Multiple primary pulmonary myopericytoma: Case presentation N. Petre * , F. Pop, D. Leonte, S. Bedereag * Medcenter Bucharest, Dept. of Pathology, Romania Objective: Myopericytoma is described as a perivascular myoid tumor which usually develops as a solitary mass in the subcutaneous tissues of the extremities, in adults. Method: The chest radiography of a 52-year-old woman showed multiple, bilateral lung nodules. After the surgical excision of one of them, the histopathologic examination revealed a well circumscribed nodule, composed of fusiform or oval cells, with eosinophilic cytoplasm and ovoid nuclei, without atypia, in a concentric pattern, intimately associated with thin-walled vessels, within a myxoid stroma. Results: The spindle cells were diffusely positive for vimentin, smooth muscle actin (SMA) and occasionally for desmin. CD31 and CD34 were positive only in endothelial cells. Ki 67 was positive in less than 4 % of neoplastic cells. Conclusion: The histological and immuno-histochemical findings led to the diagnosis of multiple primary pulmonary myopericytoma.