case_images: PMC11033468_01
case_images: Diagnostic images in canine paraprostatic cyst (Case 1). (A) Computed tomography at first presentation (delayed phase, soft tissue window, transverse plane), (B) magnetic resonance imaging after 4 weeks (T2-weighted transverse plane), (C,D) one-year follow-up computed tomography (delayed phase, soft tissue window, transverse & dorsal plane). The intrapelvic mass-like lesion remained 3.5 cm in size over one-year period but developed calcifications on the capsular region by the end. The right side of the images corresponds to the left side of the patient. P, prostate; black asterisk, mass-like lesion of paraprostatic cyst; white arrow, calcified part of the lesion.
case_images: fvets-11-1270819-g001.jpg
case_images: PMC11033468_01_fvets-11-1270819-g001.jpg
case_images: fig1
case_images: The lesion was located by the enlarged prostate; computed tomography (CT) with contrast study (Figure 1A) revealed a spherical structure with a capsular connection by a stalk but no parenchymal communication with the enlarged prostate (58 x 50 x 36 mm). Four weeks later, magnetic resonance imaging (MRI) showed the prostate size had decreased (31 x 24 x 37 mm) with a hyperintense cystic structure measuring 10 x 3 mm, while the intrapelvic paraprostatic lesion remained unchanged (Figure 1B); it exhibited irregular, heterogeneous, and hyperintense parenchyma surrounded by a thin hypointense capsule, which still had no connection to other organs. However, there were several areas of calcification, mainly in the capsular region (Figures 1C,D).
case_images: Laparoscopic images in complete excision of canine paraprostatic cyst (Case 1). (A) Spheric mass cranio-medial to the left internal inguinal ring, (B) the lesion being dissected from surrounding fat, (C) gross appearance of the cut surface black asterisk, mass-like lesion of paraprostatic cyst surrounded by perivesical fat; white arrow, left internal inguinal ring.
case_images: fvets-11-1270819-g002.jpg
case_images: PMC11033468_01_fvets-11-1270819-g002.jpg
case_images: fig2
case_images: Exploration of the caudal abdomen revealed a spherical mass just cranial to the left internal inguinal ring (Figure 2A). The adipose tissue was peeled off with Maryland forceps or dissected from the mass using a vessel-sealing device (LigaSure; Medtronic, Minneapolis, MN, USA) (Figure 2B). The mass was 3.5 cm in diameter, with a thick, tight, homogeneous capsule, and had a brick-red, mushy sludge-like appearance with a necrotized area on the cut surface (Figure 2C).
case_images: Histopathological images of paraprostatic pseudocyst in 2 dogs. Two intrapelvic cystic lesions were confirmed as pseudocysts histopathologically with an absence of epithelial lining (Hematoxylin and eosin staining, A; case 1, x 20, B: case 2, x 100). In case 2, small foci of glandular ductules represent prostatic glandular tissue (B).
case_images: fvets-11-1270819-g003.jpg
case_images: PMC11033468_02_fvets-11-1270819-g003.jpg
case_images: fig3
case_images: However, there were small foci of glandular ductules bordered by smooth muscle, which may represent prostatic glandular tissue (Figure 3B).
case_images: PMC11033468_02
case_images: Histopathological images of paraprostatic pseudocyst in 2 dogs. Two intrapelvic cystic lesions were confirmed as pseudocysts histopathologically with an absence of epithelial lining (Hematoxylin and eosin staining, A; case 1, x 20, B: case 2, x 100). In case 2, small foci of glandular ductules represent prostatic glandular tissue (B).
case_images: fvets-11-1270819-g003.jpg
case_images: PMC11033468_02_fvets-11-1270819-g003.jpg
case_images: fig3
case_images: However, there were small foci of glandular ductules bordered by smooth muscle, which may represent prostatic glandular tissue (Figure 3B).
case_images: Radiographic images of canine paraprostatic cyst (Case 2) before (A: plain radiograph, B: retrograde contrast cystogram) and after percutaneous aspiration of the cyst (C: retrograde contrast cystogram).
case_images: fvets-11-1270819-g004.jpg
case_images: PMC11033468_02_fvets-11-1270819-g004.jpg
case_images: fig4
case_images: Plain radiography revealed a giant round soft tissue opaque mass that deviated intestines cranially (Figure 4A) and measured 32 cm in diameter. A retrograde positive contrast cystogram showed a compressed urinary bladder being flexed to the caudoventral direction in isolation from the mass (Figure 4B). No direct communication between the urethra and cyst was identified on cystourethrography (Figure 4C).
case_images: Laparoscopic images in partial resection and omentalization of canine paraprostatic cyst (Case 2). (A) Urinary bladder (UB) and dorsally located paraprostatic cyst (pPC) under initial exploration, (B) cystic lesion being aspirated with first percutaneous anchoring suture, (C) neurovascular pedicle between the urinary bladder and the cyst, (D) vas deferens (black arrows) running dorsal surface of the cyst, (E-G) thick, easily bleeding cystic wall being resected with vessel sealing device, notice the right ureter (thick white arrow), (H) paraprostatic cyst after resection completed, (I) intracorporeal suturing between omentum (o) and remaining cuff of the cystic stump (*). Thin white arrow, right internal inguinal ring.
case_images: fvets-11-1270819-g005.jpg
case_images: PMC11033468_02_fvets-11-1270819-g005.jpg
case_images: fig5
case_images: When the caudal abdomen was explored, a pale-pink balloon-like lesion located dorsal to the bladder exhibited a smooth surface (Figure 5).