TITLE

Malignant transformation of fibrous dysplasia: A case report

AUTHOR(S)
HIROSHI HATANO; TETSURO MORITA; TAKASHI ARIIZUMI; HIROYUKI KAWASHIMA; AKIRA OGOSE
PUB. DATE
July 2014
SOURCE
Oncology Letters;2014, Vol. 8 Issue 1, p384
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Secondary osteosarcoma from fibrous dysplasia (FD) is very rare. The etiology of FD is linked to activating missense mutations of the guanine nucleotide-binding protein a-subunit (GNAS) gene, which encodes the stimulatory a subunit of the G protein (Gsa) and is located at chromosome 20q13. These mutations are central to the pathogenesis of FD; however, it is not known whether Gsa mutations are retained following malignant transformation in FD. In addition, to the best of our knowledge, no studies have been performed on chromosomal analysis of secondary osteosarcoma from FD. The present study presents a case of secondary osteosarcoma arising from polyostotic FD in a 72-year-old male. Chromosomal analysis showed 44, X, -Y, add(4)(p11), add(5)(p15), der(11)add(11)(p15) t(1;11)(q21;q23), add(12)(q11), -13, der(22)t(12;22)(q11;p12). Reverse transcription-polymerase chain reaction (RT-PCR) analysis demonstrated the presence of a Gsa mutation in both the primary tumor cells and secondary osteosarcoma cells. There was no alteration in this mutation in the region of malignant transformation, which suggests that this mutation may be a useful clinical marker for distinguishing de novo osteosarcoma (primary osteosarcoma) from secondary osteosarcoma arising from FD.
ACCESSION #
110397739

 

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