PT  - JOURNAL ARTICLE
AU  - Gelman, Russell
AU  - Alexander, Michael S.
AU  - Sorandes, Theodore P.
TI  - Extraosseous Metastases Masquerading as Urine Contamination on Bone Scans
DP  - 1991 Jun 01
TA  - Journal of Nuclear Medicine Technology
PG  - 87--89
VI  - 19
IP  - 2
4099  - http://tech.snmjournals.org/content/19/2/87.short
4100  - http://tech.snmjournals.org/content/19/2/87.full
SO  - J. Nucl. Med. Technol.1991 Jun 01; 19
AB  - Urine contamination is probably the most common cause of focal soft-tissue activity in the pelvis, thigh or legs as seen on a radionuclide bone scan. We report two cases of focal soft-tissue activity which were initially thought to represent urine contamination but were later proven to be extraosseous metastases. We present these two cases to illustrate that soft-tissue activity which is presumed to be caused by urine contamination must always be verified by washing off the suspected area and then obtaining an additional image to see if the activity has been removed or persists. This is particularly important in patients with primary malignant bone tumors and in tumors which have a propensity to produce calcification.