Myopericytoma occurrence in the liver and stomach space: imaging performance

Abstract

BackgroundMyopericytoma is a rare and usually benign tumor, which is even rarer if it occurs in the liver and stomach space. Previous reports of myopericytoma were mostly related to its pathological manifestations, while imaging reports were rare. Here, we report the computed tomography (CT), computed tomography angiography (CTA) and magnetic resonance imaging (MRI) performance for one deep myopericytoma.Case presentationIn this study, one deep myopericytoma in the liver and stomach space is reported. A CT that was not contrast-enhanced showed a lobulated tumor with heterogeneous density, and a contrast-enhanced CT showed that the mass had progressive enhancement. CTA showed that the blood-supply of the tumor was supplied by the anterior superior pancreaticoduodenal artery and the left gastric artery. An MRI showed the lesion had isointensity on T1-weighted imaging (T1WI) and slight hyperintensity on T2-weighted imaging (T2WI). The lesion MRI enhancement characteristics were similar to the characteristics from the contrast-enhanced CT. In this case, the enhancement pattern of the tumor was the centrifugal enhancement for both the contrast-enhanced CT and MRI. After surgical resection of the tumor, the pathological diagnosis was myopericytoma, and there was no recurrence in a short-term follow-up.ConclusionThe myopericytoma generally has a rich blood supply. When there is necrosis in the center lesion, the lesion has peripheral enhancement. Abdominal myopericytoma could be categorized as having centrifugal enhancement.

Imaging features of myopericytoma of the breast: A case report and review of the literature

“…Most previous case reports on myopericytomas have focused on the clinical and pathological features, and only a few have described imaging findings. We summarize the imaging features for myopericytoma in the previous case reports [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] . Ultrasonography is considered a widely available, noninvasive, and relatively inexpensive diagnostic tool.…”

“…On ultrasonography examination, the masses were well-circumscribed with hypoechoic echogenicity and demonstrated prominent color signals on Doppler imaging [11] , [12] . CT has obvious advantages for evaluation of tumors invading ambient structures [11 , 14 , 17] . Chu et al.…”

“… [17] reported a case of myopericytoma that occurred in the parotid gland and CT examination demonstrated multiple smooth-margined and well-defined nodules in the periparotid areas and parapharyngeal spaces. On conventional MRI, the lesions usually appeared hypointense on T1-weighted sequences and hyperintense on T2-weighted sequences [12] , [13] , [14] , [15] . FDG-PET/CT is conducive for detection of any evidence of distant metastatic disease.…”

Surgical Treatment of Primary Pulmonary Myopericytoma

“…The lesion can appear as a single round, oval, or irregular shape and can be solitary or multiple. Because this radiologic pattern is similar to that of tuberculosis or aspergilloma, a differential diagnosis should be made to distinguish among these possibilities, especially if small nodules are present in both lungs [ 7 ]. Although there are limitations due to the small number of cases, these masses mainly take the clinical form of benign tumors, and recurrence or metastasis is uncommon [ 8 ].…”

“…Although there are limitations due to the small number of cases, these masses mainly take the clinical form of benign tumors, and recurrence or metastasis is uncommon [ 8 ]. However, as the size of the tumor can greatly increase over time, early resection is recommended [ 7 ]. In a case of pulmonary myopericytoma reported by Song et al, a patient who received conventional care after surgical resection made a full recovery without any symptoms at a 3-year follow-up visit [ 6 ].…”