Oliver V. Rosales MD., Neonatal and Pediatric Surgeon

24/11/2025

22/11/2025

Recto-va**nal fistula is a very rare congenital anomaly, Dr. Peña refers to it as almost non-existent. The re**um opens in the posterior wall of the va**na. The prognosis for bowel control is excellent, provided the patient has normal sacrum, no tethered cord, and receives a technically good operation.
Patients with recto-vestibular fistula (most common anore**al malformation in females) are frequently misdiagnosed as recto-va**nal fistula.
**alMalformation

22/11/2025

How do you know if the a**s is normal in a newborn?
The a**s should be located in the center of the sphincter. In girls there should some skin (perineal body) between the va**na and the a**s. A full term newborn should be able to accommodate a number 12 Hegar during clinical examination (awake, not under anesthesia). If in doubt, caliber it with a Hegar dilator.
Together we can Improve Colore**al Care Everywhere for Everyone!

17/11/2025

Primary Pull-Through for Hirschsprung Disease in neonatal period

13/11/2025

After having a child with Hirschsprung’s disease, it is common that parents are afraid of having another child with the same diagnosis.
For the most common type of Hirschsprung’s disease (rectosigmoid) the chances are extremely low for recurrence in siblings and in the next generation.
The highest chance of recurrence happens in patients with very long segments or total colonic aganglionosis.
Together we can Improve Colore**al Care Everywhere for Everyone!

19/09/2024

Myth: The finding of no ganglion cells in a re**al biopsy equals Hirschsprung disease.

Reality: Human beings have a normal aganglionic zone near the a**s, therefore, a biopsy done too low may not find ganglion cells and that does not mean that the patient has Hirschsprung disease.

19/09/2024

Tethered Cord happens in 25% of patients born with an anore**al malformation.
Normally, the spinal cord should be floating freely inside the spinal canal, and the conus medularis should end above L2. When it is below L2, and it is attached to the bone and other surrounding tissues, we call it tethered cord.
Having tethered cord seems to influence more the urinary tract than the gastrointestinal tract.
Together we can improve colore**al care everywhere for everyone!