Question

58-year-old male with buttock pain. what is the most likely diagnosis? a) lymphoma b) chondrosarcoma c) ewing sarcoma d) osteoblastoma e) metastasis

Explanation:

1. Lymphoma typically presents with lymphadenopathy, not isolated buttock pain as the primary symptom.
2. Chondrosarcoma is a primary bone tumor, less common than metastatic disease in this age group, and not the top cause of isolated buttock pain here.
3. Ewing sarcoma almost exclusively affects children and young adults, making it extremely unlikely in a 58-year-old.
4. Osteoblastoma is a rare, benign bone tumor that most often affects younger individuals, not older adults.
5. Metastatic bone disease is very common in older adults (58 years old), and the buttock region can be involved by metastatic lesions to the pelvic bones or sacrum, which present with localized pain. This is the most probable diagnosis among the options.

Answer:

E) metastasis