Rapid desensitization to brentuximab vedotin after severe anaphylaxis in the treatment of refractory Hodgkin's lymphoma.

INTRODUCTION: Brentuximab vedotin is a monoclonal antibody drug conjugate used for the treatment of patients with Hodgkin lymphoma. Hypersensitivity reactions to brentuximab vedotin may include cutaneous, cardiovascular, respiratory, gastrointestinal and neurological signs and symptoms. CASE REPORT: We present the case of a 23-year-old Mexican female with stage IV progressive classical nodular sclerosing Hodgkin lymphoma who received multiple previous chemotherapy regimens. Brentuximab vedotin at 1.8 mg/kg (180 mg total dose), for 21-day cycles was indicated. Within 5 min of infusion of the 5th cycle of brentuximab, she developed severe anaphylaxis (hives, angioedema, diaphoresis, tachycardia, dyspnea, hypoxemia and loss of consciousness), which was successfully controlled with epinephrine, steroids and antihistamines.Management and outcome: Intradermal skin test at a concentration of 0.1 mg/ml was positive. Due to the severity of the symptoms and the lack of access to alternative treatments, we performed a desensitization protocol. A total of 180 mg of brentuximab was given in three bag solutions in 12 steps, with an initial concentration dose of 1/100 of the total dose in a course of 5.56 h with no hypersensitivity reactions. DISCUSSION: Severe anaphylaxis has been reported in 1.2% of patients receiving brentuximab vedotin. Patients who are treated by rapid drug desensitization with their first option therapy present a favorable survival rate with better cost-effectiveness in comparison to second-line treatment.