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1.
Arch. méd. Camaguey ; 19(2): 119-128, mar.-abr. 2015. graf, tab
Article in Spanish | LILACS, CUMED | ID: lil-745696

ABSTRACT

FUNDAMENTO: el cáncer de mama es la segunda causa de muerte por cáncer y su diagnóstico se basa en la obtención de los factores de riesgo, los hallazgos al examen físico, las pruebas de imágenes y el examen microscópico. OBJETIVO: establecer la correlación ecográfica, citológica y mamográfica en el diagnóstico del cáncer de mama. Métodos: se realizó un estudio de serie de casos, descriptivo, correlacional y prospectivo en un universo de 94 pacientes con diagnóstico de algún tipo de cáncer de mamas atendidas en el Hospital Provincial Universitario Celia Sánchez Manduley, Manzanillo, Granma, desde enero de 2013 a junio de 2014. Los datos fueron obtenidos de las historias clínicas determinándose los hallazgos ecográficos, citológicos, mamográficos y la correlación entre ellos con la biopsia posoperatoria por inclusión en parafina en el establecimiento del diagnóstico definitivo. RESULTADOS: Predominaron los hallazgos ecográficos de una masa sólida hipoecoica de contornos mal definidos e irregulares y mamográficos de una imagen radiopaca de contornos mal definidos, irregulares o espiculados. La correlación entre las pruebas diagnósticas fue de 0,83. CONCLUSIONES: los resultados del diagnóstico ecográfico, citológico y mamográfico en el cáncer de mama eleva la posibilidad de detección de esta enfermedad a valores casi absolutos al tener un coeficiente de correlación elevado.


BACKGROUND: breast cancer is the second cause of death due to this condition and its diagnosis is based on the obtaining of risks factors, finds in the physical examination, imaging tests, and the microscopic test. OBJECTIVE: to establish the mammographic, cytological, and ecographic correlation in the diagnosis of breast cancer. Methods: a prospective, correlation, descriptive, case series study was conducted in a universe of 94 patients with the diagnosis of any type of breast cancer treated in the Celia Sánchez Manduley Provincial Teaching Hospital, Manzanillo, Granma, from January, 2013 to June, 2014. The data were obtained from medical histories. Ecographic, cytological, mammographic finds and their correlation with the postoperative biopsy by paraffin inclusion were determined, establishing the definite diagnosis. RESULTS: ecographic finds of a hypoechoic solid mass of irregular and non-defined margins predominated, as well as mammographic finds of a radiopaque image of spicular, irregular, non-defined margins. The correlation among the diagnostic tests was of 0, 83. CONCLUSIONS: the results of the ecographic, cytological and mammographic diagnosis in breast cancer increases the possibility of detecting the disease to almost-absolute values since there is a high correlation coefficient.


Subject(s)
Humans , Female , Breast/cytology , Breast Neoplasms/diagnosis , Breast Neoplasms/ultrastructure , Mammography/statistics & numerical data , Ultrasonography, Mammary , Epidemiology, Descriptive , Prospective Studies
2.
Int. j. morphol ; 29(3): 825-829, Sept. 2011. ilus
Article in Spanish | LILACS | ID: lil-608665

ABSTRACT

El carcinoma epidermoide (CE) puro primario de la mama es una rara entidad clínico-patológica, que representa menos del 0,1 por ciento de todos los carcinomas de mama, conformada en su totalidad por células escamosas malignas que no presentan relación anatómica con la piel adyacente de la mama. Su etiopatogenia, pronóstico y tratamiento son motivo de controversias. Presentamos 1 caso de CE puros primario de la mama diagnosticado en la Unidad de Anatomía Patológica del Hospital Hernán Henríquez Aravena de la ciudad de Temuco, Chile.


Pure primary squamous cell carcinoma (SCC) of the breast is a rare clinicopathological entity, representing less than 0.1 percent of all breast carcinomas, composed entirely of malignant squamous cells do not exhibit anatomical relationship with the skin overlying to the breast. Its etiopathogenesis, prognosis and treatment is controversial. We present a case of pure primary SCC of the breast diagnosed at the Unit of Pathology, Hospital Hernán Henríquez Aravena.


