Axillary Dissection Based on the Histological Result of the Sentinel Node, in Patients With Breast Carcinoma

Inclusion Criteria:

* Age between 40 and 75 years.
* Clinical, mammographic or ultrasonographic diagnosis of a unicentric carcinoma with an ultrasonographic diameter of equal or less than 2.0 cm.
* Although not a factor of exclusion, a breast scintigraphy using MDP-99m is recommended for accurate determination of possible multifocality or multicentricity of the tumor, as well as for the determination of possible bone metastasis.
* Axillary lymph nodes that cannot be palpated or that are not clinically suspicious for metastasis.
* No previously executed therapy (including biopsy) at any outside institution.
* Those patients with nonpalpable lesions will be subjected to preoperative radioactive occult lesion localization (ROLL) or stereotactic biopsy.
* Adequate patient information and signature of the informed consent.

Exclusion Criteria:

* Lesions diagnosed as non-infiltrating (in-situ) ductal or lobular carcinoma.
* Paget's disease.
* Documented multicentricity and/or abundant multifocality of the neoplasm.
* Clinically metastatic lymph nodes.
* Patients previously biopsied at other institutions.
* Carcinomas detected during pregnancy or lactation.
* Histotypes diverse from breast carcinoma lesions.
* History of previous malignancy (excluding basocellular carcinoma, in-situ cervical carcinoma and/or contralateral breast carcinoma without recurrence for at least 15 years of follow-up).