Facial nerve palsy following parotid gland surgery: A machine learning prediction outcome approach.

Introduction: Machine learning (ML)-based facial nerve injury (FNI) forecasting grounded on multicentric data has not been released up to now. Three distinct ML models, random forest (RF), -nearest neighbor, and artificial neural network (ANN), for the prediction of FNI were evaluated in this mode.

Methods: A retrospective, longitudinal, multicentric study was performed, including patients who went through parotid gland surgery for benign tumors at three different university hospitals.

[Hypopharyngeal cancer: analysis of the evolution and treatment results].

Objective: Hypopharyngeal carcinoma is an aggressive malignancy usually diagnosed at a late state, thereby resulting in overall poor prognosis and low survival rates for these patients. The purpose of this study is to present the progress and outcomes of patients treated for hypopharyngeal carcinoma at our department.

Material And Method: We retrospectively reviewed 89 patients who had been diagnosed with hypopharygeal carcinoma between 1980 and 2005.

[Malignant multiple neoplasms in head and neck squamous cell carcinoma].

Introduction: The incidence of multiple malignant neoplasms in the upper aerodigestive tract is high and ranges from 7% to 20%. We make a retrospective study to evaluate the incidence of multiple malignant neoplasms in head and neck squamous cell carcinomas, their main characteristics and survival.

Material And Method: We studied 103 multiple malignant neoplasms from an oncological database of 1330 patients with head and neck squamous cell carcinomas.

[Hemithyroidectomy: when it is necessary an intraoperative frozen-section biopsy?].

Introduction: Many surgeons use intraoperative frozen section biopsy of the thyroid nodules to confirm malignant disease, but it continues to generate considerable controversy. We reviewed our recent experience to determinate de clinical utility of frozen section in our surgical management and intraoperative decision-making.

Patients And Method: All patients who had operations for the thyroid nodular disease between 2000 and 2006 were included in this retrospective study.

[Revision stapedectomy].

Objective: The aim of the study was to determine the causes of failure in otosclerosis surgery.

Material And Method: We performed 23 revisions of stapedectomy during the period between January 2000 and April 2005. The time between the primary surgery and the revision surgery ranged from 3 months to 25 years.