Pazopanib as a new culprit in neutrophilic eccrine hidradenitis

Neutrophilic eccrine hidradenitis (NEH) usually manifests as asymptomatic or painful infiltrated erythematous papules or plaques of variable sizes. It is characterized by dense neutrophilic infiltration and necrosis of the eccrine secretory coils in histopathology. The condition is most commonly reported in patients with hematologic malignancy, who have been undergoing chemotherapy. Direct drug toxicity to the eccrine glands has been proposed to be the cause of NEH. Although several drugs have been reported to induce NEH, the tyrosine kinase inhibitors have only rarely been identified as culprits in the literature. Here, we present a case of pazopanib-related NEH in a patient with uterine adenocarcinoma, in which NEH recurred after the reintroduction of pazopanib. To the best of our knowledge, this is the first report of a case of pazopanib-related NEH.