Doughnut sign of hepatic alveolar echinococcosis on FDG PET/CT: Clinical case report.

Authors:
Guohua Shen
Guohua Shen
East China Normal University
China
Ying Kou
Ying Kou
West China Hospital of Sichuan University
Nanchong Shi | China
Anren Kuang
Anren Kuang
Sichuan University
China

Medicine (Baltimore) 2019 Feb;98(8):e14561

Department of Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, People's Republic of China.

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.

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Source
http://dx.doi.org/10.1097/MD.0000000000014561DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6408036PMC
February 2019
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