Surgical Treatment of Primary Pulmonary Myopericytoma

Thoracic myopericytoma in an older adult, rare but possible: A case report

Myopericytoma is a rare tumor generally arising from skin and soft tissues of extremities, trunk, head, and neck regions, rarely from visceral sites. An intrathoracic visceral localization may carry a broad differential diagnosis including primary lung, pleura and chest wall lesions, or metastatic lesions. To date, any radiological features have been recognized and diagnosis of myopericytoma with intrathoracic localization remains still challenging. Here, we describe the case of a subpleural lesion incidentally diagnosed in an older adult affected by gastric cancer. Radiological features did not allow a differential diagnosis between a benign lesion, a primary tumor, or a metastasis. After resection, the histological examination showed histopathological features congruent with the diagnosis of myopericytoma. This unusual presentation reflects the need to share clinical, radiological, and histopathological data about this uncommon but frequently misdiagnosed disease.

Myopericytoma arising from myopericytosis-a hitherto unrecognized entity within the lung

Two cases of myopericytosis combined with pericytoma originating within the lung are reported. These are rare pulmonary tumors. The differential diagnosis for hemangiopericytoma and pericytic tumors with glomus elements is discussed. Both myopericytic lesions mimic other lesions, which are more commonly seen in the lung. Based on the expression of vascular growth factor receptors 2 and 3, an antiangiogenic therapy was suggested for the patient with the myopericytoma. A treatment with an angiogenesis inhibitor resulted in a regression of the tumor, but not the precursor lesion. Probably a more specific therapy using tyrosine kinase inhibitors for VEGFR2/3 might better control these myopericytic proliferations.

Myopericytoma of the stomach: report of one case and review of literature

Myopericytoma is an uncommon, slow-growing benign tumour of concentrically distributed perivascular myoid cells, that occurs generally in the skin and superficial soft tissues especially in distal extremities. In the visceral organs, it is particularly rare. We provide the first report of this rare entity in the stomach. A 45-year-male presented to an outside hospital because of pharyngalgia and cough 10 days prior. Endoscopic ultrasonography revealed a 0.92 cm × 0.92 cm hypoechoic lesion in the submucosa of sinuses ventriculi. For further diagnosis and treatment, the patient came to our hospital, and underwent endoscopic submucosal excavation (ESE), without adjuvant therapy. Postoperative pathology was myopericytoma. No recurrence was found in the follow-up of 27 months. In conclusion, myopericytoma is a comparatively newly described disease entity approved by the World Health Organization classification for tumours of soft tissue. The present report shows the first case of myopericytoma of the stomachto remind clinicians and pathologists that myopericytoma may be encountered at this location.