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Indication and extent of lymph node dissection in differentiated thyroid carcinoma are still subject to controversy. The overall favourable prognosis, low study numbers and the different biological features of papillary and follicular carcinoma lead to few evidence-based recommendations and a low level of evidence. The different therapeutic and operative strategies are illustrated on the principles of evidence-based medicine. MATERIAL AND
A literature search was carried out in Medline and EMBase using the keywords differentiated / papillary / follicular thyroid carcinoma, lymphadenectomy, lymph node dissection.
Eleven retrospective studies outline the effect of prophylactic vs. no lymph node dissection on tumour relapse rate and long-term survival. Six of these studies combine PTC and FTC. A minor evidence-based recommendation for prophylactic cervico-central lymph node dissection in PTC can be given (evidence level 3). Lymph node dissections involving the cervico-lateral compartment can be recommended in the case of clinically pathological findings at the lymph nodes (evidence level 3). A prophylactic mediastinal lymph node dissection is not indicated (evidence level 4), a therapeutic mediastinal LAD cannot be recommended because of higher morbidity and mortality (evidence level 3).
3 retrospective studies outline the effect of prophylactic lymph node dissection on tumour relapse rate and long-term survival. Based on these, a recommendation for prophylactic cervico-central systematic lymph node dissection can be given for invasive follicular carcinoma (evidence level 3). There is no indication for prophylactic cervico-lateral or mediastinal lymph node dissection (evidence level 3).
The following recommendations can be given in differentiated thyroid carcinoma: In the case of clinically pathological findings in cervical lymph nodes, a systematic lymph node dissection of the lateral and central compartment is indicated (evidence level 3). Prophylactic cervico-central lymph node dissection is recommended for PTC larger than 10 mm in diameter and invasive FTC, a cervico-lateral or mediastinal prophylactic lymph node dissection is not indicated (evidence level 3). In papillary microcarcinoma and minimally invasive follicular carcinoma, a prophylactic lymph node dissection is not indicated (evidence level 3).
Chirurgische Universitätsklinik Freiburg, Allgemein- und Viszeralchirurgie, Freiburg, Deutschland.
This article was published in the following journal.
Name: Zentralblatt fur Chirurgie
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To evaluate the interaction between extent of lymph node dissection (LND) and overall survival (OS) in patients with various histologic types of uterine cancer.
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Dissection in the neck to remove all disease tissues including cervical LYMPH NODES and to leave an adequate margin of normal tissue. This type of surgery is usually used in tumors or cervical metastases in the head and neck. The prototype of neck dissection is the radical neck dissection described by Crile in 1906.
Malignant lymphoma in which the lymphomatous cells are clustered into identifiable nodules within the LYMPH NODES. The nodules resemble to some extent the GERMINAL CENTER of lymph node follicles and most likely represent neoplastic proliferation of lymph node-derived follicular center B-LYMPHOCYTES.
A diagnostic procedure used to determine whether LYMPHATIC METASTASIS has occurred. The sentinel lymph node is the first lymph node to receive drainage from a neoplasm.
The historic designation for scrofula (TUBERCULOSIS, LYMPH NODE). The disease is so called from the belief that it could be healed by the touch of a king. This term is used only for historical articles using the name "king's evil", and is to be differentiated from scrofula as lymph node tuberculosis in modern clinical medicine. (From Webster, 3d ed)
Infection of the lymph nodes by tuberculosis. Tuberculous infection of the cervical lymph nodes is scrofula.
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