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Case 2

Case 2. Clinical data. 30-year-old male Tumorous mass in the rete testis/epididymis region. Duration 6 months Excision. 1,3 x1,2 x0,8 cm Whitish on cut surphace Immunohistochemistry: EMA, AE1-AE3: positive CEA, CD 34: negative. ????. Caterpillar of moth Actias cf. selenae.

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Case 2

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  1. Case 2

  2. Clinical data • 30-year-old male • Tumorous mass in the rete testis/epididymis region. Duration 6 months • Excision

  3. 1,3 x1,2 x0,8 cm • Whitish on cut surphace • Immunohistochemistry: EMA, AE1-AE3: positive CEA, CD 34: negative

  4. ????

  5. Caterpillar of moth Actias cf. selenae

  6. Our diagnosis Adenomatoid tumor

  7. A very peculiar and constant feature is presence of thin intraluminal bridging strands • Bridging strands are so thin that resembled lipocytes of adipose tissue • Strands bridged lumina of numerous tubular and slit-like structures and formed fine inconspicuous network in some cases. • Bridging strands are present constantly in ATs.

  8. Ultrastructure • Ultrastructurally, bridges are formed by apposition of attenuated cytoplasm of two adjacent cells. • Luminal surfaces are covered by short, narrow, occasionally branched or bushy microvilli confirming their mesothelial origin

  9. Ultrastructure

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