<prompt> A 10 year old boy has a fracture of femur. Biochemical evaluation revealed Hb 11.5 gmdL and ESR 18 mm 1st hr. Serum calcium 12.8 mgdL, serum phosphorus 2.3 mgdL, alkaline phosphate 28 KA units and blood urea 32 mgdL. Which of the following is the most probable diagnosis in his case?Nutritional ricketsRenal ricketsHyperparathyroidismSkeletal dysplasia  <response>: The patient in question has an increased serum Ca, decreased serum phosphorus and increased values of alkaline phosphatase, suggests hyperparathyroidism. Ref: Clinical Proceedings - Childrens Hospital of The District of Columbia, Volume 14 ; Nutrition and Diagnosis-Related Care By Syl Escott-Stump - 2008, Page 193 ; Averys Diseases of The Newborn BY H. William Taeusch, Robea A. Ballard, Christine A. Gleason - 2005, Page 1359 