RT Journal Article
SR Electronic
T1 Imaging Features of Desmoid-type Fibromatosis in the Teres Major Muscle
JF In Vivo
JO In Vivo
FD International Institute of Anticancer Research
SP 555
OP 559
VO 27
IS 4
A1 NISHIO, JUN
A1 AOKI, MIKIKO
A1 NABESHIMA, KAZUKI
A1 IWASAKI, HIROSHI
A1 NAITO, MASATOSHI
YR 2013
UL http://iv.iiarjournals.org/content/27/4/555.abstract
AB Desmoid-type fibromatosis is a locally aggressive fibroblastic neoplasm with a tendency for local recurrence, despite adequate surgical resection. Its clinical presentation, biological behavior, and natural history can vary considerably. We present a unique case of desmoid-type fibromatosis arising in the left teres major muscle of a 62-year-old female. Physical examination showed a 7-cm, elastic-hard, immobile, tender mass. Magnetic resonance imaging (MRI) revealed a partially ill-defined mass, with intermediate signal intensity on T1-weighted sequences and heterogenous high signal intensity on T2-weighted sequences. Contrast-enhanced fat-suppressed T1-weighted sequences demonstrated intense and homogenous enhancement throughout the mass. Integrated positron-emission tomographic (PET)/computed tomographic (CT) images showed moderate focal 18F-fluorodeoxyglucose uptake corresponding to the clinically palpable and MRI-described soft tissue mass, with a maximal standardized uptake value of 4.85. The possibility of a malignant lesion was raised. Following an open biopsy, wide resection of the tumor was performed. Histological examination confirmed the diagnosis of desmoid-type fibromatosis. Finally, we discuss the imaging features of this peculiar neoplasm on MRI and PET/CT.