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Doughnut sign of hepatic alveolar echinococcosis on FDG PET/CT: Clinical case report.
Medicine (Baltimore) 2019 Februrary
RATIONALE: A characteristic metabolic finding of hepatic alveolar echinococcosis (HAE) on positron emission tomography/computed tomography (PET/CT) correlates with morphologic features on CT and magnetic resonance imaging (MRI).
PATIENT CONCERNS: A young man from an endemic area was admitted to our hospital due to right upper quadrant pain for 2 months.
DIAGNOSIS: CT and MRI revealed a heterogeneous mass with calcification, consisting of central necrosis and peripheral solid inflammatory tissues. Accordingly, FDG PET/CT demonstrated a characteristic metabolic finding of doughnut sign. Combining the above characteristic imaging features with positive serologic findings, the patient was diagnosed as HAE.
INTERVENTIONS: He then underwent extracorporeal hepatectomy and liver autotransplantation followed by medical treatment of benzimidazoles.
OUTCOMES: He remained asymptomatic without evidence of recurrence at 2-year follow-up.
LESSONS: The characteristic metabolic appearance of HAE on FDG PET/CT, correlated with its morphologic features of CT and MRI, may allow to make accurate diagnoses.
PATIENT CONCERNS: A young man from an endemic area was admitted to our hospital due to right upper quadrant pain for 2 months.
DIAGNOSIS: CT and MRI revealed a heterogeneous mass with calcification, consisting of central necrosis and peripheral solid inflammatory tissues. Accordingly, FDG PET/CT demonstrated a characteristic metabolic finding of doughnut sign. Combining the above characteristic imaging features with positive serologic findings, the patient was diagnosed as HAE.
INTERVENTIONS: He then underwent extracorporeal hepatectomy and liver autotransplantation followed by medical treatment of benzimidazoles.
OUTCOMES: He remained asymptomatic without evidence of recurrence at 2-year follow-up.
LESSONS: The characteristic metabolic appearance of HAE on FDG PET/CT, correlated with its morphologic features of CT and MRI, may allow to make accurate diagnoses.
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