11/135. Retroperitoneal mucinous cystadenoma.Primary retroperitoneal mucinous cystadenoma is an uncommon tumor found exclusively in women. Herein, we describe a patient who had resection of a large retroperitoneal cystic mass. Histologic, immunohistochemical, and electron microscopic examination of the lining epithelial cells showed features of mesothelial cells in addition to ovarian mucinous cystadenoma. These findings suggest that these tumors arise from inclusions of mesothelial cells and subsequent mucinous metaplasia of the lining cells to form a cystadenoma. Estrogen receptors may be implicated in tumor promotion, explaining the occurrence exclusively in women.- - - - - - - - - - ranking = 1keywords = cystadenoma (Clic here for more details about this article) |
12/135. choriocarcinoma of the ovary associated with mucinous cystadenoma.We report choriocarcinoma of the ovary associated with mucinous cystadenoma in a 54-year-old postmenopausal woman, the first reported case of this condition. Doppler ultrasonography, computed tomography, and magnetic resonance imaging showed hypervascularity of the tumor that corresponded to the area of choriocarcinoma within the multilocular cyst. The patient exhibited multiple pulmonary metastases and died of intracerebral hemorrhage.- - - - - - - - - - ranking = 0.71428571428571keywords = cystadenoma (Clic here for more details about this article) |
13/135. Mucinous cystadenoma coexisting with stromal tumor with minor sex-cord elements of the ovary: a case report.Mucinous neoplasms occur rarely in association with cystic teratoma, sertoli-leydig cell tumor, granulosa cell tumor or carcinoid tumor. Several cases of an ovarian stromal tumor with minor sex-cord elements have been reported in the literatures. However, there has been no report about an ovarian mucinous neoplasm coexisting with a stromal tumor with sex-cord elements yet. We report a case of an ovarian neoplasm composed of both mucinous cystadenoma and stromal tumor with minor sex-cord elements in a 58-yr-old female. The ovary including the mass measured 5 cm in size. On section, it revealed an unilocular cyst (4.5 cm in diameter) filled with mucinous fluid. There was a round, yellow, solid nodule, 1.5 cm in diameter within the wall. Microscopically, the cyst was lined by a single layer of endocervical mucinous epithelium and the nodule was composed of spindle cells showing an intersecting and whorled arrangement. There were cell nests showing polygonal shape with abundant cytoplasm among the spindle cells. They showed immunoreactivity for inhibin and did not have any connection with the adjacent mucinous epithelium. Therefore, we interpret the mucinous cystadenoma as having arisen de novo.- - - - - - - - - - ranking = 0.85714285714286keywords = cystadenoma (Clic here for more details about this article) |
14/135. Mucinous cystadenoma of the appendix--an unusual cause of intestinal obstruction.INTRODUCTION: Report of a rare presentation of mucinous cystadenoma of the vermiform appendix. CLINICAL PICTURE: A lady who presented with intestinal obstruction and peritonitis was found to have gangrenous small bowel caused by strangulation by a tumour of the appendix. TREATMENT: Right hemicolectomy. OUTCOME: The histology of the appendicular tumour was mucinous cystadenoma. The patient recovered well. CONCLUSION: Mucinous cystadenoma of the appendix can present in many ways and it is important to recognise the pathology at operation.- - - - - - - - - - ranking = 1keywords = cystadenoma (Clic here for more details about this article) |
15/135. Mucinous cystadenoma of the ovary in a 15-year-old girl.Benign neoplasms of the ovary originating from epithelial tissue are common tumors in adult women. They are, however, rarely seen in children or adolescent girls. Here the authors present a case of an ovarian mucinous cystadenoma in a premenarchal girl. To our knowledge, there are only 5 other cases reported in the literature.- - - - - - - - - - ranking = 0.71428571428571keywords = cystadenoma (Clic here for more details about this article) |
