USMLE Q Bank Step 1- 209





A 65-year-old man presents with gradual low back pain increasing in intensity for the last six months. X-ray shows several osteoblastic lesions on lower vertebra and pelvic bones. Additional investigations reveal that those lesions are metastases.

Which of these is most likely the primary cancer in this patient?

A-Chronic lymphocytic leukemia

B-Hodgkin’s lymphoma

C-Prostatic cancer

D-Renal cell carcinoma

E-Thyroid follicular carcinoma




Prostatic cancer, besides it is the most common malignant tumor in men after lung cancer, is known also by osteoblastic metastasis to bones, especially the vertebral column.  Other tumors metastasize to the bones in the form of osteolytic lesions.



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