Drug-Induced Immune Thrombocytopenia From Administration of a Local Anesthetic Agent Resulting in Splenectomy.

Thrombocytopenia is a common clinical condition, and drug-induced immune thrombocytopenia (DITP) should be considered in hospitalized patients with severe thrombocytopenia who are exposed to new medications. The potential mechanism is described to be drug-triggered antibody-mediated platelet destruction causing petechiae and mucosal bleeding. Severe form of DITP can be refractory to systemic steroids and even intravenous immunoglobulin administration. Such cases usually require splenectomy for definitive treatment. A number of substances including medications, herbal remedies, and even food items have been identified with a definitive or probable causal role in DITP. However, it is rarely reported from locally administered medications such as local anesthetic drugs. We present a unique case of severe DITP from lidocaine that resulted in refractory DITP requiring splenectomy for definitive treatment.