Rare Delayed Immune Thrombocytopenic Purpura Associated With Neoadjuvant Immunotherapy

Immune thrombocytopenia typically occurs within 10 weeks of initiating immunotherapy. In this case, the patient experienced no hematologic complications during a treatment period extending over 3 months. However, after cessation of immunotherapy and subsequent surgery, delayed onset immune thrombocytopenia occurred. Clinicians must recognize the importance and complexity of diagnosing immune thrombocytopenia (ITP).