Bladder defects in newborn foals.

The research investigates and describes bladder defects in newborn foals. The specific defects mentioned are known as bladder rupture and involve an opening extending from near the base to the top of the bladder. The research highlights two examples where the defects were found, drawing attention to shared characteristics, potentially indicating a genetic condition.

Bladder Defect Descriptions

• The authors start by reiterating the works of different researchers on bladder defects in newborn foals since 1952. The defects referred to here are ruptures of the bladder and are typically characterized by an aperture 3-5 cm long that stretches from near the base to the top of the bladder.
• The authors also mention a less common condition of bladder leakage through a small aperture or pervious area near the urachus region.

Case Studies

• The authors present two case studies involving two full-brother colts that exhibited defects on the dorsal wall of their bladders.
• The most recent case was observed six months prior, where the bladder defect was successfully repaired, drawing similarities with the method used by Pascoe in 1971. The foal showed no signs of haemorrhage around the lesion site, the defect edges were rounded, and the epithelium seemed to be absent from the lesion’s margin. There was minimal evidence of peritonitis.
• The earlier case was studied 18 months prior through an autopsy. This colt died on the fifth day after birth. Although examination was more superficial, the nature of the bladder defect appeared similar. This finding led the authors to postulate that this defect could have a genetic link.

Potential Aetiology of Lesions

• The authors then propose the potential causes for the two types of lesions. They suggest that the more common form, termed as the “dorsal rupture”, is most likely a congenital malformation of the bladder that could be linked with other abnormalities.
• The authors question the likely cause of this lesion to be pressure in a full bladder during parturition because the lesions observed didn’t seem traumatic.
• On the other hand, the less common form of the defect, which manifests as bladder leakage, might be associated with a pervious urachus and congenital peritoneal hernia, as outlined by du Plessis (1958) and Pascoe (1971).