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  • Title: Primary splenic epithelioid hemangioendothelioma with diffuse metastases revealed by FDG PET/CT imaging: A case report.
    Author: Li X, Ma X, Hao J, Dong C, Wang Y.
    Journal: Medicine (Baltimore); 2021 Apr 02; 100(13):e25065. PubMed ID: 33787588.
    Abstract:
    RATIONALE: Epithelioid hemangioendothelioma (EHE) is a rare low-to-intermediate grade malignant vascular neoplasm. We report a primary splenic EHE with diffused metastasis who underwent 18F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT). Our case emphasizes that EHE should be considered a differential diagnose of 18F-FDG-avid splenic malignancies. PATIENT CONCERNS: A 39-year-old man presented with abdominal distension and chest distress for 20 days and lumbago for 2 days. Transthoracic echocardiography suggested a large amount of pericardial effusion. Contrast-enhanced CT imaging showed splenomegaly with multiple low-density nodules with ring enhancement. A large irregular mass was also found in the right superior mediastinum with heterogeneous density and enhancement. 18F-FDG PET/CT imaging revealed splenomegaly, filled with intense hypermetabolic nodules and masses. And multiple regions of increased 18F-FDG uptake were observed in the mediastinum, left pleura, and bones. DIAGNOSIS: EHE of the spleen. INTERVENTIONS: Half a month after the diagnosis was confirmed, the patient then underwent chemotherapy, Docetaxel combined with carboplatin, and Endu were administrated every 3 weeks. OUTCOMES: During the 6-month follow-up period, the patient has finished 4 cycles of chemotherapy combined with 2 months of targeted drug. Efficacy assessment is partial remission through CT imaging, and clinical symptoms of patient improved significantly. LESSONS: Primary splenic EHE is extremely rare, especially with diffuse systemic metastasis. Our report suggested that EHE should be considered a differential diagnosis of 18F-FDG-avid splenic malignancies. Furthermore, 18F-FDG PET/CT plays critical role in staging and accessing disease extent of EHE.
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