PMC7986722_01
(A) Ultrasound examination of the scrotum revealed a mainly cystic, heterogeneous echogenic mass occupying most of the left testicle. The tumor had a clear boundary, regular morphology, and disordered internal echo. (B, C) Viscous fluid was seen in the cystic part, and large calcified spots were detected in some areas. (D) A few irregular solid protrusions were visible on the cyst wall with a small blood supply.
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The tumor had a clear boundary, regular morphology, and disordered internal echo ( Figure 1A ). Viscous fluid was seen in the cystic part, and large calcified spots were detected in some areas ( Figures 1B, C ). A few irregular solid protrusions were visible on the cyst wall with a small blood supply ( Figure 1D ).
(A) Gross pathology showed that the multilocular cystic mass in the left testis occupied almost the entire testicular parenchyma (volume about 4.5x3.5x2.5 cm) with irregular thickening of the cyst wall and filled with gray-yellow jelly. (B) Microscopic pathology (hematoxylin and eosin staining x200) showed that the inner wall of the capsule was lined with a single layer of pseudo-stratified mucus columnar epithelial cells, some showing mild nuclear atypia, but with no interstitial infiltration. (C) Microscopic pathology (hematoxylin and eosin staining x20) also showed fibrous tissue proliferation of the cyst wall and mucus overflow into the cyst wall in some areas.
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Postoperative gross pathology showed a multilocular cystic mass in the left testis measuring about 4.5x3.5x2.5 cm and occupying almost the entire testicular parenchyma, with irregular thickening of the cyst wall and filled with gray-yellow jelly ( Figure 2A ). There was also fibrous tissue proliferation of the cyst wall and mucus overflow into the cyst wall in some areas ( Figures 2B, C ).