Subject(s)
Aged , Carcinoma, Squamous Cell/diagnosis , Carcinoma, Squamous Cell/pathology , Carcinoma, Squamous Cell/ultrastructure , Breast Neoplasms/diagnosis , Breast Neoplasms/pathology , Breast Neoplasms/ultrastructure
3.
Int. j. morphol ; 29(3): 891-894, Sept. 2011. ilus
Article in Spanish | LILACS | ID: lil-608676

ABSTRACT

El adenomioepitelioma es un infrecuente tumor de la mama, conformado por una proliferación bifásica de células epiteliales y mioepiteliales. Presentamos las características clínicas y morfológicas de un caso de adenomioepitelioma benigno diagnosticado en una paciente de 34 años en la Unidad de Anatomía Patológica del Hospital Hernán Henríquez Aravena de Temuco.


Breast adenomyoepithelioma is a rare tumor, characterized bythe biphasic proliferation of epithelial and myoepithelial cells. We present clinical and morphological features of a case of benign adenomyoepithelioma diagnosed in a 34 year old patient in the Hernán Henríquez Aravena Hospital in Temuco.


Subject(s)
Female , Adenomyoepithelioma/surgery , Adenomyoepithelioma/diagnosis , Adenomyoepithelioma/pathology , Adenomyoepithelioma/ultrastructure , Breast Neoplasms/surgery , Breast Neoplasms/diagnosis , Breast Neoplasms/pathology , Breast Neoplasms/ultrastructure , Diagnosis, Differential , Myoepithelioma/classification , Myoepithelioma/diagnosis , Myoepithelioma/pathology , Myoepithelioma/ultrastructure
4.
Int. j. morphol ; 27(3): 873-878, sept. 2009. ilus
Article in English | LILACS | ID: lil-598951

ABSTRACT

Until recently, complete removal of axillary lymph nodes was performed as part of the treatment of breast cancer. Sentinel lymph node biopsy (SLNB) in selected cases has reduced the number of cases of wide axillary dissection and the related morbidity. Knowledge of breast lymphatic drainage is essential for understanding the principles behind SLNB and also for performing safe and correct axillary lymphonodectomy. This paper describes in detail the anatomical issues relating to breast lymphatic drainage and the correlated axillary and extra-axillary lymph nodes. In addition, it shows the application of this theoretical knowledge to surgical practice, especially with regard to SLNB and lymphonodectomy. The surgical nomenclature is compared with the current International Anatomical Terminology.


Hasta hace poco, la eliminación completa de los linfondos axilares se realizaba como parte del tratamiento del cáncer de mama. En casos seleccionados la biopsia del linfonofo centinela ha reducido el número de casos de disección axilar y la morbilidad. El conocimiento del drenaje linfático de la mama es esencial para comprender los principios detrás del SNLB y también para la realización segura y correcta de la linfonodectomía axilar. Este trabajo describe en detalles los aspectos anatómicos en relación a la lactancia y correlaciona el drenaje linfático axilar y linfonofos extra-axilares. Además, se muestra la aplicación de estos conocimientos teóricos en la práctica quirúrgica, sobre todo con respecto al linfonofo centinela y la linfonodectomía. La nomenclatura quirúrgica es comparada con la actual Terminología Anatómica Internacional.


