The patient is a 55-year-old female with known stage III b serous ovarian cancer. She had undergone an abdominal hysterectomy and bilateral salpingo-oophorectomy with omentectomy, followed by 6 cycles of carbo/taxol chemotherapy with complete clinical response. She was free of disease for 2 years until her disease recurred and was treated with Carboplatin and Taxol. The carboplatin was eventually switched to Doxil. However, the repeat positron emission tomography (PET) scan at that time showed progression of her disease. Thus she underwent exploratory laparotomy with removal of a splenic mass. She was noted to have peritoneal carcinomatosis at that time and was then treated with Gemzar. The patient had stable disease after this treatment. Five years after the initial diagnosis, the patient was admitted to the hospital with anemia, hemoglobin of 7.0 gm/dl, fatigue, and melena. Computerized Tomography (CT) of the abdomen without IV contrast was obtained on admission, which revealed calcified, heterogeneous, mixed intermediate and high-density deposits worrisome for peritoneal carcinomatosis (, arrows). No IV contrast was administered due to her poor kidney function. She was referred for an EGD, which showed a 7 mm erythematous lesion at the gastroesophageal junction and a 1.5 to 2 cm subepithelial mass () with a superficial overlying erosion in the antrum, but no obvious source for any active bleeding. Initial endoscopic biopsies of the gastroesophageal junction lesion showed granulation tissue polyp with foveolar hyperplasia, and the antral biopsies were normal. Due to the presence of a subepithelial lesion in the antrum, the patient was referred for EUS. Two subepithelial lesions were discovered by EUS, one in the antrum measuring 3.4 × 3.7 cm () and one in the body of the stomach 1.2 × 0.8 cm (). The lesion in the body of the stomach was not appreciated during the EGD. The lesions were hypoechoic masses emanating from the muscularis propria and had the typical appearance of gastrointestinal stromal tumors. FNA was performed of both masses. Both sites revealed papillary adenocarcinoma from an ovarian papillary serous adenocarcinoma primary (). Immunostains for progesterone receptor, estrogen receptor and p 53 were focally positive and confirmatory. The patient was treated with Taxol and is undergoing surveillance imaging.
The patient was a 61-year-old woman diagnosed in November 2013 with stage IV high-grade serous carcinoma of the ovary treated with cycles of carboplatin and taxol chemotherapy with partial clinical response. After 1-year of therapy, due to the persistence of abdominal and pelvic disease, cytoreductive surgery had been performed. In June 2015, her CA125 levels had increased to 138 U/mL (normal value < 35 U/mL) and a computed tomography (CT) of the abdomen showed progression of the disease.\nShe was referred at that time to our endoscopic center for evaluation of dyspepsia. Upper GI endoscopy revealed an SET covered by normal mucosa on the posterior wall of the gastric antrum (Figure ). Biopsies of the overlying mucosa proved inconclusive. EUS showed a 23-mm mass within the muscularis propria, hypoechoic but more hyperechoic than the muscular tissue (Figure ). EUS-guided fine needle biopsy (FNB) was performed for tissue diagnosis. Histology showed adenocarcinoma with immunohistochemistry positive for WT1 and CK7, and negative for CK20 and CDX2 (Figure ). These findings supported the final diagnosis of a metastatic adenocarcinoma of ovarian origin. The patient started paclitaxel chemotherapy and was alive at the 18-mo follow-up visit.