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Abstract
BackgroundLow-grade myofibroblastic sarcoma (LGMS) is a rare type of tumor. Previous research has paid much attention to reporting pathological analyses of LGMS. However, only few systematic clinical and/or radiological studies have been conducted.MethodsThis study recruited 14 cases (8 males and 6 females) of LGMS. X-ray or computer tomography (CT) scan were performed on 11 cases. MRI was performed on 5 cases.ResultsX-Ray and CT scan: Five cases developed LGMS in bones, including 3 cases in the distal femur, 1 in the right shoulder blade, and another 1 in the right inferior ramus. Massive infiltrative and vermiform bone destruction with poorly-circumscribed lesion margins and partial soft tissue masses were observed. The other 9 cases were developed in soft tissues. Out of them, 4 cases presented slightly irregular hyper- or lower-density masses with poorly-circumscribed margins. 2 cases presented massive calcification and ossification. Significant enhancement was observed in 1 case, while no obvious enhancement was seen in the other 2 cases.MRI: MR images of 5 cases revealed homogeneous iso- or hyper-signal intensity on T1WI and homogeneous or heterogeneous hyper-signal intensity on T2WI. Enhanced MRI revealed homogeneous enhancement in 2 cases and rim enhancement in 1 case.ConclusionsOur findings show that LGMS is characterized by invasiveness, metastases and calcification. Different radiological tools should be employed to make an accurate diagnosis.
Highlights
Low-grade myofibroblastic sarcoma (LGMS) is a rare type of tumor
The participant was initially diagnosed with inflammatory myofibroblastic tumor based on pathological examinations after the first to third surgeries, but was eventually diagnosed with LGMS based on the pathological analyses after the fourth to eighth surgeries
Mammography of advanced-stage breast cancers usually reveals interstitial edema, increased trabecular thickening, opacity of the subcutaneous fat layer and thickening of the skin because of the clogged lymphatic drainage from the cancer cells. These and Conclusions LGMS is a rare type of tumor
Summary
Low-grade myofibroblastic sarcoma (LGMS) is a rare type of tumor. Previous research has paid much attention to reporting pathological analyses of LGMS. Only few systematic clinical and/or radiological studies have been conducted. Low-grade myofibroblastic sarcoma (LGMS) is a rare type of malignant myofibroblastic tumor. Though it may occur to any body part, the most common location is the limbs, head and neck region, the tongue and mouth [1]. Published literature mainly focused on reporting pathological analyses of LGMS, while only few systematic clinical and/or radiological studies of this disease have been conducted. This study recruited 14 cases of LGMS from two hospitals (one of the 14 participants had converted to LGMS from multiple relapses of an inflammatory myofibroblastic tumor). The imaging findings and biological characteristics were different from those of previous
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