641 research outputs found
Head And Heck Mucoepidermoid Carcinoma: Clinicopathologic Study Of 173 Cases
Introduction: Mucoepidermoid carcinoma (MEC) is the most common malignant salivary gland tumor, however few studies have been reported in Brazilian populations. Aim: To report clinical and pathologic data from 173 head and neck MEC treated in the Treatment and Research Center at Hospital do Câncer A. C. Camargo in São Paulo. Study design: Clinical randomized. Material and Method: From 1953 to 1997, 173 cases of MEC were found in the medical files of the center. Data were obtained from the patients' records and histological review of all cases. Results: The mean age of the patients was 44 years and 93 (53.8%) were men; parotid glands were affected in 61 cases (35.2%) and intraoral minor salivary glands in 75 (43.4%). TNM revealed 50.3% of the cases in stages I and II, and histological grading revealed 45.2%, 18.5% and 36.3% low-grade, intermediate-grade and high-grade tumors, respectively. Surgical treatment was employed in 80.3% of the cases, with neck dissection in 52 cases (30.1%), and radiotherapy in 73 (42.2%). Local recurrence, regional and distant metastases were found in 12.7%, 9.8% and 9.2% of the patients, respectively; 5-year and 10-year overall survival rates were 70% and 60%, respectively. Conclusions: MEC affected mainly the parotid gland and the palate of adults, without gender preference. Half of the cases were diagnosed at initial clinical stages and 64% of the tumors were low or intermediate-grade lesions. Surgery was the treatment of choice and prognosis was good.685679684Ellis, G.L., Auclair, P.L., Gnepp, D.R., Surgical Pathology of the salivary glands (1991) Major Problems in Pathology Series, 25. , Philadelphia: WB Saunders CompanyEllis, G.L., Auclair, P.L., Tumors of the Salivary Glands (1996) Armed Forces Institute of Pathology. Atlas of Tumor Pathology. 3 rd Series, , Fascicle 17. WashingtonAuclair, P.L., Goode, R.K., Ellis, G.L., Mucoepidermoid carcinoma of intraoral salivary glands (1992) Cancer, 69, pp. 2021-2030Cardoso, W.P., Denardin, O.V., Rapoport, A., Araujo, V.C., Carvalho, M.B., Proliferating cell nuclear antigen expression in mucoepidermoid carcinoma of salivary glands (2000) São Paulo Med J, 118, pp. 69-74Goode, R.K., Auclair, P.L., Ellis, G.L., Mucoepidermoid carcinoma of the major salivary glands: Clinical and histopathologic analysis of 234 cases with evaluation of grading criteria (1998) Cancer, 82, pp. 1217-1224Brandwein, M.S., Ivanov, K., Wallace, D.I., Hille, J.J., Wang, B., Fahmy, A., Bodian, C., Mills, S.E., Mucoepidermoid carcinoma: A clinicopathologic study of 80 patients with special reference to histological grading (2001) Am J Surg Pathol, 25, pp. 835-845Evans, H.L., Mucoepidermoid carcinoma of salivary glands: A study of 69 cases with special attention to histologic grading (1984) Am J Clin Pathol, 81, pp. 696-701Nascimento, A.G., Amaral, A.L.P., Prado, L.A.F., Kligerman, J., Silveira, T.R.P., Mucoepidermoid carcinoma of salivary glands: A clinicopathologic study of 46 cases (1986) Head Neck Surg, 8, pp. 409-417Plambeck, K., Friedrich, R.E., Bahlo, M., Bartel-Friedrich, S., Klapdor, R., TNM staging, histopathological grading, and tumor-associated antigens in patients with a history of mucoepidermoid carcinoma of the salivary glands (1999) Anticancer Res, 19, pp. 2397-2404Spiro, R.H., Huvos, A.G., Berk, R., Strong, E.W., Mucoepidermoid carcinoma of salivary gland origin: A clinicopathologic study of 367 cases (1978) Am J Surg, 136, pp. 461-468Chinellato, L.E.M., Marquez, I.M., Fleury, R.N., Quevedo, F.C., Estudos da prevalência dos tumores de origem epitelial de glândulas salivares em Serviços de Anatomia Patológica das cidades de Bauru e Jaú (Estado de São Paulo, Brasil) (1994) Rev Fac Odontol Bauru, 2, pp. 45-51Franzi, A.S., Carvalho, M.B., Carcinoma mucoepidermóide avançado das glândulas salivares (1997) Rev Bras Cancerol, 43, pp. 273-280Kusama, K., Iwanari, S., Aisaki, K., Wada, M., Ohtani, J., Itoi, K., Hanai, K., Moro, I., Intraoral minor salivary gland tumors: A retrospective study of 129 cases (1997) J Nihon Univ Sch Dent, 39, pp. 128-132Lopes, M.A., Kowalski, L.P., Santos, G.C., Almeida, O.P., A clinicopathologic study of 196 intraoral minor salivary gland tumors (1999) J Oral Pathol Med, 28, pp. 264-267Loyola, A.M., De Araujo, V.C., De Sousa, S.O.M., De Araujo, N.S., Minor salivary gland tumours: A retrospective study of 164 cases in a Brazilian population (1995) Oral Oncol Eur J Cancer, 31 B, pp. 197-201Rapoport, A., De Andrade Sobrinho, J., Brasilino De Carvalho, M., Magrin, J., Fava, A.S., Cancer of the parotid gland (1981) Int Surg, 66, pp. 243-246Rapoport, A., Carvalho, M.B., Fava, A.S., Góis Filho, J.F., Chagas, J.F.S., Kowalski, L.P., Kanda, J.L., Cheuhen, J.A., Diagnóstico e tratamento das neoplasias das glândulas salivares menores: Estudo de 55 casos (1988) Rev Col Bras Cirur, 15, pp. 289-293Regis De Brito Santos, I., Kowalski, L.P., Cavalcante De Araujo, V., Flavia Logullo, A., Magrin, J., Multivariate analysis of risk factors for neck metastasis in surgically treated parotid carcinomas (2001) Arch Otolaryngol Head Neck Surg, 127, pp. 56-60Spiro, R.H., Thaler, H.T., Hicks, W.F., Kher, U.A., Huvos, A.H., Strong, E.W., The importance of clinical staging of minor salivary gland carcinoma (1991) Am J Surg, 162, pp. 330-336Hicks, M.J., El-Naggar, A.K., Flaitz, C.M., Luna, M.A., Batsakis, J.G., Histocytologic grading of mucoepidermoid carcinoma of major salivary glands in prognosis and survival: A clinicopathologic and flow cytometric investigation (1995) Head Neck, 17, pp. 89-95Hicks, J., Flaitz, C., Mucoepidermoid carcinoma of salivary glands in children and adolescents: Assessment of proliferation markers (2000) Oral Oncol, 36, pp. 454-460Ma'aita, J.K., Al-Kalsi, N., Al-Tamimi, S., Wraikat, A., Salivary gland tumors in Jordan: A retrospective study of 221 patients (1999) Croat Med J, 40, pp. 539-54
The distance to the Sgr dwarf spheroidal galaxy from the Red Giant Branch Tip
We derived the distance to the central region of the Sagittarius dwarf
spheroidal galaxy from the Red Giant Branch Tip. The obtained distance modulus
is , corresponding to a heliocentric distance
Kpc. This estimate is in good agreement with the distance
obtained from RR Lyrae stars of the globular cluster M~54, located in the core
of the Sgr galaxy, once the most accurate estimate of the cluster metallicity
and the most recent calibration of the relation are
adopted.Comment: 6 pages, 5 figure, Accepted for publication in MNRA
ANATOMIA DO FÍGADO E VIAS BILÍFERAS DO MUÇUÃ (Kinosternon scorpioides)
Twenty livers of adult muçua were analyzed. The samples were obtained through an
authorization of IBAMA (license nº 006/02, process nº 0220120011113/2002/81). The animals
were anesthetized with xilazine (1mg/Kg/IM) and ketamine (20mg/Kg/IM). After muscular relaxation,
they were sacrificed by means of an injection of sodium thiopental at 2.5% in the lethal doses of
60mg/Kg/IV). The coelomatic cavity was opened and the liver dissected with the aid of a magnifying
glass. In all the animals the liver was quite voluminous, brown, rectangular in shape, extending
through the whole medium portion of the coelomatic cavity, covering the pancreas, duodenum and
stomach. External fissures divided the liver in 5 lobes: right lateral and median; square; left lateral
and caudate with a papillae process. The liver is maintained in its anatomical position by the pressing
of the coelomatic viscera as well as by the following ligaments: hepatogastric (connecting to the
stomach); hepatoduodenopancreatic (connecting to the duodenum and pancreas); hepatopulmonar
(connecting to the lung); hepatocoelomatic (connecting to the ventral portion of the coelomatic cavity)
