My husband 41 years has a swollen sack inside the bone of the ankle.in report they called it osteod osteoma .explain please i am so desperate...

Osteoid osteoma: Osteoid osteomas are benign bone tumors. They have a classic presentation of pain at night that is relieved within 20-30 minutes after use of an anti-inflammatory. Typically they resolve on their own but may require surgical treatment if the patient desires quicker relief. I would recommend evaluation by your physician to decide the best course of action.

Benign but painful: Ostoid osteoma is a benign(non cancerous) tumor of the bone. It has a specific look on mri, ct scans and bone scans. It is a small area of increased vascularity that classically hurts more at night and is relieved by taking Aspirin like compounds. Its natural is history is that it will eventually go away on its own with 5-7 years .It can be removed surgically or with focused radiofrequency ablati.