case_images: PMC4290074_01
case_images: Magnetic resonance imaging (MRI) of the thigh demonstrated a well-defined soft tissue lesion in the left rectus femoris muscle with homogenous low signal intensity on T1-weighted sequences (a) and markedly high signal intensity on T2-weighted sequences (b). Contrast-enhanced MRIs showed heterogeneous enhancement throughout the mass (c)
case_images: IJNM-30-75-g001.jpg
case_images: PMC4290074_01_IJNM-30-75-g001.jpg
case_images: F1
case_images: T1-weighted MRIs showed heterogeneous enhancement throughout the mass [Figure 1]. The differential diagnosis based on imaging findings was IM and myxoid liposarcoma.
case_images: Increased fluorodeoxyglucose uptake was noted in the left upper thigh on maximum intensity projected (a), coronal positron emission tomography (PET) (b) and sagittal PET (e) images. This uptake corresponds to the peripheral rim of a well circumscribed centrally hypodense soft tissue lesion with thin septation in the left rectus femoris muscle on correlative coronal and sagittal computed tomography (CT) images (c and f) and PET-CT images (d and g), respectively
case_images: IJNM-30-75-g002.jpg
case_images: PMC4290074_01_IJNM-30-75-g002.jpg
case_images: F2
case_images: Increased F-18-FDG uptake was noted in the peripheral rim of a well-circumscribed centrally hypodense soft tissue lesion with thin septation in the left rectus femoris muscle [Figure 2].