MEN1 and leiomyoma: Leiomyomas appear to occur in 10% or less of MEN1 patients (25, 26, 46, 52, 87) and 12.6% of women with MEN1 (24), but there has been no systematic evaluation of the prevalence of these tumors in MEN1 patients and so the true prevalence remains unknown, especially noting that uterine leiomyomas are very common in the general population and thus may not necessarily be an MEN1-related neoplasm in female patients.