Abdominal hibernoma is a rare slow-growing tumor originating from brown adipose tissue. Due to its rarity, only a few case reports have been published so far. Pelvic localization is anedoctal and preoperative differential diagnosis with other malignancies may be challenging. We present the case of a woman who, due to a lower abdominal pain, underwent an abdominal ultrasonography with diagnosis of a 15 cm hyperechogenous pelvic mass. A subsequent MRI showed a 16 × 5.8 × 7.8 cm3 lesion anterior to the left iliacus muscle, with an intra- and extrapelvic component longitudinally extending from the left anterior superior iliac spine until the lesser trochanter. Surgical resection was performed and final histopathology was consistent with hibernoma. This report emphasizes the necessity to include hibernoma among differential diagnosis when a retroperitoneal abdominal mass is diagnosed and the difficulty to perform preoperatively this diagnosis due to the extreme rarity of these neoplasms.
展开▼
机译：腹部纤维瘤是一种罕见的缓慢生长的肿瘤，起源于棕色脂肪组织。由于其稀有性，到目前为止，仅发表了几例病例报告。盆腔定位术是一剂麻醉剂，术前与其他恶性肿瘤的鉴别诊断可能具有挑战性。我们介绍了一名妇女的情况，该妇女由于下腹部疼痛而接受了腹部超声检查，诊断为15 cm高回声性骨盆肿块。随后的MRI显示左骨肌前部有一个16×5.8×7.8 cm 3 病变，骨盆内和骨盆外部分从左前上棘纵向延伸至小转子。进行了手术切除，最终的组织病理学与冬眠瘤一致。该报告强调，在诊断腹膜后腹块时，必须在鉴别诊断中包括子宫肌瘤，并且由于这些肿瘤的罕见性，术前难以进行此诊断。
展开▼
