Cases reported "Peritoneal Neoplasms"

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1/182. Ovarian endometrioid-like yolk sac tumor treated by surgery alone, with recurrence at 12 years.

    We describe the case of a stage Ia endometrioid-like yolk sac tumor (YST) of the ovary, which was originally misdiagnosed as a malignant struma ovarii and not treated with adjuvant chemotherapy. After 12 years, a contralateral dermoid cyst was excised along with a small omental nodule of partially necrotic and calcified endometrioid-like YST. No tumor was detected in several other biopsy specimens, and a peritoneal lavage was negative for tumor cells. Since there was no evidence of remaining tumor and the serum alpha-fetoprotein (AFP) level was normal after the second operation, the patient was followed. Serial serum AFP levels remained normal for 4 months. At a second-look laparotomy after 4 months, a small tumor nodule was removed from the cul-de-sac. Postoperatively, the patient received three cycles of BEP chemotherapy. The long disease-free interval after the first operation in spite of the presence of occult spread to the omentum and to the pouch of Douglas in this case indicates that some endometrioid-like YSTs may have an indolent course. The present case underscores the importance of careful surgical staging and of long-term follow-up in cases of primitive germ cell tumors of the ovary.
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2/182. dermatomyositis and peritoneal papillary serous carcinoma.

    We describe an unusual case of peritoneal papillary serous carcinoma (PPSC) arising in a female patient with dermatomyositis (DM). Despite periodic extensive searches for an underlying malignancy, no malignancy had been detected in this patient during the first 2.5 years after the diagnosis of DM. It was only when the patient presented with pleural effusion and ascites that the underlying intra-abdominal malignancy was detected by laparoscopy. Treatment with four cycles of pre-operative chemotherapy (taxol and cisplatin) resulted in tumor regression with amelioration in the muscular manifestation of the DM, but without parallelic amelioration in the skin manifestations of the DM. Explorative laparotomy confirmed the presence of papillary serous carcinoma in the omentum, surface of the left ovary and the retroperitoneal lymph nodes, and established the diagnosis of PPSC. Following two cycles of postoperative chemotherapy, the patient is alive with no evidence of internal malignancy. However, although muscle strength and enzymes have remained normal, no effect on the skin manifestation of DM has been observed. This case illustrates that, alongside the more frequently occurring ovarian carcinoma, PPSC should also be considered in the differential diagnosis of the underlying malignancy that may occur in the female patient with DM.
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3/182. Urinary undiversion for pelvic actinomycosis: a long-term follow up.

    BACKGROUND: A 43-year-old woman who had been using intrauterine contraceptive devices for the past 10 years underwent an emergency operation for bowel and urinary obstruction. methods/RESULTS: Frozen section analysis showed undifferentiated adenocarcinoma. Incomplete tumorectomy, ileal resection, partial cystectomy, colostomy and bilateral ureterocutaneostomy were palliatively performed. Postoperatively, periodic acid-Schiff and Grocott-Gomori methenamine tests revealed actinomyces and the final diagnosis was pelvic actinomycosis. Treatment with penicillin g administered intravenously relieved her symptoms and the lesion was dramatically improved. The patient underwent colostomy closure and urinary undiversion. CONCLUSIONS: Five years after urinary undiversion, the patient's renal function has been maintained and she can void without incontinence and dysuria.
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4/182. Primary peritoneal psammocarcinoma: A case presenting with an upper abdominal mass and elevated CA-125.

    Primary peritoneal serous adenocarcinoma with predominating psammoma bodies, psammocarcinoma, is a very rare tumor with only seven cases documented in the English literature. Pathological classification of this entity was established in 1990 and clinical behavior of this tumor is uncertain. Based on limited data these tumors appear to behave similarly to low malignant potential tumors of the ovary. This case describes a 59-year-old woman who underwent exploratory laparotomy for a large upper abdominal cystic mass. Findings included a large tumor mass involving the gastrocolic omentum and dense small bowel adhesions. The patient had normal ovaries and was debulked to no macroscopic disease. Final pathologic diagnosis confirmed a stage IIIC primary peritoneal psammocarcinoma. The patient has received no adjunctive therapy and is without evidence of disease 2 years after surgery. Primary peritoneal psammocarcinoma is a neoplasm which can mimic serous adenocarcinoma of the ovary. In contrast, primary peritoneal psammocarcinoma appears to behave in an indolent fashion. Primary surgical debulking should be attempted, while the utility of postoperative chemotherapy remains unknown.
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5/182. Hazards of laparoscopic adrenalectomy for Conn's adenoma. When enthusiasm turns to tragedy.

    A 74-year-old man with primary aldosteronism had a small tumor (27 x 23 mm) of his right adrenal gland successfully removed by a transperitoneal laparoscopy. Despite absence of malignancy in the resected tumor and complete relief of all symptoms in the immediate postoperative period, recurrence occurred 6 months later. The tumor behaved as a carcinoma spread in the peritoneal cavity, and the patient eventually died with peritoneal carcinomatosis. We suggest that the laparoscopic technique coupled with pneumoperitoneum may have favored this recurrence.
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6/182. Cystogastric transmural drainage for the treatment of symptomatic cystic metastases from ovarian carcinoma.

