PMC4350833_01
Chest CT reconstructions in the axial, coronal, and sagittal planes (A, B, and C, respectively), showing a heterogeneous pleural mass with areas of low-attenuation (fatty tissue, arrows) in the left lower hemithorax.
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Chest CT revealed a heterogeneous pleural mass in the left lower hemithorax (Fig. 1).
Photograph of the gross specimen (A), demonstrating a well-circumscribed, encapsulated, soft, brown-to-yellow mass measuring 10 x 9 x 5 cm. Below, the photomicrograph (B) shows that, histologically, the tumor consisted of two tumor cell types: cells with granular intense eosinophilic cytoplasm; and clear multivacuolated cells filled with lipid droplets, with no evidence of cellular atypia or mitosis (hematoxylin and eosin staining; magnification, x200).
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The gross specimen showed a well-circumscribed, encapsulated, soft, brown-to-yellow mass, measuring 10 x 9 x 5 cm (Fig. 2A). The microscopic findings were diagnostic of a hibernoma (Fig. 2B).