Subject(s)
Humans , Female , Breast Neoplasms/surgery , Breast Neoplasms/pathology , Breast Neoplasms/ultrastructure , Sentinel Lymph Node Biopsy/methods , Drainage/methods , Lymph Node Excision
5.
New Egyptian Journal of Medicine [The]. 2009; 40 (1 Supp.): 71-79
in English | IMEMR | ID: emr-113153

ABSTRACT

Breast cancer is the second most common cancer in the women. Fifty patients with suspected breast mass lesion [40 palpable and 10 nonpalpable] were included in this study. Both mammography and MRI [Plain and Contrast enhanced] were performed in every patient. Ultrasonography and galactorgraphy were performed in few patients whenever required. Following this, fine needle aspiration of the breast mass was done and the materials were studied cytopathologically. For nonpalpable lesions sensitivity of mammography and MRI was 65% and 90%, while the specificity was 25% and 50% respectively. For palpable lesions both methods showed high sensitivity [Mammography 90% and MRI 95%] and MRI demonstrated comparatively higher specificity [Mammography 30% and MRI 50%]. In two mammographically negative patients MRI showed positive result. With the complementary use of MRI, it is possible to increase the sensitivity for detection of breast cancer and multicentric disease. In patients in whom the status of a palpable breast mass remains unclear but where strong clinical suspicion exists, MRI may help to reduce the amount of unnecessary biopsies. This study aimed to assess the value of B-mode, nonenhanced and enhanced power Doppler ultrasonography [US], fine-needle aspiration biopsy [FNAB] and magnetic resonance [MR] imaging as adjunctive tools in breast diagnostics


Subject(s)
Humans , Female , Breast Neoplasms/ultrastructure , Mammography/methods , Magnetic Resonance Imaging/methods , Biopsy, Fine-Needle/methods
6.
Rev. chil. obstet. ginecol ; 73(6): 370-373, 2008. ilus
Article in Spanish | LILACS | ID: lil-550003

ABSTRACT

Antecedentes: La adquisición del fenotipo metastático es el resultado de la potente acción generada por oncogenes transformantes sobre una célula normal los cuales con la consiguiente expresión de oncoproteínas determinan drásticos cambios tanto en la morfología como en los volúmenes de los componentes celulares, generando una célula con diferente funcionalidad. Este mecanismo corresponde a la transformación celular. Objetivo: Precisar las modificaciones que caracterizan al mecanismo transformante en células de epitelio mamario transfectado con el oncogén ras (HC11 ras) en comparación con su tipo celular normal (HC11GM). Método: Se estudió con microscopia electrónica de transmisión aplicando técnicas morfométricas a estos tipos celulares con énfasis en las mitocondrias, cuantificando variaciones del organelo generador de energía. Resultados: Todos los parámetros mitocondriales evaluados en el tipo celular transformado presentan diferencias significativas con respecto a la célula normal. Conclusión: Las drásticas modificaciones experimentadas por las mitocondrias se reflejan en la adquisición de nuevos requerimientos energéticos y metabólicos en la célula transformada.


Background: The acquisition of the metastatic phenotype is the result of the transforming oncogene powerful action over a normal cell which with the subsequent oncoprotein expression leads to drastic changes in morphology as well as in cell components volumes, generating a cell with a different function. This mechanism relates to the cell transformation. Objective: To specify the modifications that characterize the transforming mechanism in mammary epithelial cells transfected with the ras oncogene comparing them with its normal cell type. Method: Transmission electronic microscopy using morphometric techniques was applied to this cell types, emphasizing mitochondria variations, trying to clarify its role in each cell type metabolism. Results: Everyone mitochondrial parameters examined in transformed cell type present significant differences regarding to the normal cells. Conclusión: The drastic changes in mitochondria are reflected in the acquisition of new energy requirements and metabolism in the transformed cell.


Subject(s)
Humans , Female , Cell Transformation, Neoplastic , Epithelial Cells/ultrastructure , Genes, ras , Mitochondria , Breast Neoplasms/ultrastructure , Epithelium/ultrastructure , Microscopy, Electron, Transmission , Breast/ultrastructure , Transfection
8.
São Paulo med. j ; 118(2): 46-48, Mar. 2000. ilus
Article in English | LILACS | ID: lil-289849

