BACKGROUND Müllerian adenosarcoma is a rare malignancy. These tumors occur mainly in the uterus, but also in extrauterine locations, usually related to endometriosis. Because of their rarity, there is limited data on optimal management strategies. CASE PRESENTATION We present a 44-year-old woman with a history of endometriosis who consults for chronic pelvic pain. In the imaging tests, a heterogeneous mass is observed that impresses endometriosis, encompassing the uterus and left appendage. Surgery is performed by finding an extrauterine adenosarcoma that affected the uterus, ovary and bladder wall. CONCLUSION This is a rare case but should be considered in a patient with atypical clinical characteristics or preoperative pathology, so we show the diagnostic and therapeutic strategies carried out for the resolution of the case.

中文翻译：

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诊断挑战：深部子宫内膜异位症的低度腺肉瘤。

背景缪勒氏腺肉瘤是一种罕见的恶性肿瘤。这些肿瘤主要发生在子宫中，但也发生在子宫外部位，通常与子宫内膜异位症有关。由于它们的稀有性，因此关于最佳管理策略的数据有限。病例介绍我们介绍了一位有子宫内膜异位病史的44岁女性，她正在就慢性骨盆痛进行咨询。在影像学检查中，观察到了异质性肿块，压迫子宫内膜异位症，包括子宫和左附件。通过发现影响子宫，卵巢和膀胱壁的子宫外腺肉瘤来进行手术。结论这是一种罕见的病例，但应考虑到具有非典型临床特征或术前病理的患者，因此我们展示了为解决该病例而采取的诊断和治疗策略。