Detecção do lindonodo sentinela com 99m Tc-Fitato em pacientes com carcinoma invasor do colo uterino
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Data
2004
Autores
Silva, Lucas Barbosa da [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Investigar a viabilidade da detecção do linfonodo sentinela (LNS) utilizando o mapeamento linfático radioisotópico com 99m-Técnécio–fitato em pacientes submetidas a histerectomia radical e linfadenectomia pélvica para tratamento de câncer de colo uterino. Entre julho de 2001 e fevereiro de 2003, 56 pacientes com câncer de colo uterino estádios (FIGO) I (n=52) e II (n=4) foram submetidas à detecção do linfonodo sentinela por meio da linfocintilografia pré-operatória (99mTc-fitato injetado no colo uterino às 3, 6, 9 e 12h , na dose de 55-74MBq e volume de 0,8ml) e do mapeamento linfático intra-operatório com gamma probe. A histerectomia radical foi abortada em três casos devido à infiltração parametrial constatada durante a cirurgia, sendo realizada somente a ressecção dos linfonodos sentinelas. As demais 53 pacientes foram submetidas à histerectomia radical com linfadenectomia pélvica. Os linfonodos sentinelas foram identificados utilizando-se o gamma probe e foram enviados para avaliação histopatológica durante o procedimento cirúrgico. Das 56 pacientes selecionadas, o linfonodo sentinela foi detectado em 52 (92,8%), num total de 120 detectados pela linfocintilografia (média de 2,2 por paciente) e no per-operatório pelo gamma probe. Na cadeia ilíaca externa foram identificados 44% deles, 39% na fossa obturatória, 8,3% na bifurcação das ilíacas e 6,7% na cadeia ilíaca comum. Em 31 pacientes (59%), ele foi identificado unilateralmente e em 21 (41%) bilateralmente. Metástase linfonodal foi confirmada em 17 (32%) casos. Em 10 (59%), somente o linfonodo sentinela apresentava metástase. Os 98 que se apresentaram negativos à hematoxilina-eosina foram encaminhados para avaliação imunohistoquímica para citoqueratina. Cinco (5,1%) micrometástases foram identificadas por essa técnica. A sensibilidade do linfonodo sentinela foi de 82,3%...
Investigate the feasibility of sentinel lymph node identification using radioisotopic lymphatic mapping with technetium-99m-labeled phytate in patients undergoing radical hysterectomy with pelvic lymphadenectomy for treatment of cervical cancer. Between July 2001 and February 2003, 56 patients with cervical cancer FIGO stages I (n = 52) and II (n = 4) underwent sentinel lymph node detection with preoperative lymphoscintigraphy (99mTc-labeled phytate injected into the uterine cervix, at 3, 6, 9 and 12 o`clock, at a dose of 55-74 MBq in a volume of 0.8 ml) and intraoperative lymphatic mapping with a handheld gamma probe. Radical hysterectomy was aborted in three cases because parametrial invasion was found intraoperatively, and we performed only sentinel node resection.The remaining 53 patients underwent a radical hysterectomy with complete pelvic lymphadenectomy. Sentinel nodes were detected using a handheld gama-probe and removed for pathological assessment during the abdominal radical hysterectomy and pelvic lymphadenectomy. In 56 eligible patients, the sentinel node was detected in 52 patients (92,8%). A total of 120 sentinel lymph nodes were detected by lymphoscintigraphy (mean 2.27 nodes per patient) and intraoperatively, by gamma probe. Forty-four percent of sentinel nodes were found in the external iliac area, 39% in the obturator region, 8,3% in interiliac region and 6,7% in the common iliac area. In thirty-one patients (59%), unilateral sentinel nodes were found. The remaining 21 patients (41%) had bilateral sentinel nodes. Microscopic nodal metastases were confirmed in 17(32%) of cases. In 10(59%) of these patients, only sentinel nodes had metastases. The 98 sentinel nodes that were negative on hematoxylin and eosin were submitted to cytokeratin immunohistochemical analysis. Five (5,1%) micrometastases... (Complete abstract click electronic access below)
Investigate the feasibility of sentinel lymph node identification using radioisotopic lymphatic mapping with technetium-99m-labeled phytate in patients undergoing radical hysterectomy with pelvic lymphadenectomy for treatment of cervical cancer. Between July 2001 and February 2003, 56 patients with cervical cancer FIGO stages I (n = 52) and II (n = 4) underwent sentinel lymph node detection with preoperative lymphoscintigraphy (99mTc-labeled phytate injected into the uterine cervix, at 3, 6, 9 and 12 o`clock, at a dose of 55-74 MBq in a volume of 0.8 ml) and intraoperative lymphatic mapping with a handheld gamma probe. Radical hysterectomy was aborted in three cases because parametrial invasion was found intraoperatively, and we performed only sentinel node resection.The remaining 53 patients underwent a radical hysterectomy with complete pelvic lymphadenectomy. Sentinel nodes were detected using a handheld gama-probe and removed for pathological assessment during the abdominal radical hysterectomy and pelvic lymphadenectomy. In 56 eligible patients, the sentinel node was detected in 52 patients (92,8%). A total of 120 sentinel lymph nodes were detected by lymphoscintigraphy (mean 2.27 nodes per patient) and intraoperatively, by gamma probe. Forty-four percent of sentinel nodes were found in the external iliac area, 39% in the obturator region, 8,3% in interiliac region and 6,7% in the common iliac area. In thirty-one patients (59%), unilateral sentinel nodes were found. The remaining 21 patients (41%) had bilateral sentinel nodes. Microscopic nodal metastases were confirmed in 17(32%) of cases. In 10(59%) of these patients, only sentinel nodes had metastases. The 98 sentinel nodes that were negative on hematoxylin and eosin were submitted to cytokeratin immunohistochemical analysis. Five (5,1%) micrometastases... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Colo uterino - Câncer - Tratamento, Cervical cancer
Como citar
SILVA, Lucas Barbosa da. Detecção do lindonodo sentinela com 99m Tc-Fitato em pacientes com carcinoma invasor do colo uterino. 2004. 110 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Medicina de Botucatu, 2004.