peripheral nerves and nerve roots, with an annual incidence rate of 0.33 cases per 100 000 persons.2 We describe 3 patients diagnosed as having both MCC and CIDP and discuss the possible association between these 2 diseases.

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