Surgical Treatment of Primary Pulmonary Myopericytoma

Abstract

Myopericytoma is a benign tumor that occurs in soft tissues. Myopericytoma in the lungs is very rare. We report the case of a 63-year-old woman presenting with cavitary masses in the left lung and multiple tiny nodules in both lungs. She underwent surgery, and a histological examination revealed primary pulmonary myopericytoma.

Keywords: Multiple pulmonary nodules; Myopericytoma.

Fig. 1

(A) A low-attenuation cavitary mass-like lesion (1.8×1.9 cm) in the left upper lobe. (B) A homogeneous enhanced nodule and cavitary mass-like lesion (3.5×4 cm) in the left lower lobe, and a tiny nodule in the posterior basal segment of the left lower lobe.

Fig. 2

(A) Grossly, a relatively well-defined, rubbery mass (4.5×2.7×2.5 cm) was identified in the left lower lobe of the lung. The cut surface of the mass was white to tan to pink, fleshy, and solid with cleft-like dilated spaces. In the left upper lobe of the lung, a cystic lesion (2×1×1 cm) was identified without a distinct solid mass-forming lesion. (B) Histopathologic findings of pulmonary myopericytoma, with a concentric perivascular proliferation of ovoid to spindle cells. The tumor cells exhibited bland nuclei and eosinophilic, myoid cytoplasm (H&E stain, ×100).