16/135. Giant biliary cystadenoma: case report and literature review.Biliary cystadenoma is a very rare cystic neoplasm of the liver. This tumor is insidiously progressive and usually presents in white females in their fifth decade. It has a characteristic appearance on ultrasound, computed tomography, and angiography. The exact etiology of these tumors is unknown, but several theories have been proposed. Historically these cystic tumors have been treated by a variety of techniques including aspiration, fenestration, internal drainage, and resection. Previously reported series have confirmed a >90 percent recurrence rate with anything less than complete excision. In addition biliary cystadenoma is a premalignant lesion and only surgical excision can differentiate it from its malignant counterpart, biliary cystadenocarcinoma.- - - - - - - - - - ranking = 0.85714285714286keywords = cystadenoma (Clic here for more details about this article) |
17/135. Heterotopic bone in the ovary associated with a mucinous cystadenoma.Bone formation in the ovary, with the exception of developing in the setting of a mature cystic teratoma, is exceedingly uncommon. We report a case of bone formation within a mucinous cystadenoma of the ovary. A 19-year-old active duty female presented with an asymptomatic pelvic mass; sonographic imaging revealed a 5.7-cm complex right adnexal mass. A laparoscopic cystectomy was performed. Pathologic evaluation of the cyst revealed a mucinous cystadenoma. Contained within several of the thick fibrous septae were areas of well-formed bone. Although a benign finding, bone formation and associated fibrosis may lead to sonographic findings of concern during the evaluation of patients with a pelvic mass.- - - - - - - - - - ranking = 0.85714285714286keywords = cystadenoma (Clic here for more details about this article) |
18/135. Post-pubertal mucinous cystadenoma of the pancreas.A 14-year-old patient with a mucinous cystadenoma of the pancreas (MCAP) is presented. She presented with a palpable left-sided abdominal mass and underwent a left hemipancreatectomy. MCAP occurs mostly in middle-aged women, and no post-pubertal cases have been reported to date in the English literature.- - - - - - - - - - ranking = 0.71428571428571keywords = cystadenoma (Clic here for more details about this article) |
19/135. intussusception of the appendix secondary to mucinous cystadenoma.intussusception of the appendix vermiformis in adults is an unusual entity. We present a 52-year-old male patient with intussusception of the appendix due to a mucinous cystadenoma, and discuss the clinical features, preoperative diagnosis, classification and therapy of this condition together with a review of the literature.- - - - - - - - - - ranking = 0.71428571428571keywords = cystadenoma (Clic here for more details about this article) |
20/135. Heterogeneous genetic alterations in ovarian mucinous tumors: application and usefulness of laser capture microdissection.Histologic observation of ovarian mucinous tumors suggests that there is a multistep transition through the accumulation of genetic alterations. We analyzed loss of heterozygosity (LOH) and replication error (RER) on TP53 and D17S855 as well as K-ras point mutations of the heterogeneous histologic areas of the same tumor in 26 cases of ovarian mucinous tumor. The laser capture microdissection (LCM) technique has been applied to the study of K-ras point mutation in 10 cases. As for genetic alterations for LOH or RER on TP53 and D17S855, 2 (1 borderline tumor and 1 carcinoma) of 14 cases and 4 (1 borderline tumor and 3 carcinomas) of 12 cases, respectively, showed genetic heterogeneities in different histologic areas. Six (2 borderline tumors and 4 carcinomas) of 18 cases showed heterogeneity of K-ras point mutation in the different histologic areas of the same tumor, and 5 (1 cystadenoma with brenner tumor component, 2 borderline tumors, and 2 carcinomas) of 10 cases showed heterogeneous K-ras mutation pattern in the same tumor when the LCM technique was used. Atypical areas tended to show K-ras point mutations frequently. Out of 3 cases of mixed mucinous cystadenoma and brenner tumor, 1 case showed K-ras point mutation in the brenner tumor area but not in the area of mucinous cystadenoma. These preliminary results suggest that a subset of ovarian mucinous tumors occur through multistep carcinogenesis and show that LCM is useful for molecular pathologic studies.- - - - - - - - - - ranking = 0.42857142857143keywords = cystadenoma (Clic here for more details about this article) |
| <- Previous || Next -> |