Scintigraphic findings of growing herniation pits of the femoral neck during serial follow-up studies.

Herniation pit is a common radiographic lesion of the femoral neck. It may increase in size in patients with a history of physical athletic activity. Bone scintigraphy usually shows no increased uptake; however, increased uptake can be seen during active bone remodeling and repair in the lesion. We describe a 48-year-old woman with a history of breast cancer but without athletic activity, who had focally increased uptakes in both femoral necks only on bone scintigraphy performed at the time when the herniation pits were initially detected on a CT scan. Although the lesions enlarged progressively over a period of 3.6 years, increased uptake was no longer observed on follow-up studies.