system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Progression of congenital scoliosis is least likely in which of the following veebra anomalies?
assistant
The correct answer is  Block veebra type of scoliosis has the best prognosis. The progression is slow and it can be corrected easily, whereas unilateral thoracic unsegmented type carries worst prognosis. Ref: Ohopaedic Surgery Essentials in Pediatrics By Kathryn E. Cramer, Susan A. Scherl, 2004), Page 65; Campbell's Ohopaedics, 11th Edition, Page 2607.