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1.
Acta cir. bras ; 27(12): 912-916, dez. 2012. tab
Article in English | LILACS | ID: lil-657977

ABSTRACT

PURPOSE: To check the rate of sentinel lymph node (SLN) identification in patients with locally advanced breast cancer who underwent neoadjuvant chemotherapy comparing intraoperative contact cytology (imprint) and embedded in paraffin and validation of methods. METHODS: A cross-sectional validation of diagnostic test involving 34 patients from the outpatient clinic of the Maternity School Assis Chateaubriand. The patients had locally advanced breast cancer and were treated with neoadjuvant chemotherapy. Those with clinically negative axilla underwent SLN biopsy, studied by imprint and histopathology in paraffin. All patients underwent axillary dissection and its histopathological study. RESULTS: The SLN identification rate was 85.3% (29/34). The sensitivity of imprint associated with paraffin on detection of metastasis compared to histopathology of the axillary content was 84.62% and specificity of 100% with false-negative rate of 12.01% and an accuracy of 92.77%. CONCLUSION: The search for metastases in the SLN by imprint and histopathological analysis in paraffin compared to the gold standard (axillary dissection) had a low sensitivity with high rate of false negatives in our sample.


OBJETIVO: Verificar a taxa de identificação do linfonodo sentinela (LS) em pacientes portadoras de câncer na mama localmente avançado e que foram submetidos à quimioterapia neoadjuvante comparando a citologia de contato intraoperatória (imprint) e a inclusão em parafina e validação dos procedimentos. MÉTODOS: Estudo transversal de validação de teste diagnóstico envolvendo 34 pacientes oriundas do Ambulatório da Maternidade-Escola Assis Chateaubriand. As pacientes eram portadoras de câncer na mama localmente avançado e foram tratadas com quimioterapia neoadjuvante. Àquelas com axila clinicamente negativa foram submetidas à biopsia do LS, esse estudado por impint e histopatologia em parafina. Todas as pacientes foram submetidas a esvaziamento axilar e seu estudo histopatológico. RESULTADOS: A taxa de identificação do LS foi de 85,3% (29/34). A sensibilidade do imprint associada à parafina quanto à detecção de metástase comparado a análise histopatológica do conteúdo axilar foi de 84,62% e a especificidade de 100% com taxa de falso-negativo de 12,01% e acurácia de 92,77%. CONCLUSÃO: A pesquisa de metástases no linfonodo sentinela por imprint e análise histopatológica em parafina quando comparado ao padrão ouro (esvaziamento axilar) apresentou baixa sensibilidade com taxa elevada de falsos negativos em nossa amostra.


Subject(s)
Adult , Aged , Female , Humans , Middle Aged , Breast Neoplasms/pathology , Lymph Nodes/pathology , Neoadjuvant Therapy , Sentinel Lymph Node Biopsy/methods , Axilla , Breast Neoplasms/drug therapy , Breast Neoplasms/surgery , Cross-Sectional Studies , Chemotherapy, Adjuvant/methods , False Negative Reactions , Lymphatic Metastasis , Lymph Nodes/surgery
2.
Acta cir. bras ; 27(2): 102-108, Feb. 2012. ilus, tab
Article in English | LILACS | ID: lil-614527

ABSTRACT

PURPOSE: This paper aims to study and define the experimental model of sentinel lymph node biopsy of the vulva in bitches. METHODS: 0.2 ml of 99mTc phytate was injected intradermally, using a fine gauge insulin needle in the anterior commissure of the vulva. Thirty minutes after 99mTc injection, the inguinal mapping was performed using a gamma probe. After this, 0.5 ml of blue dye (bleu patenté V Guerbet 2.5 percent) was injected in the same place. After 15 minutes, a 3 cm long inguinal incision was made at point maximum uptake followed by careful dissection, guided by visualization of a bluish afferent lymphatic system that points to the sentinel lymph node (SLN). RESULTS: It was observed that 88 percent of SLN were identified. It wasn´t found a significant difference among the presence or not of sentinel lymph node in the sides, which is an indication of a good consistency. It was observed a high (88 percent) and significant (χ2=12.89 and p=0.0003) intercession between both methods (blue dye and radiation). CONCLUSION: The experimental model adopted is feasible, becoming advantageous in applying the association of Patent blue and 99mTc.


OBJETIVO: Definir um modelo experimental para a pesquisa do linfonodo sentinela na vulva de cadelas. MÉTODOS: 0,2 ml de tecnécio diluído em fitato (99mTc) foi injetado por via intradérmica na comissura anterior da vulva. Trinta minutos após a injeção de 99mTc, o mapeamento inguinal foi realizada utilizando uma sonda gama. Após isto, 0,5 ml de corante azul (bleu Patente Guerbet V 2,5 por cento) foram injetados no mesmo lugar. Após 15 minutos, uma incisão inguinal de três centímetros foi feita no ponto de captação máxima seguido de dissecção cuidadosa, guiada através da visualização de um sistema linfático aferente corado em azul que apontava para o linfonodo sentinela (LS). RESULTADOS: Foi observado que em 88 por cento das vezes o LS foi identificado. Não foi encontrada diferença significativa entre a presença ou não de linfonodo sentinela nos lados direito e esquerdo, o que é uma indicação de uma boa consistência do método. Foi observada uma alta (88 por cento) e significativa (χ2 = 12,89 e p = 0,0003) intercessão entre os dois métodos (corante azul e radiação). CONCLUSÃO: O modelo experimental adotado é viável, tornando-se vantajoso na aplicação da associação de Azul Patente e 99mTc.


