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Hemivertebral "Disappearance" on Bone Scan

University of Connecticut Health Center, Farmington, and Hartford Hospital, Hartford, Connecticut

Correspondence: For reprints contact: Richard P. Spencer, MD, PhD, Dept. of Nuclear Medicine, Univ. of Connecticut Health Center, Farmington, CT 06032.

ABSTRACT

Two cases are described in which there was absence of uptake in a hemivertebra on a Tc-99m methylene diphosphonate bone scan. In one of these patients, the bone image had been normal 56 days previously. Radiographs of the vertebrae were normal in both cases. Data are presented suggesting that the findings can most probably be explained in terms of compromise of blood supply to the hemivertebra; each half of a vertebra usually has a separate arterial contribution.