PMC4642454_01
Chest enhanced CT images (a, d lung parenchyma window; b, c, e, f mediastinal window). a-c Diffuse air-space consolidation in the right lung with ipsilateral pleural effusion and massive mediastinal and hilar lymphadenopathy (arrows) at admission. d-f Disappearance of consolidation, pleural effusion and lymphadenopathy after the treatment
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Fig1
Chest X-ray and enhanced computed tomography (CT) showed diffuse air-space consolidation in the right lung with ipsilateral pleural effusion and massive mediastinal and hilar lymphadenopathy (Fig. 1a-c). Follow-up chest CT showed no consolidation, pleural effusion and lymphadenopathy (Fig. 1d-f).
Pathological findings of mediastinal lymph nodes (a, b hematoxylin and eosin staining: c immunohistochemical staining). a Irregular necrotic areas consisted of debris and intense karyorrhexis. b Prominent histiocytic cells admixed with plasma cells, large lymphocytes and immunoblasts around necrotic areas without neutrophils. c Positive stain for CD68 on histiocytic cells
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Fig2
Immunohistochemical studies showed histiocytic cells were strongly positive for CD68 (Fig. 2a-c).