1 / 14

Canine Paraprostatic Cyst

Canine Paraprostatic Cyst. Accession #’s: 80443, 80442, and 80468 Christina Copple, DVM April 27, 2009 Radiology Resident NCSU CVM-VTH. Jake 9yr old M German Shepherd. rDVM in June 2007 straining to defecate Prostatomegaly and prostatic cyst were diagnosed

rance
Download Presentation

Canine Paraprostatic Cyst

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Canine Paraprostatic Cyst Accession #’s: 80443, 80442, and 80468 Christina Copple, DVM April 27, 2009 Radiology Resident NCSU CVM-VTH

  2. Jake 9yr old M German Shepherd • rDVM in June 2007 straining to defecate • Prostatomegaly and prostatic cyst were diagnosed • Seen by NCSU CVM-VTH surgery service July 2007 • Still straining to defecate but no difficulty urinating • 6 lb weight loss and diarrhea since June • Enlarged and painful prostate on rectal • Azotemia • HX of arthritis

  3. Soft tissue mass caudodorsal to urinary bladder Accession #80443

  4. Large paraprostatic cyst from right lobe of prostate gland Large, heterogeneous prostate gland Accession #80442

  5. Positive Contrast • Cystourethrogram: • No evidence of communications • between paraprostatic cyst and urethra • Mild prostatic reflux of contrast medium Accession #80468

  6. Canine Paraprostatic Cyst(Renfrew, Barrett, Bradley, and Barr; VetRadUS 49:5, 2008. 444-448) • Relatively uncommon and cause often difficult to determine • Ductal occlusion secondary to squamous metaplasia → progressive secretory stasis (multiple cavitary areas within gland or single large fluid-filled structure in abdomen) • End-stage prostatic hematoma with mineralization of fibrous wall • Originate from uterus masculinus

  7. Canine Paraprostatic Cyst(Renfrew, Barrett, Bradley, and Barr; VetRadUS 49:5, 2008. 444-448) • Mineralization is uncommon but can occur • Differentiate between prostatic retention cysts vs paraprostatic cysts? • Prostatic retention cyst = intimate association with prostate gland, often communicates with the urethra • Paraprostatic cysts = only minimal structural communication with prostate gland, no urethral communication http://www.best-dog-photos.com/images/German-Shepherd-Dog.jpg

  8. Radiographic and Ultrasonographic Features of Canine Paraprostatic CystsRenfrew, Barrett, Bradley, and Barr; VetRadUS 49:5, 2008. 444-448 • Retrospective, 8 dogs, 3-8 yrs of age, all medium to large breed • Boxers (5/8 = 62.5%), 1 each of GSD, German Shorthaired Pointer, and Irish Wolfhound • Clinical signs: • 7 – related to urinary tract and/or defecation (1 – systemic illness, 1 – hindlimb lameness) • 1 – none

  9. Radiographic and Ultrasonographic Features of Canine Paraprostatic CystsRenfrew, Barrett, Bradley, and Barr; VetRadUS 49:5, 2008. 444-448 • Prostatomegaly = craniocaudal dimension of the gland being > 70% of the distance between the sacral promontory to the pubic brim on a lateral radiograph • Radiographically: • All had dorsal displacement of the colon and/or rectum • Displacement of urinary bladder, small intestine • ½ had radiographic evidence of cyst mineralization; pattern of mineralization was varied

  10. Radiographic and Ultrasonographic Features of Canine Paraprostatic CystsRenfrew, Barrett, Bradley, and Barr; VetRadUS 49:5, 2008. 444-448 • Ultrasound was performed in 7 of 8 dogs • All had hyperechoic rims and hypo- or anechoic contents • Other findings: septations, stalk, mineralization • Communication or stalks between the paraprostatic cyst and the prostate gland were identified in 7 of 8 dogs • All 8 dogs had histopathology consistent with paraprostatic cyst

  11. Radiographic and Ultrasonographic Features of Canine Paraprostatic CystsRenfrew, Barrett, Bradley, and Barr; VetRadUS 49:5, 2008. 444-448 Conclusions: • Cyst location was determined by a combination of imaging & surgery • When prostatic cyst was not mineralized contrast radiography was necessary to allow differentiation of cyst from bladder; provides a global view and allows for determination of communication of prostatic cyst with urethra • Ultrasonography is a valuable tool but can be limited if used alone; may not document mineralization if focus of mineralization is <5 mm tall • For complete characterization of prostatic cyst recommend retrograde urethrography and ultrasound • Paraprostatic cyst are frequently mineralized with superior detection via radiography when compared to ultrasound

  12. What about Jake? • Surgery: scrotal ablation, left inguinal herniorrhaphy, resection of paraprostatic cyst and prostatic biopsy • BX = benign cystic prostatic hyperplasia with mild lymphoplasmacytic inflammation • Five days post discharge Jake was doing well at home, recommended recheck ultrasound in 3 months, lost to follow-up http://germanshepherddog.ca/images/funnyface.jpg

  13. Reference • Renfrew, Helen, Esther L. Barrett, Kate J. Bradley, and Frances J. Barr. Radiographic And Ultrasonographic Features Of Canine Paraprostatic Cysts. VetRadUS, 49:5, 2008. 444-448

More Related