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Cutaneous drug eruptions induced by sorafenib: a case series
Jessica S Maddox1, Elaine F Kung, Vesna Petronic-Rosic
1University of Chicago, Department of Medicine, Section of Dermatology, Chicago, IL, USA. jessica.maddox@uchospitals.edu
Abstract:
Sorafenib, an epidermal growth factor receptor inhibitor, is a novel treatment used for malignancies resistant to traditional chemotherapy. Epidermal growth factor receptors (EGFR) are a family of 4 transmembrane tyrosine kinase receptors that, via signal transduction pathways, mediate cell growth, differentiation, and survival. Sorafenib is a targeted drug specifically engineered to inhibit Raf serine/threonine kinases, which are part of the reticular activating system (RAS) oncogene pathway. In addition, in vitro studies have shown sorafenib to be a potent multikinase inhibitor, targeting receptor tyrosine kinases associated with tumor angiogenesis (VEGFR-2, VEGFR-3, and PDGFR-beta) and progression. Initially, approved for use in advanced renal cell carcinoma, sorafenib is being studied for the treatment of other solid tumors at our institution. During the clinical trial, 4 patients were referred to the dermatology clinic for evaluation and treatment of diffuse erythematous eruptions all occurring 8 to 10 days after initiating sorafenib at a dose of 400 mg twice daily. These eruptions occurred in demographically similar patients and displayed similar clinical characteristics and histopathological findings. Clinically, 3 of 4 patients had facial erythema, 3 of 4 had generalized macular erythema, 3 of 4 had widespread follicular-based papular eruption, and 4 of 4 had palmoplantar erythrodysesthesia. Half of the patients had cutaneous eruptions without systemic effects, while the other half had hypersensitivity reactions requiring withdrawal from clinical trial. This is the first case series illustrating drug eruptions induced by sorafenib.
Insights
Sorafenib, a targeted cancer therapy, can cause significant skin reactions in patients. This study details four cases of drug eruptions, including facial erythema and palmoplantar erythrodysesthesia, linked to sorafenib treatment.
Area of Science:
- Oncology
- Dermatology
- Pharmacology
Background:
- Sorafenib is a targeted therapy inhibiting Raf kinases and receptor tyrosine kinases involved in tumor growth and angiogenesis.
- It is approved for advanced renal cell carcinoma and investigated for other solid tumors.
- Epidermal growth factor receptors (EGFR) are key in cell signaling, and their inhibition is a therapeutic strategy.
Observation:
- Four patients developed diffuse erythematous eruptions 8-10 days after starting sorafenib (400 mg twice daily).
- Clinical presentations included facial and generalized macular erythema, follicular papular eruptions, and palmoplantar erythrodysesthesia.
- Half experienced cutaneous eruptions without systemic effects; the other half had hypersensitivity reactions requiring trial withdrawal.
Findings:
- This case series is the first to illustrate drug eruptions specifically induced by sorafenib.
- The observed eruptions share similar clinical and histopathological characteristics.
- Skin reactions varied in severity, from localized rashes to systemic hypersensitivity.
Implications:
- Dermatologists should be aware of potential sorafenib-induced cutaneous adverse events.
- Early recognition and management of these eruptions are crucial for patient safety and treatment adherence.
- Further research is needed to understand the mechanisms and optimal management of sorafenib dermatopathies.
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