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Figure 2 | Diagnostic Pathology

Figure 2

From: Primary pulmonary primitive neuroectodermal tumor metastasis to the pancreas: a rare case with seven-year follow-up

Figure 2

Histologic features of the tumor in the lung and pancreas. a) The pulmonary tumor cells had round or oval nuclei, a fine chromatin pattern, and indistinct cytoplasm and nucleoli. Mitotic activity was very high (HE, 400Ă—). b) The pulmonary tumor cells showed a consistent and strong membranous expression of CD99 (SP, 400Ă—). c) Diffusely infiltrative tumor cells were present in the pancreas parenchyma (HE, 200Ă—).

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