Diagnostic Difficulties in Bone Sarcoidosis Imaging. A Cases Study

Area of Science:

• Rheumatology
• Radiology
• Oncology

Background:

• Sarcoidosis is a systemic inflammatory disease affecting multiple organs.
• Musculoskeletal involvement in sarcoidosis is uncommon, with typical radiographic findings limited to phalangeal lesions.
• Diagnosing skeletal sarcoidosis beyond the hands and feet presents significant imaging challenges.

Observation:

• Two cases of bone sarcoidosis with pathologic bone marrow lesions detected via MRI are presented.
• MRI findings were non-specific, mimicking metastatic disease or multiple myeloma.
• This highlights the limitations of imaging in diagnosing bone sarcoidosis.

Findings:

• Non-specific MRI findings in bone sarcoidosis can lead to suspicion of malignancy.
• Accurate diagnosis necessitates a multidisciplinary approach, integrating clinical and radiological data.
• Imaging plays a crucial role in lesion localization, biopsy guidance, and monitoring treatment response.

Implications:

• Emphasizes the need for close collaboration between radiologists and clinicians for accurate bone sarcoidosis diagnosis.
• Suggests that MRI's primary role in bone sarcoidosis is not definitive diagnosis but rather lesion identification and management guidance.
• Underscores the diagnostic difficulties posed by rare presentations of sarcoidosis in the skeletal system.