Pearls & oy-sters: osteoid osteoma of the scapula masquerading as neuralgic amyotrophy.

• Osteoid osteoma is a benign bone tumor that usually presents in children and young adults characterized by local pain which is worse at night; occasionally the pain is referred to a site distant from the actual lesion. • Osteoid osteoma of the scapula should be considered in the differential diagnosis of neuralgic amyotrophy due to shared clinical features of pain, weakness, and atrophy around the shoulder and upper arm. • Osteoid osteoma is often amenable to cure by minimally invasive procedures particularly in locations like the scapula and pelvis where open surgical procedures could lead to significant complications.