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Muir‐Torre syndrome: clinical features and molecular genetic analysis
Author(s) -
ESCHE C.,
KRUSE R.,
LAMBERTI C.,
FRIEDL W.,
PROPPING P.,
LEHMANN P.,
RUZICKA T.
Publication year - 1997
Publication title -
british journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.304
H-Index - 179
eISSN - 1365-2133
pISSN - 0007-0963
DOI - 10.1046/j.1365-2133.1997.01805.x
Subject(s) - frameshift mutation , germline mutation , carcinogenesis , germline , mutation , genetics , microsatellite instability , lynch syndrome , dna mismatch repair , cancer , somatic cell , medicine , colorectal cancer , cancer research , biology , allele , gene , microsatellite
Summary We report a 62‐year‐old man with rectal cancer, two keratoacanthomas and multiple sebaceous adenomas, epitheliomas and sebaceous hyperplasia. His brother and father died from colorectal cancer. A subgroup of patients with the Muir‐Torre syndrome (MTS) is allelic to the cancer family syndrome. This genetic disorder is caused by an autosomal dominant inherited germline mutation in one of the DNA mismatch repair genes. It is thought that a somatic mutation of the other allele leads to a genomic instability responsible for tumorigenesis. In the patient presented here the instability was detected in two characteristic skin lesions; sebaceous adenoma and epithelioma. The search for a causal germline mutation revealed a frameshift mutation in the mismatch repair gene hMSH2 leading to a truncated protein. A presymptomatic molecular diagnosis can be offered to the children of the patient.