ABSTRACT

CONTEXT: The malignant variety of the phyllodes tumor is rare. The occurrence of invasive lobular carcinoma within fibroadenoma is rare as well. DESIGN: Case report. CASE REPORT: A 58-year-old black female patient was referred to the Mastology unit of the Department of Gynecology, Federal University of Sao Paulo / Escola Paulista de Medicina, in February 1990, presenting an ulcerated tumor in the right breast with fast growth over the preceding six months. She was a virgin, with meno-pause at the age of 45 years and had not undergone hormone replacement treatment. The physical examination showed, in her right breast, an ulcerated tumor of 20 x 30 cm which was not adher-ent to the muscle level, multilobular and with fibroelastic consistency. The axillary lymph nodes were not palpable. The left breast showed a 2 x 3 cm painless, movable nodule, with well-defined edges, and fibroelastic consistency. We performed left-breast mammography, which showed several nodules with well-defined edges, the largest being 2 x 3 cm and exhibiting rough calcification and grouped microcalcifications within it. The patient underwent a frozen biopsy that showed a malignant variant of the phyllodes tumor in the right breast and fibroadenoma in the left one. After that, we performed a total mastectomy in the right breast and an excision biopsy in the left one. Paraffin study confirmed the frozen biopsy result from the right breast, yet we observed that in the interior of the fibroadenoma that was removed on the left, there was a focal area of invasive lobular carcinoma measuring 0.4 cm. The patient then underwent a modi-fied radical mastectomy with total axillary lymphadenectomy. None of the 21 dissected lymph nodes showed evidence of metastasis. In the follow-up, the patient evolved asymptomatically and with normal physical and laboratory examination results up to July 1997


Subject(s)
Humans , Female , Middle Aged , Breast Neoplasms/pathology , Fibroadenoma/pathology , Carcinoma, Lobular/pathology , Phyllodes Tumor/pathology , Breast Neoplasms/ultrastructure , Mammography , Fibroadenoma/ultrastructure , Carcinoma, Lobular/ultrastructure
10.
Cir. gen ; 19(3): 192-7, jul.-sept. 1997. ilus
Article in Spanish | LILACS | ID: lil-226865

ABSTRACT

Objetivo. Describir y precisar el valor e indicaciones de cada uno de los métodos actuales de imagen en el diagnóstico del cáncer de mama. Sede. Hospital de tercer nivel de atención. Metodología. Revisión, análisis y selección (30 referencias) de la bibliografía internacional. Resultados. La mastografía de alta resolución es el método de imagen más útil para el diagnóstico temprano del cáncer de mama. El ultrasonido, con traductores de alta frecuencia, es una valiosa ayuda en la patología mamaria benigna. La tomografía computada y la resonancia magnética son útiles para la estadificación del cáncer de mama, pero para el diagnóstico temprano poco efectivas. Otros métodos de imagen se encuentran en fase experimental. Conclusión. A pesar de los avances tecnológicos actuales, la mastografía es la principal modalidad de imagen para la detección temprana del cáncer de mama


Subject(s)
Humans , Female , Breast , Breast Neoplasms , Breast Neoplasms/diagnosis , Breast Neoplasms/ultrastructure , Diagnostic Imaging/history , Tomography, X-Ray Computed/history , Ultrasonography/history
11.
São Paulo med. j ; 115(2): 1390-4, Mar.-Apr. 1997. ilus, tab
Article in English | LILACS | ID: lil-199907

ABSTRACT

Tamoxifen is an antiestrogen drug widely utilized for the adjuvant hormonal treatment of breast carcinoma. Its use in the primary prophylaxis of this disease is currently being proposed. Although the drug has few side effects, its precise action on breast tissue that has not undergone neoplastic transformation has not been fully elucidated. This prospective, randomized study assessed the estrogen activity of tamoxifen on the mammary gland epithelium of premenopausal patients using a quantitative analysis of mammary epithelium lysosomes identified by the cytochemical technique of GOMORI for acid phosphatase and by light microscopy. Tamoxifen significantly increased the number of lysosomes only during the secretory phase of the menstrual cycle. We concluded that the early effect of the drug on normal mammary tissue is synergistic with the effect of estrogen during the premenopausal period.


