A case of niraparib PARP-Inhibitor induced Sweet Syndrome in gynecologic cancer.

Sweet Syndrome, or acute febrile neutrophilic dermatosis, is a rare inflammatory dermatologic disorder that can be spontaneous, associated with malignancy, or drug-induced. Reports of Sweet Syndrome in gynecologic oncology patients are sparse, and the majority are thought to be malignancy-associated. The case presented here represents the third case of drug-induced Sweet Syndrome in a gynecologic oncology patient. To the best of our knowledge, this is the first report of Sweet Syndrome after initiation of a poly (ADP-ribose) polymerase inhibitor (PARPi) for maintenance therapy in the treatment of high grade serous ovarian carcinoma (HGSOC). This represents one of the most severe dermatologic adverse effects of treatment with PARPi reported to date, requiring treatment discontinuation.