A 2mm perimembranous VSD refers to a tiny opening in the heart. Whereas, right renal dysplasia signifies improper formation of the right kidney. Occasionally, the hole might naturally close as the baby develops further. However, if it persists, surgical intervention may be needed once the baby grows older. The likelihood of surgery depends upon the baby's progress over time. Ensure regular follow-ups with your doctor to provide optimal care for your baby.