1/335. craniopharyngioma invading the nasal and paranasal spaces, and presenting as nasal obstruction.A case of craniopharyngioma invading the nasal and paranasal sinuses and presenting as nasal obstruction is reported. Imaging showed a destructive mass of the skull base with involvement of the nose and paranasal sinuses. In the excised mass mitoses were frequent and the proliferation index was high. Invasion of the nasopharynx and presentation as a nasopharyngeal mass is uncommon for a craniopharyngioma.- - - - - - - - - - ranking = 1keywords = obstruction (Clic here for more details about this article) |
2/335. Sialoblastoma: clinicopathological/immunohistochemical study.Sialoblastoma is an extremely rare salivary tumor diagnosed at birth or shortly thereafter with significant variability in histologic range and clinical course, so that for an individual case it may be difficult to predict the most appropriate therapy. We detail the case of a toddler noted to have a firm 1-2-cm mass in the left cheek at 21 months. Parotidectomy was performed at 26 months, revealing a sialoblastoma; the resection margins were positive. During the next 10 months, the mass recurred or persisted, necessitating numerous procedures. The tumor was composed of basaloid cells with fine chromatin and other more mature cuboidal epithelial cells. Ductules and solid organoid nests with some tendency toward peripheral pallisading were also noted. There was no perineural invasion; necrosis initially was sparse but increased over time. The mitotic rate also increased from 6 to 7/10 high-power fields in the first resection to 20/10 high-power fields in the last resection. Nuclear pleomorphism increased with time. The MiB1 proliferative index revealed a dramatic increase in the number of labeled nuclei: from 3 cells/10 high-power fields in the first specimen to 94 cells/10 high-power fields for the last specimen. Cytokeratin accentuated the ductal structures. S-100 showed a diffuse staining pattern, with darker staining of the spindled myoepithelial cells. The Her-2-neu protein showed moderate cytoplasmic staining, whereas the p53 showed only occasional labeling of nuclei. This is the first case of sialoblastoma with evidence of increasing anaplasia based on increasing proliferative capacity. Therefore, the distinction between benign and malignant sialoblastomas may not be as well defined as previously thought. The patient's prognosis is likely to be determined by the tumor grade as well as the stage at presentation and the extent of resection.- - - - - - - - - - ranking = 0.27240802107708keywords = duct (Clic here for more details about this article) |
3/335. Primary endometrioid carcinoma of fallopian tube. Clinicomorphologic study.Twenty cases of primary Fallopian tube endometrioid carcinoma (PFTEC) are presented in the paper. This accounts for 42.5% of all histologic forms of primary Fallopian tube carcinoma (PFTC) found in our Department. The youngest patient was 38, and the oldest 68 years (mean: 56 years). Seven patients were nulliparas. Only two cases were bilateral. According to FIGO staging, 13 cases were evaluated as stage I, 4 as II, and 3 as stage III. Due to the histologic grading, 8 tumors were classified as well, 7 as moderately, and 5 as poorly differentiated. In the time of preparation of the manuscript, 12 women were still alive, 2 of them with recurrent disease. The follow-up of patients without recurrence ranged from 4 to 120 months (median: 63). Eight patients had died (survival time: from 4 to 65 months; median: 26). Metastases were found in 8 patients, especially to ovaries. In 14/20 cases of PFTEC various forms of tubal wall invasion were observed. blood or lymphatic vessels involvement was found in 9 patients. Six of them had died and one is alive with the symptoms of disease. Immunohistochemical detection of the mutant form of p53 protein and oncogene product, c-erbB-2, was studied in 17 cases. Nine patients exhibited simultaneous p53 protein accumulation and c-erbB-2 expression. 2/9 of these patients are alive with recurrent tumors and 4/9 died. Endometrioid carcinoma of the Fallopian tube can be characterized by a tendency to superficial invasion of tubal wall and in a half of the cases by invasion of vessels. The majority of these tumors were diagnosed at an early stage tumors.- - - - - - - - - - ranking = 0.27240802107708keywords = duct (Clic here for more details about this article) |
4/335. Epithelial-myoepithelial carcinoma: An unusual tumor of the paranasal sinus.A 65-year old woman presented with nasal obstruction and on examination was found to have a huge mass in the maxillary sinus. This was removed, and histological examination revealed a mixture of trabecular structures consisting of inner dark cells, outer clear cells and solid structures consisting of only clear cells. Immunohistochemical examination showed the clear cells to be positive for alpha-smooth muscle actin. Ultrastructural examination confirmed the myoepithelial cell origin. The characteristic morphological, immunohistochemical and ultrastructural features aided in the diagnosis of epithelial-myoepithelial carcinoma.- - - - - - - - - - ranking = 0.2keywords = obstruction (Clic here for more details about this article) |
5/335. Diffuse metastatic infiltration of a carcinoma into skeletal muscle.Skeletal muscle is one of the most unusual sites of metastasis from any malignancy. We report a patient with rapidly progressive contractures due to metastatic infiltration of a carcinoma of unknown origin into the skeletal muscle. This 61-year-old man presented with a 1-month history of rapidly evolving, painful restriction of mobility of his right arm and his legs. Computed tomography showed diffuse metastatic nodules in all muscles, particularly in the hip abductors. Muscle biopsy revealed extensive infiltration of the muscle with carcinoma cells.- - - - - - - - - - ranking = 0.27240802107708keywords = duct (Clic here for more details about this article) |
