Assessing Cutaneous Psoriasis Activity Using FDG-PET: Nonattenuation Corrected Versus Attenuation Corrected PET...

Area of Science:

• Nuclear Medicine
• Dermatology
• Inflammatory Diseases

Background:

• Psoriasis is a chronic inflammatory skin disease.
• Inflammatory cell infiltration and epidermal proliferation characterize psoriatic lesions.
• These processes can lead to increased fluorodeoxyglucose (FDG) uptake.

Observation:

• A case study of a 55-year-old patient with a 30-year history of psoriasis is presented.
• Significant cutaneous FDG uptake was observed in nonattenuation corrected PET/CT images, correlating with psoriatic lesions.
• In contrast, attenuation corrected (AC) FDG-PET images showed markedly diminished FDG signal.

Findings:

• Nonattenuation corrected PET/CT images revealed substantial FDG uptake in psoriatic skin lesions.
• Attenuation corrected PET/CT images demonstrated minimal to no detectable FDG signal in the same lesions.
• This highlights a significant difference in image interpretation based on attenuation correction.

Implications:

• Nonattenuation corrected FDG-PET imaging may be a valuable tool for assessing skin inflammation in psoriasis.
• This technique could offer a more sensitive method for evaluating disease activity compared to AC images.
• Further research is warranted to validate the utility of non-AC FDG-PET in managing psoriasis.