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  • Title: An unusual diagnosis of paravertebral lesions: mediastinal myelolipoma.
    Author: Qin DA, Ren XQ, Zheng S, Bi H.
    Journal: J Int Med Res; 2020 Jul; 48(7):300060520936972. PubMed ID: 32644853.
    Abstract:
    BACKGROUND: Mediastinal myelolipoma is extremely rare. It is a benign nonfunctioning tumor composed of hematopoietic tissue and mature fatty tissue. Although computed tomography and magnetic resonance imaging are effective in diagnosing mediastinal myelolipoma, a definitive diagnosis is difficult to establish for rare extra-adrenal myelolipomas by imaging alone. Such tumors are often misdiagnosed as malignant retropleural liposarcoma, denoting a poor prognosis. Case presentation: We herein describe a 72-year-old man with multiple bilateral paravertebral mediastinal myelolipomas and discuss the imaging findings and differential diagnoses. We used a computed tomography-guided core biopsy to attain a preoperative diagnosis. Using this technique, we avoided an unnecessary surgical procedure for the patient's asymptomatic and relatively small lesions. CONCLUSIONS: Instead of biopsy by lesion excision, we advocate conducting a precisely targeted, minimally invasive computed tomography-guided core biopsy to obtain a definitive preoperative diagnosis and thus avoid unnecessary surgery for mediastinal myelolipoma, a benign nonfunctioning tumor.
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