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External and Biopsy Determination of Preoperative Tc-99m MDP Femoral-Head Labeling in Fracture of the Femoral Neck: Concise Communication

University Departments of Orthopaedics, Lund, Umeã, and University Department of Nuclear Medicine, Lund, Sweden

Correspondence: For reprints contact: Björn Strömqvist, MD, University Department of Orthopaedics, S-221 85 Lund, Sweden.

ABSTRACT

In 30 fresh fractures of the femoral neck, the preoperative femoral-head tracer uptake in Tc-99m MDP and tetracycline were shown to correlate well. Total absence of Tc-99m MDP uptake in the femoral-head biopsy corresponded to a scintigraphic uptake ratio of 0.7 (fractured over contralateral head), whereas a normal Tc-99m MDP biopsy uptake corresponded to a ratio of 1.5. This suggests that in Tc-99m MDP scintimetry of normal hip, less that half of the emission ascribed to the femoral head is derived from the femoral heal itself.