Surgical treatment of breast cancer...

Surgical treatment of breast cancer is rapidly evolving, and advances in surgical technology as well as the evolution of minimally invasive surgical techniques have heralded a just discovered era in surgery. Sentinel lymph node biopsy is single of the new technologies that must suited today's challenges of improving efficiency and reducing patient risk at diminished price and resource utilization.(1)

WHAT IS SENTINEL LYMPH NODE BIOPSY?

The lymphatic combination of parts to form a whole disseminates fluids and proteins everywhere the body to prevent swelling. Acting as a filter, the classification also serves as a conduit for cancer confined apartments to flow from a primary tumor to other sites in a particular material substance region. The sentinel node is the first lymph node in a regional lymphatic basin to receive lymphatic drainage from a primary tumor; therefore, it is the first lymph node assaulted by tumor cells metastasizing between the walls of the lymphatic channels.(2) For the breast, the sentinel lymph node is located in the axillary region of the general intented side.

Sentinel lymph node biopsy is a diagnostic manner of proceeding used to determine the status of regional lymph nodes for staging intentions The sentinel lymph node can be located precisely for surgical excision and pathological examination by way of injecting a blue dye and radioactive isotope around the primary tumor. As the sentinel lymph node is most numerous likely to harbor a concentrated amount of metastases, a more focused histologic analysis is made possible, and the tumor status of this node will cogitate the tumor status of the entire basin.(3)

The technique first was described in 1977 and was popularized in the mid 1980 and early 1990 by dint of physicians studying melanoma.(4) Since the late 1990 sentinel lymph node biopsy for patients with breast carcinoma has been studied to validate cancer stages to predict patients' survival, issues and the necessity for further adjuvant therapy or radiotherapy.(5)

for what purpose USE SENTINEL LYMPH NODE BIOPSY?

The final cause of sentinel lymph node biopsy is to accurately predict metastases or diagnose stages of cancer without having to perform a finished axillary dissection. Lumpectomy for tumor removal remains a necessity and accompanies the sentinel lymph node biopsy; however, axillary dissection may be eliminated for many patients. Determining the carriage of metastatic involvement in the axillary nodes is of paramount importance and remains the greatest in number powerful predictor of survival and return For patients with early stage breast cancer, the nodal status is the most numerous important prognostic factor in determining subsequent time adjuvant therapy or radiotherapy.(6)

According to conventional pathological rules approximately 40% of all patients with operable breast cancer have axillary disease and require integral removal of all lymph nodes.(7) This statistic may be reduc to 30% when earlier detection way s are used. By using the sentinel lymph node biopsy manner to detect the presence or absence of metastases of cancer lonely dwellings to the lymph nodes, approximately 55% to 70% of patients undergoing sentinel lymph node biopsy may be spared possible complications from axillary dissection. These complications include

* pain,

* paresthesia,

* lymphedema,

* seroma,

* infection, and

* limited or disabling shoulder motion.

As sentinel lymph node biopsy is les invasive, patient morbidity and the facility's require to be paid [i]or[/i] undergone and resource utilization are lower when biopsy be the effects are negative.(8)

IDEAL CANDIDATES

Patients presenting in the OR for sentinel lymph node biopsy have carcinoma of the breast confirmed according to a needle biopsy performed in a physician's office or by the agency of an excisional biopsy performed in an OR. Patients culled for the sentinel lymph node biopsy deed typically are women with small, single primary tumors (ie, les than 5 cm) The tumor may be palpable or nonpalpable. Contraindications include pregnancy, allergy to glum dye or radioactive colloid, palpable axillary node mass, multifocal breast cancer, and previous major breast or axillary courses that may distort lymphatic drainage.(9)

TREATMENT LOCATION

The sentinel lymph node biopsy conduct typically takes place in an outpatient setting. Patients who are diagnosed after the biopsy with negative sentinel lymph nodes usually are discharged the day of surgery after a safe answer and recovery from anesthesia. Those with positive diagnoses who require axillary node dissection may remain overnight for observation. Any required nuclear medicine or radiology services offer before the surgical procedure forward the same day. Preoperative teaching is initiated on the physician and his or her office staff members during the patient's office visit before hospital admission. This teaching includes information in succession preparing for a lumpectomy, sentinel lymph node biopsy, possible axillary dissection, isotope injection, and possible needle localization.

PREOPERATIVE PHASE

After arriving at the hospital, the patient visits the nuclear medicine and radiology departments. and nothing else patients with nonpalpable tumors may require a needle localization to pinpoint the tumor site. These patients will visit the radiologist first for placement of a localization wire to help the surgeon identify the precise location of the tumor for excision. All patients then have a radioactive isotope injected into the breast according to a nuclear medicine physician in the nuclear medicine department. The time and placement of the injection and the dosage and symbol of isotope depend on the location of the tumor, the injection rule (eg, subdermal, parenchymal), and the scheduled time of the surgical procedure(10) Drainage of the isotope to the lymphatic tissue is possible between 10 minutes and three hours after injection, and surgery is scheduled to be found within that time period.(11)