Findings: Following the intravenous administration of 27.3 mCi of Technetium 99m MDP, a delayed planar image in the anterior projection over the pelvis is submitted.

An abnormal focus of increased radiopharmaceutical activity is seen along the superior aspect of the bladder on the left.

Diagnosis: Calcified uterine fibroids.

Discussion: There are multiple causes for extraosseous activity on bone scan. This can be divided into generalized or localized soft tissue activity. Generalized activity is usually secondary to renal failure.

Localized soft tissue activity has multiple causes and can be due to any process that produces soft tissue calcification. Pulmonary as well as gastric calcifications can be seen in hyperparathyroidism. In addition, tumoral calcinosis can occur especially mucinous malignancies. Tissue infarction, hematoma formation, as well as dermatomyositis can cause soft tissue calcification.

A CT scan confirmed calcified uterine fibroids.

References:
Mettler FA, Jr., Guiberteau MJ. Essentials in Nuclear Medicine Imaging, 4th Edition.
Philadelphia, W.B. Saunders Co., 1998:299-311.

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