This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
All of the following malignancies present with osteoblastic secondaries, except 
Select and explain. 
A. Multiple myeloma, B. Ca prostate, C. Ca breast, D. Carcinoid tumor
A: Multiple myeloma
Answer: A: Multiple myeloma 
Explanation: Multiple myeloma commonly presents as multiple osteolytic lesions in older patients and may simulate metastatic cacinoma. Carcinomas which present with osteoblastic secondaries are prostate carcinoma, breast carcinoma, seminoma, neurogenic tumors and carcinoid. Reference: Bone and Soft Tissue Pathology By Andrew L. Folpe, page 452.