This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolic disorders - 1, Subject name: Orthopaedics
Which of the following finding is not seen in this condition? 
Select and explain. 
A. Osteopenia, B. Renal stones, C. Punched out lesion of skull, D. Brown tumour
C: Punched out lesion of skull
Answer: C: Punched out lesion of skull 
Explanation: Above condition is hyperparathyroidism, Image showing Brown tumor Punched out lesion of skull is not seen in hyperparathyroidism it's a feature of Multiple myeloma Salt pepper skull is a feature of hyperparathyroidism