@entity2970 ( @entity2970 ), also known as an @entity2970 , is a rare @entity2971 . Primary retroperitoneal @entity2970 (PRYST) is extremely rare and, to the best of our knowledge, has only been described in case reports. The histogenesis of PRYST and the appropriate treatment strategy remain unclear due to the rarity of this type of @entity5 . The present study reports a case of @entity2970 in the retroperitoneum. A 19-year-old female presented with abdominal distension and @entity4 of the lower limbs. A computed tomography scan revealed a large, solid mass located in the retroperitoneum. The @entity5 size was 20 25 30 cm and widespread @entity3 was identified during the exploratory laparotomy. The postoperative histopathology report showed a @entity5 (although a @entity2970 was initially considered). The @entity1 underwent three surgical procedures and 17 cycles of five different chemotherapy regimens. The @entity1 succumbed to @entity3085 , which was due to @entity5 recurrence, and liver and spleen metastases 21 months after diagnosis. PRYST may relapse following surgical treatment; however, surgical resection is currently the optimal treatment method. In this case, @entity1732 , @entity2879 and @entity900 ; @entity1732 , @entity1891 and @entity900 ; and @entity1891 and @entity900 chemotherapy regimens were effective for the @entity1 with PRYST, although the @entity5 was not completely resected. a-fetoprotein ( @entity160 ) is an important @entity5 marker for monitoring PRYST recurrence and observation of elevated serum @entity160 levels during chemotherapy indicates a poor prognosis.

Primary yolk sac XXXX of the retroperitoneum: A case report and review of the literature.

@entity1 :: ('9606', 'Species') :: ['patient'] @entity2971 :: ('MESH:D009373', 'Disease') :: ['malignant germ cell tumor'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'malignant retroperitoneal tumor'] @entity4 :: ('MESH:D004487', 'Disease') :: ['edema'] @entity2970 :: ('MESH:D018240', 'Disease') :: ['endodermal sinus tumor', 'YST', 'Yolk sac tumor'] @entity3085 :: ('MESH:D002100', 'Disease') :: ['cachexia'] @entity900 :: ('MESH:D002945', 'Chemical') :: ['cisplatin'] @entity2879 :: ('MESH:D005047', 'Chemical') :: ['etoposide'] @entity160 :: ('174', 'Gene') :: ['AFP'] @entity1891 :: ('MESH:D014750', 'Chemical') :: ['vincristine'] @entity3 :: ('MESH:D009362', 'Disease') :: ['metastasis'] @entity1732 :: ('MESH:D001761', 'Chemical') :: ['bleomycin']
@entity5 :: (MESH:D009369,Disease) :: ['tumor']
