RT Journal Article SR Electronic T1 Cowden syndrome and Lhermitte-Duclos disease in a family: a single genetic syndrome with pleiotropy? JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 458 OP 461 DO 10.1136/jmg.31.6.458 VO 31 IS 6 A1 C Eng A1 V Murday A1 S Seal A1 S Mohammed A1 S V Hodgson A1 M A Chaudary A1 I S Fentiman A1 B A Ponder A1 R A Eeles YR 1994 UL http://jmg.bmj.com/content/31/6/458.abstract AB Cowden syndrome is an autosomal dominant condition of multiple hamartomas. Patients with this phakomatosis have an increased risk of breast cancer and thyroid tumours. Lhermitte-Duclos disease is usually a sporadic condition of cerebellar ganglion cell hypertrophy, ataxia, mental retardation, and self-limited seizure disorder. We describe a three generation family with Cowden syndrome and Lhermitte-Duclos disease. Karyotyping performed on the peripheral lymphocytes of the proband and her affected mother showed a 46,XX complement. Single strand conformational polymorphism analysis failed to show any germline p53 mutations as a cause of the syndrome in this family.