PMC4232025_01
PMC4232025_02
Chest radiograph showing a homogenous opacity in the right hemithorax
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The chest x-ray revealed homogenous opacity in the right hemithorax (Figure 1).
Contrast-enhanced chest CT showing a heterogenous mass in the right lung with infiltration of the soft parts of the chest wall
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Chest CT imaging (Figure 2) showed a heterogenous mass of 19X13 cm in the right hemithorax with hypodense areas suggestive of necrosis.
Histological examination (HES, X 100): small round tumor cells with scanty cytoplasm. The nuclei are large and hyperchromatic
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CT guided biopsy of the mass was performed, microscopic examination (Figure 3, Figure 4) showed small round tumor cells with scanty cytoplasm in a rare fibrous stroma.
Histological examination (HES, X 400): small round tumor cells with scanty cytoplasm in a rare fibrous stroma. The nuclei are large and hyperchromatic
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CT guided biopsy of the mass was performed, microscopic examination (Figure 3, Figure 4) showed small round tumor cells with scanty cytoplasm in a rare fibrous stroma.
Immunohistochemistrye (immunostaining X 400): diffuse and strong positivity for CD99
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The immunohistochemistry study was strongly positive for CD99 (Figure 5) and NSE, but was negative for cytokeratin (CK), leukocyte common antigen (LCA) (Figure 6) and myogenin.
Immunohistochemistry (immunostaining X 400): negativity for LAC
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The immunohistochemistry study was strongly positive for CD99 (Figure 5) and NSE, but was negative for cytokeratin (CK), leukocyte common antigen (LCA) (Figure 6) and myogenin.