PMC2820284_01
(a) CT scan revealing a nonspecific nodule in the right upper lobe (arrow). (b) Contrast enhanced CT in prone position shows right pleural effusion (arrowhead) and bilateral sub pleuralthickening (arrow) in the region of the 9th vertebrae.
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fig1
A contrast enhanced CT revealed a nonspecific 1.5 cm pulmonary nodule in the right upper lobe (Figure 1(a)), right pleural effusion, and bilateral latero-spinal subpleural thickening in the region of the 9th vertebra (Figure 1(b)).
At histological examination, the pulmonary nodule was centered by an area of necrosis, surrounded by a palissade of histiocytes, sometimes giant and multinucleated. Elastic stain enlightens the elastic lamnia, partially destroyed by this granulomatous inflammation (Elastic Stain, original magnification x200).
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fig2
The pulmonary specimen contained a central necrotic nodule, surrounded by palissading histiocytes (Figure 2).