No abstract available.
Sentinel Lymph Node Biopsy*

No abstract available.
Nitriles ; Pyrethrins ; Sentinel Lymph Node Biopsy

Objectives: To determine the accuracy of SLNB using methylene blue dye. Methods: Breast cancer patients consulting at the VSMMC Breast Center with biopsy proven adenocarcinoma of the breast, a Tis, T1, T2 or T3 primary breast tumor and clinically negative ipsilateral axilla by palpation and ultrasound, were included in the study. The subjects underwent either modified radical mastectomy or breast conservation theraphy. Subareolar injection of 5 ml 1% methylene blue dye 5 minutes prior to sentinel lymph node biopsy. Three blue staining axillary lymph nodes were taken and sent to pathology for frozen section evaluation and after surgery, H & E staining. A completion axillary lymph node dissection was done in all patients. Accuracy of SLNB using methylene blue was calculated using final histopathology results as gold standard. Results: Twent patients were included in this study. SLNB in this group had an accuracy, sensitivity, specificity, PPV, and NPV of 95.0% 83.3%, 100%, 100%, and 93.3%, respectively. The false negative rate is 6.7%. On the average, the SLN's were identified in 14 minutes. Conclusion: Sentinel lymph node dissection with methylene blue has an accuracy of 95% in the VSMMC Breast Center. Key words: sentinel lymph node biopsy, methylene blue dye, breast cancer
Human ; Female ; SENTINEL LYMPH NODE BIOPSY

A treatment option for early stage breast cancer is nodal evaluation by axillary lymph node dissection (ALND). An alternative to ALND is sentinel lymph node (SLN) biopsy employing radionuclide SLN mapping. This study was designed to investigate the relationship between malignancy spread to the SLN and primary tumor size by reviewing the clinical profile of 20 female breast cancer patients who underwent radionuclide SLN mapping procedure, sentinel lymph node and primary tumor biopsy, as well as axillary lymph node dissection. The accuracy of radionuclide mapping in the identifying the sentinel node and determining the status of the axillary lymph nodes was reviewed. Among the mapped sentinel nodes, 15% were positive for metastatic lymphadenopathy and 85% without malignant spread. The malignant sentinel nodes had a mean size of 5.5 ± 0.87 cm and the negative sentinel nodes had a mean size of 2.95 ±2.2 cm. The SLN identified by radionuclide mapping truly represented the status of the rest of the axillary nodes for the presence or absence of metastatic lymphadenopathy. Primary tumor size is a prognostic factor for cancer spread to the sentinel node. However, the combination of primary tumor histology and tumor size may prove to be a stronger prognostic indicator malignancy spread to the sentinel lymph node.

Human ; Female ; Axilla ; Breast Neoplasms ; Lymph Node Excision ; Lymph Nodes ; Lymphadenopathy ; Prognosis ; Radioisotopes ; Sentinel Lymph Node ; Sentinel Lymph Node Biopsy

PURPOSE: We investigated the feasibility and clinical applicability of sentinel lymph node biopsy (SLNB) in patients with neoadjuvant chemotherapy, tumor size > 2 cm, and privious excisional biopsy. METHODS: 175 patients with 176 breast cancer underwent aLNB between October 2001 and October 2002. Among them twenty-five patients with locally advanced breast cancer underwent SLNB after neoadjuvant chemotherapy. Eighty-nine (50.6%) had primary tumor > 2 cm. The recent biopsy method used before SLNB was excision in thirty-one (17.6%) procedures. The identification rate, false-negative rate, negative prediction value and accuracy of SLNB were determined. RESULTS: SLNB was successful in 164 of 176 cases (detection rate, 93.2%). The identification rate of patients who had neoadjuvant chemotherapy was 68% and lower than that of who had not (97.3%), significantly (P=0.00). However, mapping success was not influenced by large tumor size (> 2 cm) or previous excisional biopsy. The false-negative rate and accuracy were 16.5% and 91.5, respectively. The false negative rate was 21.3% (3/14) in those patients received neoadjuvant chemotherapy compared with a 15.5% in those patents not received neoadjuvant chemotherapy (P> 0.05). In addition, Tumor size > 2 cm and previous excision did not adversely impact the false negative rate and accuracy. CONCLUSION: Neoadjuvant chemotherapy was associated with a lower identification rate for SLNB. But if detected, SLNB after neoadjuvant chemotherapy might reliably predict axillary status. SLNB is feasible and accurate in patients with large tumor (> 2 cm) and previous excision.
Biopsy ; Breast Neoplasms ; Drug Therapy* ; Humans ; Sentinel Lymph Node Biopsy*

