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Inclusion of malignant fibrous histiocytoma in the tumour spectrum associated with hereditary non‐polyposis colorectal cancer
Author(s) -
Sijmons Rolf,
Hofstra Robert,
Hollema Harry,
Mensink Rob,
van der Hout Annemieke,
Hoekstra Harald,
Kleibeuker Jan,
Molenaar Willemina,
Wijnen Juul,
Fodde Riccardo,
Vasen Hans,
Buys Charles
Publication year - 2000
Publication title -
genes, chromosomes and cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.754
H-Index - 119
eISSN - 1098-2264
pISSN - 1045-2257
DOI - 10.1002/1098-2264(2000)9999:9999<::aid-gcc1042>3.0.co;2-t
Subject(s) - msh2 , microsatellite instability , germline mutation , mlh1 , pathology , colorectal cancer , dna mismatch repair , cancer research , germline , biology , immunohistochemistry , mutation , cancer , microsatellite , medicine , genetics , gene , allele
Sarcomas, including the malignant fibrous histiocytomas (MFHs), are not known to be part of the tumour spectrum of hereditary non‐polyposis colorectal cancer (HNPCC) as epidemiologically established. Therefore, occurrence of MFH in an HNPCC family may very well be coincidental. HNPCC is associated with germline mutations in DNA mismatch repair genes, including the MSH2 gene. We analysed an MFH diagnosed in a 45‐year‐old male HNPCC patient carrying a germline MSH2 mutation for HNPCC‐associated molecular characteristics, to investigate a possible relationship between the tumour and that mutation. DNA analysis revealed microsatellite instability and loss of one MSH2 copy, and immunohistochemistry showed absence of nuclear MSH2 protein staining. To investigate whether this is a common finding in MFH, microsatellite instability and nuclear MSH2 protein staining was tested for in 5 and 6 sporadic MFHs, respectively. None showed microsatellite instability and all stained positively for MSH2. Together, these findings show that in rare cases, MFH may be part of the HNPCC tumour spectrum. © 2000 Wiley‐Liss, Inc.