Erythema multiforme induced by sorafenib for metastatic renal cell carcinoma

Masaomi Ikeda1, Tetsuo Fujita, Sumiyuki Mii

  • 1Department of Urology, Kitasato University School of Medicine, 1-15-1 Kitasato, Sagamihara, Kanagawa 252-0374, Japan. ikeda.masaomi@grape.plala.or.jp

Abstract

Insights

Sorafenib can cause erythema multiforme in metastatic renal cell carcinoma patients. This study found it occurred in 25% of Japanese patients, necessitating careful monitoring and dermatologist consultation.

Area of Science:

  • Oncology
  • Dermatology
  • Pharmacology

Background:

  • Sorafenib is a standard treatment for metastatic renal cell carcinoma (mRCC).
  • Sorafenib-induced erythema multiforme (EM) is considered rare.
  • This study investigates the incidence and characteristics of sorafenib-induced EM in mRCC patients.

Purpose of the Study:

  • To evaluate the occurrence of erythema multiforme in patients treated with sorafenib for metastatic renal cell carcinoma.
  • To assess the incidence and clinical presentation of sorafenib-induced EM.

Main Methods:

  • A cohort of 36 patients with mRCC treated with sorafenib (200-400 mg twice daily) from 2006-2011 was studied.
  • Skin biopsies were performed for patients with rash or EM, with histopathological confirmation.
  • Patch testing with sorafenib was conducted for patients diagnosed with EM.

Main Results:

  • A significant proportion of patients (78%) experienced skin reactions.
  • Erythema multiforme occurred in 9 out of 36 patients (25%).
  • All nine patients with EM showed a positive reaction to sorafenib on patch testing.

Conclusions:

  • Sorafenib-induced erythema multiforme may be more common than previously thought, particularly in Japanese patients.
  • Patients who develop EM while on sorafenib should not be retreated with the drug.
  • Close monitoring and dermatological consultation are crucial for managing sorafenib-induced skin toxicities.

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