Three-phase bone scintigraphy in Pellegrini-Stieda disease

Area of Science:

• Radiology
• Nuclear Medicine
• Orthopedics

Background:

• Pellegrini-Stieda disease involves calcification in the medial femoral condyle.
• Diagnosis is typically based on radiographic evidence of calcification.
• Early detection can be challenging with conventional imaging.

Observation:

• A patient with Pellegrini-Stieda disease showed abnormal three-phase bone scintigraphy findings.
• Initial knee radiographs were unremarkable at the time of abnormal scintigraphy.
• Follow-up radiographs revealed typical changes in the untreated knee but remained normal in the treated knee.

Findings:

• The three-phase bone scintigraphy pattern was characteristic of Pellegrini-Stieda disease.
• Radionuclide imaging findings preceded the radiographic evidence of calcification.
• Steroid injection in one knee did not alter the radiographic progression compared to the untreated knee.

Implications:

• Three-phase bone scintigraphy is a valuable tool for the early diagnosis of Pellegrini-Stieda disease.
• This technique allows for earlier intervention and management of the condition.
• Radionuclide imaging may guide treatment decisions in suspected cases before radiographic changes are evident.