PET/CT uncovers cranial giant cell arteritis

Area of Science:

• Vascular Inflammation
• Nuclear Medicine Imaging
• Rheumatology

Background:

• Giant cell arteritis (GCA) is a vasculitis affecting large and medium arteries, primarily in individuals over 50.
• Timely diagnosis of GCA is crucial to prevent severe complications.
• Corticosteroid therapy is the standard initial treatment upon diagnosis.

Purpose of the Study:

• To present a case of cranial GCA in an elderly male.
• To evaluate the utility of [18F]FDG PET/CT in diagnosing cranial GCA.
• To demonstrate the effectiveness of prompt glucocorticoid treatment.

Main Methods:

• Case report of an 82-year-old male with suspected cranial GCA.
• [18F]FDG PET/CT imaging to assess vascular inflammation.
• Initiation of glucocorticoid therapy based on clinical and imaging findings.

Main Results:

• [18F]FDG PET/CT revealed increased tracer uptake in cranial and medium-sized vessels.
• The patient experienced rapid symptom resolution and normalization of inflammatory markers after treatment.
• The imaging findings correlated with the clinical diagnosis of cranial GCA.

Conclusions:

• [18F]FDG PET/CT imaging is a valuable noninvasive diagnostic tool for cranial GCA.
• Early diagnosis and treatment with glucocorticoids lead to favorable outcomes.
• This case highlights the role of hybrid imaging in managing large vessel vasculitis.