The characteristics of the sentinel lymph node metastasis in predicting the axillary lymph node status in patients with breast carcinoma.

INTRODUCTION: Lymph node metastases are the most significant prognostic factors in patients with breast carcinoma. A positive sentinel lymph node (SLN) biopsy is followed by an axillary lymph node (ALN) dissection. In sentinel lymph node negative cases the risk of positive non-sentinel ALN is very low though not absent. The aim of this study was to determine predictive factors for non-sentinel lymph node metastases on the basis of sentinel lymph node metastasis characteristics as well as features of the primary tumour. MATERIAL AND METHODS: 128 patients who had a positive SLN biopsy for breast carcinoma in 2005-2007 were identified. The breast carcinoma metastases in each SLN were assessed according to their location within the node (subcapsular, mixed subcapsular and parenchymal, parenchymal, multifocal or extensive) and metastatic infiltration of perinodal tissue was also reported. These data were correlated with the ALN involvement and characteristics of the primary tumour. RESULTS: The strong predictors of the ALN metastasis included the SLN metastasis diameter (7.6 vs. 4.4 mm) and size classified according to WHO classification (ITC 0 vs. 100%, micrometastasis 23.5 vs. 76.5%, macrometastasis 51.9 vs. 48.1%). The SLN metastases with a diameter of above 3 mm were associated with approximately twice more frequent ALN metastases. In an extensive location of SLN metastasis the highest percentage of ALN metastases was found (65 vs. 35%). The weak predictors of ALN metastases were: primary tumor diameter (> 2 cm), immunohistochemical HER2 positive status, infiltration of sentinel perinodal tissue by metastasis, histological primary tumour grade. CONCLUSIONS: Some additional details, which can be easily evaluated in a routine SLN examination in breast carcinoma, have a predictive value of the ALN metastatic status and should be included in the histopathological report.

History of voice rehabilitation following laryngectomy.

INTRODUCTION: The history of voice rehabilitation following laryngectomy is as long as the history of laryngectomy itself. The multitude of methods which have been employed to reduce the disability associated with the loss of the larynx, illustrate the difficulty of finding an optimal method of reestablishing verbal communication while preserving the ability to breathe and swallow. MATERIAL AND METHODS: The world literature was reviewed using various Internet and medical search engines and library facilities. Landmark articles were identified and summarized. RESULTS: A coherent history of voice rehabilitation following laryngectomy was constructed. DISCUSSION: The methods employed to reestablish voice after extirpation of the larynx may be grouped into the categories of: esophageal speech, surgical methods of creating competent tracheo-pharyngeal shunts to create lung powered voice with and without the use of prosthetic devices to prevent aspiration, "near-total" resection of the larynx with dynamic phonatory shunt, and the use of external pneumatic or electrical devices to create sound which is then transmitted through the oral cavity and pharynx. CONCLUSION: For the past two decades, simple shunt devices inserted either primarily, at the time of laryngectomy, or later as a secondary procedure, have mainly supplanted the other methods of voice rehabilitation, with the exception of an occasional patient who has acquired good esophageal speech, or for whom external devices may be the only practical method of voice production.

European surgeons were the first to perform neck dissection.

The history of the surgical treatment of cervical lymph node metastases began in the 19th century, and, unfortunately, the initial attempts at surgical treatment of neck metastases were disastrous. Although some European surgeons reported few cases of radical en bloc dissection, the first successful surgical procedure was performed and described in detail by Franciszek Jawdynski, a Polish surgeon, in 1888. George Washington Crile popularized and illustrated radical en bloc neck dissection in the early 20th century.

Neck dissection: then and now.

The significance of metastatic disease in the lymph nodes of the neck as a critical independent prognostic factor in head and neck cancer has long been appreciated. Although 19th century surgeons attempted to remove involved cervical lymph nodes at the time of resection of the primary cancer, a systematic approach to en bloc removal of cervical lymph node disease, described in detail by Jawdynski in 1888 and popularized and illustrated by Crile in the early 20th century, provided consistent and more effective treatment, and forms the basis of our current techniques. During the first half of the 20th century, developments included preservation of the accessory nerve in selected cases, elective neck dissection performed in association with resection of various primary tumors, bilateral neck dissection and limited neck dissection. The greatest impetus to the status of radical neck dissection came from Martin, whose technique consisted of resection of all lymph nodes from level I-V together with the accessory nerve, internal jugular vein, sternocleidomastoid muscle and various other structures in a single block of resected tissue. Martin's technical precepts were followed until the latter part of the 20th century when modifications in technique began to find general acceptance. The first description of an effective technique of modified radical neck dissection was published in Spanish by Suárez, in 1963. This technique, which preserves important structures, such as the internal jugular vein, sternocleidomastoid muscle and accessory nerve, was refined and popularized by various authors who published their results in the English language literature during the period from 1964 through 1990 and beyond. Modified or "functional" neck dissection avoids much of the morbidity of radical neck dissection while achieving equivalent degrees of control of regional disease in properly selected cases. By the late 20th century, the concept of selective neck dissection, consisting of resection of only the nodal groups at greatest risk for metastasis from a given primary site, was studied and developed. These limited dissections are now widely employed for elective, and in properly selected cases, therapeutic treatment and staging of the neck, and have been proposed for limited cervical recurrences after various chemoradiation protocols. Prospective studies have demonstrated similar rates of neck recurrence and survival after elective selective neck dissection compared to elective modified radical neck dissection. Other modifications and factors applied to treatment of cervical lymph node disease include the use of adjuvant and neo-adjuvant radiation and chemotherapy, a revised system for classification of neck dissections, the identification of various adverse prognostic factors such as extracapsular spread and extranodal soft tissue deposits, application of sentinel lymph node biopsy to staging of the neck, the use of immunohistochemical and molecular techniques for identification of lymph node metastases not detectable by light microscopy, and the possibility of endoscopic neck dissection. The authors conclude that neck dissection, as evolved over the past century, is a fundamental tool in management of patients with head and neck cancer, but is still a work in progress.

Ciclosporina: estudios experimentales y aplicación clínica en trasplante de organos / Cyclosporin: experimental studies and clinical applications in organ transplantation

La ciclosporina es un agente inmunosupresor muy potente cuya eficacia ha sido ampliamente demostrada en animales de laboratorio y en la prática clínica. El medicamento actúa bloqueando las fases tempranas de la activación celular que despiertan los antígenos o mitógenos. La ciclosporina, a través de su efecto sobre mediadores humorales llamados linfocinas, inhibe la aparición de linfocitos T-citotóxicos, permitiendo la emergencia del mecanismo supresor de la respuesta inmune. Esta acción selectiva resulta en un estado tolerante de los receptores de alotrasplantes. El uso clínico de la ciclosporina combinado con esteroides, ha mejorado la sobrevida de trasplante de riñón, corazón e hígado, cuando se comparan los resultados obtenidos con los esquemas de inmunosupresión previa. La ciclosporina es un arma efectiva para el tratamiento de los enfermos que reciben trasplantes de órganos