Waldenström sign (hip)
Waldenström sign is the increased distance between the pelvic tear drop and the femoral head. It is a non-specific sign of hip joint effusion.
- >11 mm total distance or >2 mm difference compared to contralateral hip 1, 2
- measured between the lateral aspect of the pelvic tear drop and the medial aspect of the femoral head (referred to as Kohler tear drop distance) 1, 2