Multiple primary soft tissue sarcomas.
BACKGROUND
The synchronous or metachronous development of multiple primary soft tissue sarcomas (STS) of different histopathology has been reported only in isolated case reports.


METHODS
The records of patients who developed multiple primary STS and who were treated at a tertiary cancer center between 1982 and 2003 were reviewed.


RESULTS
Nine patients with multiple primary STS were identified, representing 0.2% of all patients who were treated for STS. The median age of patients at the time of initial presentation with sarcoma was 60 years (range, 51-81 years). Most patients in this series (n = 7) had metachronous development of a second primary STS. The incidence of second primary sarcomas in patients who were diagnosed previously with STS (4.0 per 10,000 population per year) was significantly greater than the incidence of primary STS in the general population (3.2 per 100,000 population per year; P < 0.01).


CONCLUSIONS
Although it is an uncommon occurrence, patients who have a history of STS are at an increased risk for the development of a second primary STS.
Grobmyer
Stephen R
SR
Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York, USA.
Luther
Neal
N
Antonescu
Cristina R
CR
Singer
Samuel
S
Brennan
Murray F
MF
D017668:Age of Onset; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000473:pathology*; D011379:Prognosis; D012189:Retrospective Studies; D012307:Risk Factors; D012509:Sarcoma / Q000473:pathology*; D012983:Soft Tissue Neoplasms / Q000473:pathology*