Urine-Filled Large Prostatic Cystic Structure in Two Unrelated Male Miniature Dachshunds

Abstract

A 1 yr old intact male miniature dachshund presented for posturing to urinate without voiding and nocturia. Physical examination revealed congenital reproductive abnormalities and a fluid-filled structure caudal to the urinary bladder. The dog was diagnosed with a prostatic cyst and underwent an exploratory laparotomy with an attempt to remove the cyst. Twelve weeks later, the dog returned with recurring clinical signs, and the cyst was found to have returned back to its original size. A second intact male miniature dachshund presented at 7 mo of age for stranguria. Physical examination revealed congenital reproductive abnormalities and a fluid-filled structure on rectal palpation, much like the first dog. The dog was diagnosed with a prostatic cyst and underwent an exploratory laparotomy. An attempt was made to close communication between the prostate and cyst. The dog re-presented 3 wk later for recurrence of clinical signs, and the prostatic cyst was found to have increased in size. Both dogs were euthanized because of recurrence of clinical signs. This report describes the presence of prostatic cysts in two young dogs with congenital abnormalities of the genital and reproductive tracts and the similarities seen in human boys diagnosed with prostatic utricles.

Surgical treatment and outcome of sterile prostatic cysts in dogs

“…This major intraoperative complication was resolved during surgery and no evidence of urine leakage was observed in the postoperative abdominal ultrasound examination. It is unclear if the urethral wall ruptured during the surgical procedure or an abnormal communication between the urethra and the cyst was already present, as has already been reported in the literature, 7 , 8 which was then enlarged during the surgical maneuvers. The urethral defect was sutured, and a Foley catheter placed, 8 but the dog died after 2 days postoperatively due to AKI.…”

“…Intraparenchymal cysts (previously called retention cysts) are believed to originate from microcysts, with an accumulation of prostatic gland secretions due to increased production or obstruction of the ducts during BPH 5,6 . They can also contain urine and have a connection with the urethra 7,8 . Extraparenchymal cysts (previously called paraprostatic cysts) have a connection with the prostatic capsule, but they do not involve the prostatic parenchyma 5 .…”

“…5 , 6 They can also contain urine and have a connection with the urethra. 7 , 8 Extraparenchymal cysts (previously called paraprostatic cysts) have a connection with the prostatic capsule, but they do not involve the prostatic parenchyma. 5 They are thought to be associated with the Müllerian duct remnant, 6 although this finding has never been proven.…”

“…At present, surgery for PCs is recommended as a definitive treatment or in cases of recurrence after the use of minimally invasive procedures 5 . Only one case series has described the surgical management of PC in 18 dogs followed during a medium to long‐term follow‐up 17 ; most of the remaining veterinary literature includes studies dealing with only small numbers of dogs followed for a short period of time (range from no follow‐up to 24 months, with only 7 dogs followed for more than 5 months) 7,8,10,18 …”

Case report: Persistent Müllerian duct syndrome and enlarged prostatic utricle in a male dog

“…Several cases of prostatic cystic dilations communicating with the urethra and containing urine have been described in dogs ( 23 , 24 ). However, none of the cases have been associated with PMDS and urometra, as in this case.…”