PURPOSE: This study was performed to find the adequate number of removed lymph nodes to achieve an acceptable false-negative rate when performing sentinel lymph node biopsy for breast cancer. METHODS: A total of 179 sentinel node biopsies combined with conventional axillary lymph node dissection for breast cancer were performed between November 2003 and June 2007. RESULTS: The overall identification rate of sentinel lymph node and the false negative rate of the biopsy were 95.0% and 8.1%, respectively. Yet the false negative rate of the biopsy was lowered as the number of the removed nodes was increased. Especially, the false negative rate was 0% when more than 4 lymph nodes were removed. CONCLUSION: We recommend that four lymph nodes should be removed to obtain accurate results in sentinel node biopsy for breast cancer.
Biopsy ; Breast ; Breast Neoplasms ; Lymph Node Excision ; Lymph Nodes ; Nitriles ; Pyrethrins ; Sentinel Lymph Node Biopsy

OBJECTIVEThis study was designed to evaluate whether sentinel node (SN) biopsy can accurately assess the cervical lymph node status of oral tongue carcinoma, as well to research the best method and indications of SN biopsy.

METHODSPreoperative lymphoscintigraphy with (99m)Tc-SC and intraoperative sentinel node mapping with methylene blue dye were administered on 20 cases of oral tongue carcinoma with cN(0) neck and 5 cases with cN(+) neck; routine pathological examination was used to assess the status of SNs. The results of routine pathological examination of cervical specimen were set as golden standard to assess the efficacy of SN biopsy in evaluating the cervical lymph node status.

RESULTS53 SNs were detected in 24 cases out of the total 25 cases (96%), averaging 2.2 SNs per case. SNs were detected in all 20 cases with cN(0) neck, in which 4 cases with occult cervical metastasis were detected by SN diopsy, without false negative case found in the procedure. In 5 cases with cN(+) neck, SNs were detected in 4 cases. In 4 cases whose SNs were detected, there were 5 cN(+) necks, out of which SNs were detected in 4 cN(+) necks but failed to predicted the cervical lymph node status in 2 necks. However, SNs were detected in 2 out of the other 3 cN(0) necks, both of which were diagnosed as SN(+)pN(+).

CONCLUSIONSNuclear lymphoscintigraphy and blue dye mapping can be used to trace the SNs in cases with oral tongue carcinoma, with satisfactory detective rate. SN biopsy can accurately evaluate the cervical lymph node status in cases of oral tongue carcinoma with cN(0) neck. Whether it can be used to evaluate the lymph node status of the cN(0) neck in case with a contralateral cN(+) neck is worthy of further research.

Humans ; Sentinel Lymph Node Biopsy ; Tongue Neoplasms ; pathology

No abstract available.
Endometrial Neoplasms/*pathology ; Female ; Humans ; Lymph Node Excision/*methods ; *Sentinel Lymph Node Biopsy

No abstract available.
Endometrial Neoplasms/*pathology ; Female ; Humans ; Lymph Node Excision/*methods ; *Sentinel Lymph Node Biopsy

Sentinel lymph node biopsy has not gained popularity in the Philippines, perhaps the reason being the unavailability of resources. The use of methylene blue may change this situation.
OBJECTIVE: The authors intend to demonstrate that methylene blue may be used as an alternative dye in sentinel lymph node biopsy for breast cancer with satisfactory results.
METHODS: Twenty patients diagnosed with breast cancer underwent sentinel lymph node biopsy after injection with methylene blue dye, followed by complete axillary dissection. Histologic evaluation of the nodes was done using H&E stain.
RESULTS: The identification rate was 95%, with no false negatives.
CONCLUSION: Sentinel lymph node biopsy using methylene blue can be done with satisfactory results.

Human ; Sentinel Lymph Node Biopsy ; Methylene Blue ; Philippines ; Lymph Node Excision ; Breast Neoplasms ; Coloring Agents