    Approximately 80% of ovarian cancers are discovered when they have already progressed to stage III or IV lesions. The prognosis is, therefore, poor despite intensive treatment. Intraperitoneal dissemination is one of the most frequent pathways of distant spread ovarian cancer and pseudocystic metastases usually occur. When such cystic metastases remain symptomatic despite antitumor treatment, viable options are limited because palliative surgery generates high operative morbidity and mortality. For many years, in patients in whom the risks associated with surgery are high, percutaneous drainage and sclerosis under radiologic guidance has been performed as an effective alternative option for various forms of abdominal fluid collection. Such a collection in pancreatic pseudocyst benefits from cystogastric transmural drainage to avoid external drainage and achieves the same results as surgical cystogastrostomy. We report this transmural drainage technique under image guidance used to drain a symptomatic cystic metastasis, which was compressing the stomach.
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7/182. Solitary fibrous benign mesothelioma of the peritoneum: report of a case.

    A 66-year-old Japanese man who had undergone a subtotal gastrectomy for gastric cancer 1 year earlier, and was asymptomatic, underwent a computed tomography scan during a detailed follow-up examination, which revealed a pancreatic mass. Abdominal ultrasonography showed a solid tumor containing a cystic lesion, and abdominal magnetic resonance demonstrated a tumor with low intensity on T1-weighted images and high intensity on T2-weighted images. Although an abdominal angiography added no new information to help in establishing a preoperative diagnosis, it showed an avascular mass. An endoscopic retrograde pancreatograhy showed compression and deviation of the body part of the pancreatic duct, and dilatation of its caudal part. At laparotomy, an elastic soft tumor was found to originate from the peritoneum of the omental bursa in front of the pancreas. The tumor was encapsulated and solid. The solid lesion consisted of spindle-shaped cells, but no atypical cells were observed. The histological findings were diagnostic of a benign solitary fibrous mesothelioma, which is extremely rare. The patient is currently well and disease-free more than 5 years after this operation.
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8/182. Epithelioid hemangioendothelioma of the greater omentum: report of a case.

    We report herein the case of an 11-year-old girl found to have an epithelioid hemangioendothelioma of the greater omentum. The child presented with a 4-month history of vague lower abdominal pain and gradually increasing generalized distension. Her symptoms and signs could not be ascribed to any specific organ system. ultrasonography and computerized axial tomography revealed a mass lesion anterior to the bowel loops and a laparotomy revealed a huge lobulated mass, arising from the greater omentum, which was completely excised. She has remained well postoperatively without any adjunctive chemotherapy or radiotherapy.
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9/182. Generalized intraperitoneal seeding of hepatocellular carcinoma after microwave coagulation therapy: a case report.

    We first describe a case of generalized intraperitoneal seeding of hepatocellular carcinoma (HCC) after microwave coagulation therapy (MCT). A 61 year-old man underwent operative MCT for an exophytic HCC, 60 mm in diameter, in segment IV of his cirrhotic liver. Despite successful tumor ablation, the serum alpha-fetoprotein levels continuously rose after MCT. Five months later, radiographic examinations delineated several perihepatic masses with hypervascularity, and the patient presented with constipation. At the second laparotomy, there were numerous small peritoneal metastases involving the entire peritoneal cavity and slightly bloody ascites. An omental mass, 50 mm in diameter, involved the transverse colon. Most of these intraabdominal masses were removed together with the involved colon. Histologically, the initial tumor was a moderately differentiated HCC, and the peritoneal masses were poorly differentiated HCCs. The patient died of rapid tumor progression and bleeding 2 months later. In conclusion, we should be aware of the possible occurrence of peritoneal seeding after MCT for HCC. Every effort should be made to prevent this serious complication, particularly in cases of superficial, large, and less differentiated HCCs.
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10/182. Ruptured retroperitoneal mucinous cystadenocarcinoma with synchronous gastric carcinoma and a long postoperative survival: case report.

    We describe an 86-year-old woman with a long survival following surgey for a massive retroperitoneal mucinous cystadenocarcinoma and a synchronous gastric carcinoma. Computed tomography showed a huge tumor with septation and calcification. Upper gastrointestinal radiography showed the additional gastric lesion. At operation, the 23 x 20 x 12-cm retroperitoneal tumor had ruptured. Tumor resection and distal gastrectomy including regional lymph nodes were performed. Mucinous peritoneal implants were removed as completely as possible. Histologically, the mucinous tumor showed limited invasion, whereas the poorly differentiated gastric adenocarcinoma showed no serosal invasion. Among 18 retroperitoneal mucinous cystadenocarcinomas reported in the English literature since 1965, only ours was associated with gastric carcinoma. Despite peritoneal implants, our patient has survived for 6 years without clinical recurrence. As at other sites, retroperitoneal mucinous cystadenocarcinoma often grows slowly. Total removal, even after peritoneal dissemination, can result in long survival.
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