34. Metabolism of Ca++, Phosphate, and Magnesium

Question 1

A 10 year old boy shows to the doctor with tetany and paresthesia and muscle cramps. Labs are done notable for low Ca levels. What is a possible cause of his condition?

A. Excessive Vitamin D intake 
B. Paget's Disease
C. Thyrotoxicosis 
D. Digeorge syndrome 
E. Tuberculosis infection 

RFA

Answer 1

Ans. D.- Digeorge syndrome- can cause hypokalemia because part of the Digeorge syndrome is congenital absence of parathyroid glands which causes lack of PTH which causes decrease calcium intake.

All the other choices would cause hypercalcemia