MEN1 and thymus neoplasm: We performed a retrospective chart review of 294 patients with MEN1 germline mutations from 2 long-standing natural history protocols at our institute (NCT00001277 and NCT00001345) and identified 14 patients (4.8%) with thymic tumors (12 males and 2 females), including 6 patients previously reported (Gibril et al. 2003).