Subject(s)
Adult , Female , Humans , Adolescent , Tamoxifen/pharmacology , Breast/drug effects , Premenopause/drug effects , Estrogen Antagonists/pharmacology , Lysosomes/chemistry , Breast/ultrastructure , Breast Neoplasms/ultrastructure , Fibroadenoma/ultrastructure , Epithelial Cells , Menstrual Cycle/drug effects
12.
Rev. cuba. oncol ; 13(1): 12-6, ene.-mar. 1997. tab, graf
Article in Spanish | LILACS | ID: lil-195667

ABSTRACT

Se estudio la expresion de la molecula CD6 en celulas mononucleares perifericas y en ganglios linfaticos axilares de 30 pacientes con cancer de mama, sin tratamiento oncoespecifico previo, mediante las tecnicas de inmunofluorescencia indirecta e inmunohistoquimica respectivamente. Se utilizo el anticuerpo monoclonal (AcM) IOR-TI (anti-CD6). Los resultados obtenidos en celulas mononucleares mostraron una disminucion de la significacion estadistica (p < 0,01) de las celulas CD6+ de pacientes con relacion a los controles, estas variaciones fueron mas evidentes en estadios avanzados. En el estudio de ganglios el resultado mas relevante fue el aumento del por ciento de casos con baja expresion de celulas CD6+ y la correlacion (p < 0,01) entre los niveles de celulas CD6+ en sangre periferica y ganglios


Subject(s)
Breast Neoplasms/ultrastructure , Ganglia/pathology , Glycoproteins/isolation & purification , Glycoproteins/deficiency , Lymphocytes/pathology
13.
Rev. chil. cir ; 48(3): 240-5, jun. 1996. ilus, tab
Article in Spanish | LILACS | ID: lil-175035

ABSTRACT

Existen evidencias previas que demuestran un aumento de la actividad global de proteín-quinasa en tejido mamario canceroso, lo que se traduce en patrones de fosforilación proteica alterados, tanto para proteínas de membrana (plasmática y nuclear) como citoplásmicas. La fosforilación proteica es un importante mecanismo de regulación de ciclo celular, de modo que el hallazgo de fosforilaciónes anormales dentro de las células patológicas puede constituir un indicio de la alteración que induce la neoplasia, y en la práctica podría relacionarse con la evolución del tumor. Con el objeto de cuantificar los niveles de fosforilación endógena de proteínas y de demostrar que los patrones de fosforilación en las células neoplásicas son diferentes de los de la células no neoplásicoas, se realizó un estudio en homegenizado de tejido mamario obtenido de 18 pacientes, en cada una de las cuales se extrajó una muestra de tejido canceroso y otra de parénquima mamario normal. En ellas se determinó la actividad PK endógena con técnica de Roskoski modificada y se determinó los patrones de fosforilación mediante análisis electroforético y posterior exposición en placas de autorradiografía.En 17 de los 18 casos, se detectó una diferencia entre los tejidos normales y los neoplásicos reflejado en los patrones de fosforilación respectivos. Las diferencias más notables se encontraron en la fosforilación endógena de la proteína de 59,5 kd que se fosforila en el 88,9 por ciento de los cánceres y en el 16,7 por ciento de los tejidos normales; la proteína de 13 kd que se fosforila en el 72,2 por ciento de los cánceres y en el 22,2 por ciento de los tejidos normales y en la proteína de 150 kd que se fosforila en el 94,4 por ciento de los cánceres y en el 16,7 por ciento de los tejidos normales. Las diferencias observadas demuestran que existe una notable alteración en los mecanismos de regularización de la fosforilación proteíca dentro de la célula de cáncer de mama


Subject(s)
Humans , Female , Breast Neoplasms/enzymology , Intracellular Membranes/enzymology , Phosphorylation , Protein Kinases/metabolism , Autoradiography , Breast Neoplasms/ultrastructure , Breast/ultrastructure , Culture Techniques , Electrophoresis , Neoplasm Staging , Prognosis , Disease Progression , Cell Cycle Proteins/metabolism
14.
Indian J Cancer ; 1996 Jun; 33(2): 76-85
Article in English | IMSEAR | ID: sea-50593

