RESUMO
Incidental focal FDG uptake in the breast or axilla on PET/CT performed for evaluation of extra-mammary primary disease presents a diagnostic challenge. Radiologists must consider a broad differential diagnosis, assess clinical history, and judiciously employ other imaging modalities such as mammography, ultrasound and MRI in the pursuit of findings which help narrow the differential diagnosis. Tissue sampling may be reserved for nondiagnostic imaging scenarios.
Assuntos
Axila/diagnóstico por imagem , Doenças Mamárias/diagnóstico , Mama/diagnóstico por imagem , Fluordesoxiglucose F18/farmacologia , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada/métodos , Diagnóstico Diferencial , Feminino , Humanos , Compostos Radiofarmacêuticos/farmacologiaRESUMO
The management of hypersensitivity pneumonitis (HP) depends on early identification of the disease process, which is complicated by its nonspecific clinical presentation in addition to variable and diverse laboratory and radiologic findings. HP is the result of exposure and sensitization to myriad aerosolized antigens. HP develops in the minority of antigenic exposures, and conversely has been documented in patients with no identifiable exposure, complicating the diagnostic algorithm significantly. Prompt diagnosis and early intervention are critical in slowing the progression of irreversible parenchymal damage, and additionally in preserving the quality of life of affected patients.