Transitional cell carcinoma in a patient with X-linked hyperimmunoglobulin M syndrome


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Abstract

Patients with X-linked hyperimmunoglobulin M syndrome (XHIGM) have a defective CD40–CD40 ligand system and further immunoglobulin class-switching. They may present with recurrent infection and malignancy involving the liver, pancreas or biliary tract. We report here a case of poorly differentiated transitional cell carcinoma in a young man with XHIGM even on regular treatment and discuss the possible pathogenesis. Given that the triggering of the CD40–CD40 ligand system has been found to improve tumor immunogenicity in recent studies, future immunotherapy targeting the CD40 ligand for these patients may be feasible to prolong their survival.

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