sentinel node biopsy


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biopsy

 [bi´op-se]
removal and examination, usually microscopic, of tissue from the living body, often to determine whether a tumor is malignant or benign; biopsies are also done for diagnosis of disease processes such as infections.
Technique for endometrial biopsy. Longitudinal strips of the endometrium are sampled using an in-and-out and rotational motion. From Rakel, 2000.
aspiration biopsy one in which tissue is obtained by application of suction through a needle attached to a syringe.
brush biopsy one in which the sample is obtained by a brush with stiff bristles introduced through an endoscope, such as for a tissue sample from an inaccessible place such as the renal pelvis or bronchus.
chorionic villus biopsy chorionic villus sampling.
cone biopsy one in which an inverted cone of tissue is excised, as from the uterine cervix.
endoscopic biopsy removal of tissue by instruments inserted through an endoscope.
excisional biopsy removal of biopsy tissue by surgical cutting, such as a lumpectomy.
fine-needle aspiration biopsy aspiration biopsy using a fine needle. For superficial tissue such as the thyroid, breast, or prostate the needle is unguided, but for deep tissue it must be guided radiologically.
incisional biopsy biopsy of a selected portion of a lesion.
needle biopsy (percutaneous biopsy) one in which tissue is obtained by insertion through the skin of a special type of needle (see biopsy needle).
punch biopsy one in which tissue is obtained by a punch-type instrument.
sentinel node biopsy biopsy of a sentinel node (the first lymph node to receive lymphatic drainage from a malignant tumor). It is identified as follows: a dye and a radioactive substance are injected into the body, which causes certain nodes to “light up” like a sentinel, indicating that they are the most appropriate ones for examination. They are detected by both the light created by the dye and the radioactive substance that is monitored by a gamma camera. If the sentinel nodes do not contain malignant cells, this usually eliminates the need for removal of more distal nodes. Called also intraoperative lymphatic mapping.
shave biopsy biopsy of a skin lesion by excising it with a cut parallel to the surface of the surrounding skin.
stereotactic biopsy biopsy of the brain using a stereotactic technique to locate the biopsy site. This can be done as a minimally invasive surgery technique. The patient's head is held in a special rigid frame so that a probe can be directed into the brain through a small hole in the skull.
sternal biopsy biopsy of bone marrow of the sternum removed by puncture or trephining; see also sternal puncture.

sentinel node biopsy

biopsy preceded by injection of a dye or radioisotope adjacent to a tumor to identify for excision the primary nodes draining the area; used to determine the presence of lymph node metastasis without removing the entire lymph node basin.

sentinel node biopsy

biopsy of a sentinel node (the first lymph node to receive lymphatic drainage from a malignant tumor). The node is identified as follows: a dye and a radioactive substance injected into the body cause certain nodes to "light up" like sentinels, indicating that they are the most appropriate ones for examination. They are detected by both the light created by the dye and the radioactive substance that is monitored by a gamma camera. If the sentinel nodes do not contain malignant cells, the necessity for removal of more distal nodes is essentially eliminated. Also called intraoperative lymphatic mapping.

sen·ti·nel node bi·op·sy

(sen'ti-nĕl nōd bī'op-sē)
Procedure preceded by injection of a dye or radioisotope proximal to a tumor to identify for excision the primary node draining the area; used to determine the extent of spread of a malignancy.

sentinel node biopsy

The identification and removal for examination of the SENTINEL NODE using a hand-held gamma-ray detector probe. It is claimed that examination of this single lymph node can accurately predict in 97.5 per cent of cases whether or not a breast cancer has spread to the lymph nodes. The false negative rate is 4.6 per cent. The method has also been used in the management of malignant melanoma. The sentinel node biopsy concept was originated by Professor Umberto Veronesi of the European Institute of Oncology, Milan, Italy.

Sentinel node biopsy

A newer procedure performed in order to determine whether breast cancer has spread to auxiliary (underarm) lymph nodes. A blue radioactive tracer and/or blue dye is injected into the area of the breast tumor. The lymphatic vessels carry the dye or radioactive material, to a "sentinel node". This sentinel node is thought to be the first lymph node receiving fluid from the tumor and the one most likely to contain cancer cells if the cancer has spread. Only if the sentinel node contains cancer cells are more lymph nodes removed.
Mentioned in: Lymphedema
References in periodicals archive ?
Nodal Staging in Penile Carcinoma by Dynamic Sentinel Node Biopsy After Previous Therapeutic Primary Tumour Resection.
Modern management of the above example would entail wide excision with a 2-cm margin and a simultaneous sentinel node biopsy.
Guidelines for sentinel node biopsy and lymphatic mapping of patients with breast cancer.
Selective neck dissection and sentinel node biopsy in head and neck squamous cell carcinomas.
The benefit is the sentinel node detection rate and accuracy of the method of lymphatic mapping for sentinel node biopsy in relation to melanoma, breast cancer and other solid malignancies.
This was considered the cut-off point because patients with deeper lesions usually go on to have a wide excision and sentinel node biopsy, Dr.
Randomized multicenter trial of sentinel node biopsy versus standard axillary treatment in operable breast cancer: the ALMANAC trial.
While sentinel node biopsy results in considerably less morbidity than ALNC [3], it does require radioisotope and/or blue dye injection, and usually general anaesthesia.
Less Invasive Surgical Technique: Sentinel Node Biopsy -- If diagnosed with early stage breast cancer, discuss this surgical option with your physician.
General subjects include training and techniques in general surgery (on virtual reality simulation and the use of drains), general abdominal surgery (laparoscopic techniques for the acute abdomen and procedures to follow after kidney or liver transplantation), vascular surgery (stroke and cerebrovertebral reconstruction after stroke), sentinel node biopsy in breast surgery and current evidence from randomized trials.
Sentinel node biopsy has helped to limit extensive node dissections for selected high-risk patients, sparing most patients the potential morbidity of these dissections.