Skin Rash as a Side Effect of Bortezomib: A Case Report.

Bortezomib is a novel proteasome inhibitor widely used in the treatment of multiple myeloma, especially in the case of recurrent, relapsing, or refractory myeloma. Its common side effects include nausea, vomiting, neuropathic pain, and hemorrhage. Cutaneous manifestations are considered rare. Here we report a case of a 72-year-old female patient, and a known case of multiple myeloma on VRD protocol (bortezomib [Velcade] combined with lenalidominde [Revlimid] and dexamethasone) after relapse. The patient presented with a complaint of raised, itchy, erythematous skin rash, starting in the soles and palms and then spreading to the whole body. A skin biopsy confirmed that the lesions were due to an allergic reaction. The patient was admitted as a case of sepsis and died. Skin rash is considered a rare side effect of bortezomib, with variable presentation and onset. The mainstay of treatment is corticosteroids.