Abstract
Retroperitoneal extraskeletal osteosarcoma (ESOS) is a rare and highly invasive tumor that is usually diagnosed at an advanced stage due to the insidious onset. The present study analyses a case of retroperitoneal ESOS and its clinical, radiological and therapeutic conditions, and also provides a review of the literature. A 52-year-old male was diagnosed with retroperitoneal ESOS. The patient succumbed to the condition one year after the initial surgery. During treatment, the patient underwent two additional surgeries and two courses of chemotherapy. In the present case, a peritoneal metastatic lesion of ESOS was shed from the peritoneum and implanted into the outer membrane of the stomach and metastasis was identified, this has rarely been reported in the literature. Retroperitoneal ESOS should be considered in the differential diagnosis of a retroperitoneal mass in order to facilitate the management of surgery and help determine the appropriate treatment of the disease.
Highlights
Extraskeletal osteosarcoma (ESOS) is a rare and highly invasive tumor [1,2,3,5,6,7,8]
The surgery demonstrated that the retroperitoneal mass of ~10x10 cm in size was closely adhered to the right kidney, ileocecum and LIU et al: GASTRIC WALL METASTASIS OF RETROPERITONEAL ESOS: A CASE REPORT
There is a male bias for osteosarcoma, and the gender ratio is 1.9:1.0 [2]
Summary
Extraskeletal osteosarcoma (ESOS) is a rare and highly invasive tumor [1,2,3,5,6,7,8]. The tumor cells exhibited varying degrees of atypia and visible mitotic figures (Fig. 2) From these results, a diagnosis of extraskeletal osteosarcoma was formed. Two months after the surgery, CT imaging (Fig. 1B) revealed a retroperitoneal ESOS near the right upper ureter, with a large amount of calcification. The surgery demonstrated that the retroperitoneal mass of ~10x10 cm in size was closely adhered to the right kidney, ileocecum and LIU et al: GASTRIC WALL METASTASIS OF RETROPERITONEAL ESOS: A CASE REPORT. The surgery revealed a 25x30‐cm right retroperitoneal mass oppressing the descending section of the duodenum and surrounded the descending colon, and a 1.1x1.2‐cm implantation metastasis nodule in the outer membrane of the gastric body anterior wall (Fig. 1C). The patient eventually succumbed to retroperitoneal ESOS one year after the first surgery
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