and hepatopericardic (connecting to the pericardial bursa). In regard to the bile ducts, it is observed
that branches originated from the hepatic lobes pull together forming the main right and left
ducts, which, together with the cystic duct derived from the gall bladder vesicle, originate the bile
duct. According to these observations we concluded that the liver of the muçua is similar to the
domestic mammals regarding the shape, number, characterization and bile draining of the hepatic
lobe and differs from the ones of the related species such as salamander, snakes and other reptiles.Foram pesquisados 20 fígados de muçuãs (Kinosternon scorpiodes) adultos obtidos
mediante autorização do IBAMA (licença nº006/02 e processo nº 022012001113/2002-81). Os animais
foram anestesiados com cloridrato de xilazina (1 mg/Kg/IM) e cloridrato de quetamina (20 mg/Kg/IM) e
após relaxamento muscular, foram sacrificados através da aplicação de tiopental sódico a 2,5%, na
dose letal de 60 mg/Kg/EV. Em seguida prosseguiu-se com a abertura da cavidade pleuroperitoneal e
a dissecação do órgão, auxiliada por lupa. Em 100% dos animais estudados aquele órgão apresentase
como um fígado bastante volumoso, de formato retangular, coloração marrom, se estendendo por
toda a porção média da cavidade pleuroperitoneal, envolvendo o pâncreas, duodeno e o estômago.
Apresenta-se dividido, por fissuras externas, em cinco lobos: lateral e medial direitos, quadrado, lateral
esquerdo, e caudato, este com o processo papilar. O fígado encontra-se mantido na posição anatômica
pela pressão das vísceras pleuroperitoneais e pelos ligamentos, quais sejam, hepatogástrico (ligandoo
ao estômago), hepatoduodenopancreático (ligando-o ao duodeno e pâncreas), hepatopulmonar
(ligando-o ao pulmão), hepatopleuroperitoneal (ligando-o à porção ventral da cavidade pleuroperitoneal)
e hepatopericárdico (ligando-o ao saco pericárdico). Quanto às vias bilíferas, observa-se que são
formadas por ramos oriundos dos lobos hepáticos, que se juntam formando os ductos principais direito
e esquerdo, os quais, juntamente com o ducto cístico, oriundo da vesícula biliar, formam o ducto colédoco.
De acordo com as observações realizadas sobre a morfologia externa, conclui-se que o fígado do
muçuã assemelha-se ao dos principais mamíferos domésticos, no que se refere à forma, número,
caracterização e drenagem biliar dos lobos hepáticos, diferindo, entretanto, do das espécies mais
próximas, como as salamandras, cobras e outros répteis
Horizontal Branch Stars: The Interplay between Observations and Theory, and Insights into the Formation of the Galaxy
We review HB stars in a broad astrophysical context, including both variable
and non-variable stars. A reassessment of the Oosterhoff dichotomy is
presented, which provides unprecedented detail regarding its origin and
systematics. We show that the Oosterhoff dichotomy and the distribution of
globular clusters (GCs) in the HB morphology-metallicity plane both exclude,
with high statistical significance, the possibility that the Galactic halo may
have formed from the accretion of dwarf galaxies resembling present-day Milky
Way satellites such as Fornax, Sagittarius, and the LMC. A rediscussion of the
second-parameter problem is presented. A technique is proposed to estimate the
HB types of extragalactic GCs on the basis of integrated far-UV photometry. The
relationship between the absolute V magnitude of the HB at the RR Lyrae level
and metallicity, as obtained on the basis of trigonometric parallax
measurements for the star RR Lyrae, is also revisited, giving a distance
modulus to the LMC of (m-M)_0 = 18.44+/-0.11. RR Lyrae period change rates are
studied. Finally, the conductive opacities used in evolutionary calculations of
low-mass stars are investigated. [ABRIDGED]Comment: 56 pages, 22 figures. Invited review, to appear in Astrophysics and
Space Scienc
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