RESUMO
F-18 fluorodeoxyglucose positron emission tomography (F-18 FDG PET) has been shown to be useful in the evaluation of many tumors due to its high sensitivity and specificity. However, false-positive interpretations may occur from benign subcutaneous and cutaneous etiologies. At our institution we have encountered FDG-PET scans which demonstrated a variety of cutaneous and subcutaneous lesions including stomas, hernias, rhinophyma, dose infiltrations, physiologic muscle uptake, and tophaceous gout. Additionally, malignant cutaneous and subcutaneous malignant lesions may also demonstrate substantial F-18 FDG uptake on PET scans, including lymphoma, skin metastases, and melanoma. The purpose of this atlas article is to demonstrate and review key features of various cutaneous and subcutaneous lesions, both benign and malignant, which can result in hypermetabolism on FDG-PET or PET-CT scans.
Assuntos
Fluordesoxiglucose F18 , Neoplasias/diagnóstico por imagem , Tomografia por Emissão de Pósitrons , Pele/diagnóstico por imagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Cuidados Pós-Operatórios , Tomografia Computadorizada por Raios X , Imagem Corporal Total , CicatrizaçãoRESUMO
Bronchobiliary fistulas are rare, may result from infection with Echinococcus or Amebiasis, trauma, or hepatic malignancy, and present with biliptysis, the expectoration of bile. The authors present a 49-year-old woman who presented with frank biliptysis as a result of previously treated metastatic colon cancer to the liver. A hepatobiliary scan is the noninvasive diagnostic imaging test of choice for demonstration of such fistulas, and was useful in confirming the diagnosis in our patient.
