Spermatic Seminoma

Gross Features:

• Large mass
• Pale gray, soft cut surface
• Sometimes mucoid cysts

Histologic features:

• 3 cell populations intermixed:
• numerous medium-sized cells with a round nucleus and eosinophilic cytoplasm
• smaller cells with a narrow rim of eosinophilic cytoplasm
• scattered giant cells
• usually no lymphocytes or granulomas
• not associated with ITGCN

Immunophenotype:

Marker:

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Other features: