Incidental Tc-99m Methylene Diphosphonate Uptake in an Active Thyroid Nodule

Area of Science:

• Nuclear Medicine
• Oncology
• Radiology

Background:

• Tc-99m-methylene diphosphonate (MDP) whole body scintigraphy is the gold standard for detecting metastatic bone disease.
• Bone scans are crucial for diagnosing bone cancers, inflammation, fractures, infections, and evaluating treatment response in malignancies like prostate and breast cancer.

Purpose of the Study:

• To present an unusual incidental finding on a Tc-99m MDP whole body bone scan.
• To highlight the potential for detecting non-skeletal pathologies during bone scintigraphy.

Main Methods:

• Tc-99m-MDP whole body scintigraphy was performed.
• Diagnostic imaging interpretation was conducted.

Main Results:

• The bone scan revealed expected findings related to prostate cancer staging.
• An incidental finding of an active thyroid nodule with Tc-99m MDP uptake was observed in a prostate cancer patient.

Conclusions:

• Whole body bone scintigraphy can reveal incidental findings in other organ systems.
• Active thyroid nodules may demonstrate Tc-99m MDP uptake, a finding not typically associated with bone scintigraphy.