ABSTRACT

A total of 200 breast tissues which included 5 normals, 55 benign and 140 malignant lesions were stained for Argyrophilic Nucleolar Organiser Regions (AGNORs). A comparison of the AGNOR values with histologic variables, viz., tumor type, size nuclear grade, desmoplasia, elastosis, lymph node metastasis and Oestrogen and Progesterone Receptor (ER/PR) status was carried out in malignant lesions. AGNOR values could sharply distinguish benign from malignant lesions. Among the malignant lesions, an attempt to determine the value of AGNOR count in prognostication was made. AGNOR counts correlated with tumor size, mitoses and desmoplasia. ER/PgR negative tumors showed a tendency for high NOR counts, but lymph node metastasis, which is considered one of the most reliable prognostic indicators, did not concur with AGNOR counts in our study. These results indicate that AGNOR counts can not be used as a sole independent marker in breast cancer prognostication.


Subject(s)
Breast Diseases/pathology , Breast Neoplasms/ultrastructure , Case-Control Studies , Female , Humans , Nucleolus Organizer Region/pathology , Prognosis , Silver Staining
15.
In. Schiabel, Homero; Slaets, Annie France Frère; Costa, Luciano da Fontoura; Baffa Filho, Oswaldo; Marques, Paulo Mazzoncini de Azevedo. Anais do III Fórum Nacional de Ciência e Tecnologia em Saúde. Säo Carlos, s.n, 1996. p.419-420, graf.
Monography in Portuguese | LILACS | ID: lil-236423

ABSTRACT

Mamografia é o mais eficiente método de se detectar alguns casos de câncer de mama antes que sejam clinicamente palpáveis. Esta detecção, muitas vezes, é prejudicada pelo espalhamento porque este influi de maneira deletérica sobre o contraste. O propósito deste trabalho é quantificar este efeito e a dose média glandular, para uma composição mamária 50/50 por cento, diferente kVp e espessuras de mamas. Os resultados obtidos apresentam uma diminuição do contraste com o aumento da kVp e da espessura; um aumento da dose média glandular com o aumento da espessura e uma diminuição com o aumento da kVp.


Mammography has the potential to detect breast cancer before they become clinically palpable. Under some conditions the images are affected by scattered radiation reducing the contras!. The objective of this study is to quantify this effect and the average glandular dose as a function of kVp and breast thickness for breast composition 50/50%. The results show that the contrast decreases with increasing kVp and breast thickness, and the average glandular dose increases with increasing breast thickness and decreases with increasing kVp.


Subject(s)
Humans , Breast Neoplasms/ultrastructure , Mammography , Contrast Media/therapeutic use , Phantoms, Imaging , Radiation Dosage
16.
Journal of the Egyptian National Cancer Institute. 1994; 6 (3): 505-515
in English | IMEMR | ID: emr-106301

ABSTRACT

This study aims at reviewing 26 cases of medullary carcinoma by routine morphologic analysis according to the criteria described for each subtype. An electron-microscopic study is carried out on selected cases to clarify ultrastructural differences between the 3 subtypes. Among the 26 cases studied 12 were TMC. Ultrastructural analysis has shown many points of similarity between TMC and AMC and revealed signs of their ultrastructural differentiation in spite of their light microscopic undifferentiation. On the other hand, NMIDC is undifferentiated on ultrastructural level. These findings explain reports of a significantly better prognosis of TMC and AMC over NMIDC grade III. The previous proposal of a simplification to this subtying can be approved, putting into consideration that NMIDC should be defined separately as an infiltrating duct carcinoma with dense lymphocytic infiltrate E/M should be performed to cases in the borderline between AMC and NMIDC


Subject(s)
Humans , Female , Breast/pathology , Microscopy, Electron , Evaluation Study , Breast Neoplasms/ultrastructure
17.
Indian J Pathol Microbiol ; 1992 Jul; 35(3): 219-28
Article in English | IMSEAR | ID: sea-73244

