Background: Myopericytoma is a typically benign, slow-growing soft tissue tumour that originates from pericytes, the contractile cells surrounding blood vessels. While they can appear in both appendicular and axial skeletons, the rarity and indolent nature of the condition can be a clinical challenge. Objective: The purpose of this study is to review the radiological findings of myopericytomas in a series of cases at a tertiary referral centre, identify characteristic imaging patterns and aid in the accurate diagnosis of suspected lesions. Patients and Methods: A retrospective study was conducted and 62 histopathologically proven cases of myopericytoma were identified at our tertiary orthopaedic oncology institution. Of these, 51 cases were included in the final cohort and analysed. Each case was reviewed for patient demographics, lesion morphology and magnetic resonance imaging (MRI) signal characteristics. Results: Of 51 cases, most were located in the subcutaneous soft tissues. All lesions were solitary, with a mean size of 2.06 cm. On imaging, all lesions were isointense to muscle on T1-weighted sequences and hyperintense on fluid-sensitive sequences, exhibiting variable patterns of post-contrast enhancement. No significant signal drop was observed on chemical shift imaging and no diffusion restriction was noted on diffusion-weighted imaging (DWI). Conclusion: Myopericytoma is a rare soft tissue tumour with certain distinctive imaging features which can aid in early recognition and accurate diagnosis.
Pellakuru et al. (Wed,) studied this question.