6/335. Primary hepatic carcinoid tumor.A primary hepatic carcinoid tumor arising in a 49-year-old woman is reported. The patient was admitted with multiple hepatic tumors and treated by a left lobectomy and cholecystectomy. Cut sections of the specimen revealed a solid and necrotic mass, measuring 10 x 12 x 13 cm, with multiple small satellite nodules. Histologically, the tumor cells had small oval-shaped nuclei and presented with a trabecular arrangement and rosette-like formation. Both Grimelius and Fontana-Mason stainings were positive. The tumor cells were positive for chromogranin a and negative for other antigens. Ultrastructural studies of the tumor cells revealed duct-like formation with microvilli and a cluster of dense small immature neurosecretory granules in the cytoplasm. These findings were consistent with those of carcinoid tumors. Postoperatively, the patient was treated with repeated transcatheter arterial chemoembolization for any remnant tumors. However, she died of the disease 5 years after the initial surgery. The autopsy findings suggested the primary site to be the liver.- - - - - - - - - - ranking = 0.27240802107708keywords = duct (Clic here for more details about this article) |
7/335. chondrosarcoma in a patient with McCune-Albright syndrome. Report of a case.A case of McCune-Albright syndrome with acromegaly and chrondrosarcoma is reported. The potential role of chronic growth hormone overproduction in the occurrence of malignant transformation and the possible value of bisphosphonates in the treatment of bone fibrous dysplasias are discussed.- - - - - - - - - - ranking = 0.27240802107708keywords = duct (Clic here for more details about this article) |
8/335. Observations on the histopathologic diagnosis of microinvasive carcinoma of the breast.Our histopathologic criteria for diagnosing microinvasive carcinoma of the breast may be enunciated as follows: (1) cytologically malignant cells in the stroma associated with in situ carcinoma, (2) absence of basement membrane and myoepithelial cells around the invasive cells, (3) frequent accompanying stromal alterations in the form of myxomatous change and loosening of connective tissue, and (4) the frequent presence of an inflammatory cell infiltrate composed of lymphocytes and plasma cells. Most or all of these four features are present in cases of ductal microinvasive carcinoma of the breast, but the lobular type is not likely to be accompanied by stromal changes or a lymphoplasmacytic cell infiltrate. The minimum information regarding microinvasive carcinoma of the breast that should be conveyed in the final pathology report includes size as measured by the ocular micrometer or a statement that microinvasion refers to a lesion smaller than 1 mm, the number of foci of invasion, and the spatial distribution of the invasive foci. The nuclear grade of the invasive cells and the size, type, and nuclear grade of the accompanying DCIS should be specified. The status of margins, presence of vascular channel involvement (a rarity in microinvasive carcinoma of the breast), and degree of proliferative changes in adjacent nonneoplastic breast tissue should be reported. Immunostains for basement membrane and myoepithelial cells may be helpful in the diagnosis of microinvasive carcinoma of the breast. Sclerosing lesions such as radial scar and sclerosing adenosis can simulate microinvasive carcinoma of the breast, especially when the latter is associated with in situ carcinoma. Caution should be exercised in cases wherein in situ malignant cells may be dislodged by needling procedures or during dissection of the excised specimen. cautery-induced artifacts also hinder optimal histologic assessment. In some cases, it is virtually impossible to determine if true invasion is present, and the statement "microinvasive carcinoma of the breast cannot be entirely excluded" may be employed as a last resort. We consider the latter diagnosis to be the last refuge of the diligent pathologist and do not recommend it unless all diagnostic measures, including examination of deeper levels and supplemental stains, have been exhausted. It may be necessary to seek an expert opinion in "difficult" cases, particularly in the event that therapeutic decisions are to be based on the determination of invasion. From a clinical perspective, the management of microinvasive carcinoma of the breast ought to be dictated by the individual circumstances in each case. Based on currently available data, which admittedly suffer from lack of diagnostic uniformity, the vast majority of patients with microinvasive carcinoma of the breast will be node-negative and can look forward to an excellent prognosis. It is hoped that since the UICC has adopted a previously recommended definition of microinvasive carcinoma of the breast, prospective or retrospective studies with uniform diagnostic criteria will be conducted that will enable more definitive conclusions regarding the treatment and prognosis of microinvasive carcinoma of the breast.- - - - - - - - - - ranking = 0.54481604215415keywords = duct (Clic here for more details about this article) |
9/335. adenoma arising from the cystic duct and extending to the confluence of the extrahepatic biliary tract.We describe a rare case of adenoma with a few foci of severe atypia arising from the cystic duct in a 68-year-old woman, initially diagnosed by the presence of intracholecystic tumefactive sludge on abdominal ultrasonography. Endoscopic retrograde cholangiography (ERC) disclosed a tuberous filling defect at the orifice of the cystic duct. pathology examination of the biopsied specimen obtained from ERC disclosed not a cancerous but an adenomatous lesion. Macroscopically, the resected specimen showed a superficially spreading and shallowly elevated lesion extending from the cystic duct to the common bile duct. Although a few sporadic foci of severe atypia were observed, microscopy did not reveal any cancer findings, but confirmed the tumorous lesion as benign adenoma, showing mild-to-moderate atypia. Postoperative immunohistochemistry revealed no expression of p53 protein. We briefly refer to the rarity of adenoma in the biliary tract and discuss the difficulty of differential diagnosis of neoplastic lesions in the extrahepatic biliary tract.- - - - - - - - - - ranking = 127.86510161456keywords = extrahepatic, bile duct, duct, bile (Clic here for more details about this article) |
10/335. Descending aorta substitution with expandable ends prosthesis. Case report.A case of esophageal cancer infiltrating the left bronchus pars membranacea and the aneurysmal aortic wall was resected en bloc with the bronchial and aortic wall. Descending aorta was substituted by means of a Dacron prosthesis fitted with expandable devices at both ends, allowing a very significant reduction of the clamping time and simplification of this part of the procedure.- - - - - - - - - - ranking = 0.27240802107708keywords = duct (Clic here for more details about this article) |
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