ABSTRACT

Paraffin sections of formalin fixed tissues, obtained from patients with smooth muscle and breast tumours, were studied by the silver staining technique to quantitate the Nucleolar Organizer Regions (AgNORs) per nucleus and to assess its significance as an independent variable in predicting the behaviour of these neoplasms. Five benign and five malignant tumours of smooth muscle along with ten benign and ten malignant epithelial tumours of breast were studied. Normal myometrium and breast tissue served as controls. Control, benign and malignant tumours of smooth muscle showed mean AgNOR scores of 2.68, 3.89 and 12.50 per nucleus respectively. Control, benign and malignant tumours of breast showed mean AgNOR scores of 1.75, 7.45 and 12.72 per nucleus respectively. These results suggest that quantitative analysis of AgNORs per nucleus is capable of differentiating benign from malignant lesions of smooth muscle and breast.


Subject(s)
Breast Neoplasms/ultrastructure , Female , Histocytochemistry/methods , Humans , Muscle, Smooth/pathology , Neoplasms, Muscle Tissue/ultrastructure , Nucleolus Organizer Region/ultrastructure
18.
Rev. cuba. cir ; 29(1): 128-34, ene.-feb. 1990. ilus
Article in Spanish | LILACS | ID: lil-85575

ABSTRACT

Se estudiaron 3 casos de carcinoma medular de la mama desde el punto de vista anatomopatológico, se incluyeron los aspectos ultraestructurales de 2 de ellos. Se describieron los principales aspectos histopatológicos así como los principales hallazgos de la microscopia electrónica; se comparan con los reportados en la literatura


Subject(s)
Adult , Middle Aged , Humans , Female , Breast Neoplasms/ultrastructure , Carcinoma/ultrastructure
19.
Rev. Inst. Nac. Cancerol. (Méx.) ; 35(4): 913-20, oct.-dic. 1989. ilus
Article in Spanish | LILACS | ID: lil-88563

ABSTRACT

Hemos estudiado la organozación genómica del proto-oncogen myc celular (c-myc) en 48 tumores de mama primarios de humano. Dos tipos de alteraciones (amplificación y rearreglo) se observó en 27 de los tumores estudiados (56%). El proto-oncogen c-myc, apareció amplificado de 2 a 15 veces en el DNA de 20 tumores (41%). Fragmentos relacionados a c-myc no germinal (rearreglos) de tamaño variable fueron detectados en 7 tumores de mama primarios (6 malignos, 1 benigno); 4 de estos tumores presentaron tanto arreglo como amplificación y los otros 3 presentaron únicamente rearreglo. La mayoría de los tumores analizados fueron adenocarcinomas ductal invasivo; 58% de éstos mostraron alteraciones genéticas en el locus c-myc. Aunque las alteraciones de c-myc descritas aquí no aparecen correlacionarse con el comportamiento agresivo de los tumores de mama primarios, parecen estar asociados con el desarrollo de carcinoma mamario


Subject(s)
Humans , Female , Breast Neoplasms/ultrastructure , Carcinoma, Ductal, Breast/ultrastructure , Gene Amplification , Gene Rearrangement , Oncogenes
20.
Rev. cuba. cir ; 28(3): 153-7, mayo-jun. 1989. ilus
Article in Spanish | LILACS | ID: lil-80924

ABSTRACT

Se estudiaron 2 casos de carcinoma intraductal de la mama y 2 casos de carcinoma microinfiltrante, se destacaron el valor de la unión epitelioestromal y la presencia o no de los miofibroblastos en el estroma. En el carcinoma intraductal la lámina basal puede estar intacta, con brechas o haber desaparecido, pero el criterio más seguro es que esté intacta; en el estroma hay fibroblastos con el retículo endoplasmático dilatado, pero no hay miofibroblastos. En el carcinoma microinfiltrante, además de la brechas o desaparición de la lámina, hay salida o protusión de las células carcinomatosas hacia el estroma y presencia de miofibroblastos


Subject(s)
Humans , Breast Neoplasms/ultrastructure , Carcinoma, Ductal, Breast/ultrastructure
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