Subject(s)
Animals , Dogs , Female , Disease Models, Animal , Sentinel Lymph Node Biopsy/methods , Vulvar Neoplasms/pathology , Vulvar Neoplasms/surgery , Coloring Agents , Gamma Rays , Inguinal Canal/surgery , Lymph Nodes/pathology , Lymph Nodes/surgery , Reproducibility of Results , Radiopharmaceuticals , Rosaniline Dyes , Time Factors , Technetium
3.
Rev. bras. cir. plást ; 26(4): 649-654, out.-dez. 2011. ilus, tab
Article in Portuguese | LILACS | ID: lil-618246

ABSTRACT

INTRODUÇÃO: Cada vez mais são realizadas reconstruções imediatas da mama pós-tratamento do câncer. Para as mastectomias radicais, há várias técnicas consagradas. Na quadrantectomia, as opções de reparação do defeito vão do fechamento primário à utilização de técnicas de cirurgia oncoplástica. Para os tumores dos quadrantes externos, a opção de rotação de todo o músculo latíssimo do dorso é desnecessária, uma vez que usualmente excede ao necessário à reparação do volume perdido. Neste trabalho é proposta uma nova opção para a reconstrução pós-quadrantectomia em quadrantes externos. MÉTODO: A técnica cirúrgica consiste na dissecção do segmento lateral do músculo latíssimo do dorso pelo prolongamento da incisão para a retirada da lesão, no mesmo decúbito dorsal, seguida de sua rotação e modelagem para reparar o defeito decorrente da extirpação do câncer. No total, 21 mulheres com idade entre 33 anos e 69 anos foram submetidas a quadrantectomias de quadrantes externos, seguidas da reconstrução com a técnica descrita neste trabalho. Para a avaliação do método, cada resultado teve atribuído um escore a volume, forma, simetria e alterações do complexo areolopapilar, da cicatriz e da superfície do quadrante operado. RESULTADOS: Os resultados obtidos na avaliação do volume e da forma foram superiores em relação aos da simetria. A nota média foi 7,048, equivalente ao conceito B. CONCLUSÕES: A nova técnica propiciou diminuição do tempo cirúrgico. A aquisição do conceito B demonstra a viabilidade do método.


BACKGROUND: Nowadays, more and more immediate breast reconstructions are carried out after cancer treatment. For performing radical mastectomy, there are several recognized techniques. In quadrantectomy, the options for defect repair range from primary closure to the use of oncoplastic surgery techniques. In the case of external quadrant tumors, there is no option of rotation of the entire latissimus dorsi muscle, which usually exceeds the actions necessary for repairing lost volume. A new option for post-quadrantectomy reconstruction in external quadrants is proposed in this study. METHODS: The surgical technique consists of dissection of the lateral segment of the latissimus dorsi muscle by an extension of the incision for lesion removal in the same supine position, followed by rotation and modeling of this segment to repair the defect caused by cancer removal. Twenty-one women aged 33 to 69 years underwent quadrantectomies of external quadrants followed by reconstruction with the technique described in this paper. To evaluate the method, each result had a score attributed to volume, shape, symmetry, and changes in the nipple areolar complex, as well as scar and operated quadrant surface. RESULTS: The obtained results of volume and shape were superior in relation to those of symmetry. The average grade was 7.048, equivalent to B concept. CONCLUSIONS: The new technique decreased surgical time. The acquisition of the B concept demonstrates the method's feasibility.


Subject(s)
Humans , Female , Adult , Mammaplasty , Breast/surgery , Breast Neoplasms/surgery , Diagnostic Techniques and Procedures , Surgery, Plastic/methods , Dissection , Methods
4.
Clinics ; 66(8): 1413-1418, 2011. ilus, tab
Article in English | LILACS | ID: lil-598397

ABSTRACT

OBJECTIVES: This paper discusses the influence of a para-areolar incision in the upper outer quadrant of the breast on the location of the sentinel lymph node in a canine model. METHODS: The sentinel lymph node was marked with technetium-99, which was injected into the subareolar skin of the cranial breast. After the marker had migrated to the axilla, an arcuate para-areolar incision was performed 2 cm from the nipple in the upper outer quadrant. Patent blue dye was then injected above the upper border of the incision. At the marked site, an axillary incision was made, and the sentinel lymph node was identified by gamma probe and/or by direct visualization of the dye. The agreement between the two injection sites and the two sentinel lymph node identification methods was determined. Our sample group consisted of 40 cranial breasts of 23 adult females of the species Canis familiaris. The data were analyzed by using the McNemar test and by determining the kappa agreement coefficient. RESULT: Our findings showed that in 95 percent of the breasts, the sentinel lymph node was identified by the injection of technetium-99 m into the subareolar region, and in 82 percent of the cases, the sentinel lymph node was identified by the injection of patent blue dye above the upper border of the incision. The methods agreed 82 percent of the time. CONCLUSIONS: Previous para-areolar incisions in the upper outer quadrant did not interfere significantly with the biopsy when the dye was injected above the upper border of the incision.


Subject(s)
Animals , Dogs , Female , Mammary Neoplasms, Animal/pathology , Mammary Neoplasms, Animal , Radiopharmaceuticals , Sentinel Lymph Node Biopsy/methods , Disease Models, Animal , Nipples/surgery
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