This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiotherapy, Subject name: Radiology
Tissue or tumor-specific tumor markers are all Except 
Select and explain. 
A. PSA, B. Calcitonin, C. Cathecolamines, D. LDH
D: LDH
Answer: D: LDH 
Explanation: LDH, it is elevated in many hematological malignancies and Ewing&;s sarcoma, it is considered as a representative of tumor burden.Reference: Harrison; 19th edition