PMC9731857_01
Radiographic images of the abdomen and pelvis. The IVP shows bilateral hydroureteronephrosis (a, b, c). Non-contrast CT scan in axial plane shows ectopic insertion of a septated cystic structure to the lateral wall of the bladder (d, arrows). The ultrasonographic image shows a cyst adhered to the lateral inner surface of bladder wall (e, arrow).
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The computed tomography (CT) scan with and without intravenous contrast revealed ectopic insertion of a cystic structure to the UB wall, occupying the left-lateral inner surface (Fig. 1).
Low and high-power microscopic images of EG cyst and bladder wall [Hematoxylin and Eosin (H&E) stained sections]. Low power image of cyst shows acellular laminated layer (1, arrow) with a nucleated germinal membrane (2, arrow) (a). High power image of the cyst shows brood capsule (3, arrow) which arises from the germinal membrane, and Protoscolices surrounded by brood capsule (4, arrows) with visible hooklets (5, arrows) (b). High power images of the bladder wall show transmural eosinophils infiltration (c) surrounding detrusor muscle fibers (6, arrow) (d).
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The inner membrane of the cyst also showed numerous oval-shaped Protoscolices with hooklets budding from the membrane (Fig. 2). Sections of the UB revealed acute phase of eosinophilic cystitis exhibiting transmural dense infiltration of eosinophiles, as shown in the (Fig. 2).