Pleomorphic adenoma in tonsil.

Salivary tumors that involve the tonsil are rare, representing 0.5% of salivary neoplasms. Most tumors arise from the parotid glands.

Morphological Evaluation of Thyroid Cartilage Invasion in Early Glottic Tumors Involving the Anterior Commissure.

Introduction: The anterior commissure is an area of glottic cancer infiltration, even in early stages.

Objective: To evaluate the invasion by tumors into the anterior commissure cartilage in surgical specimens of frontolateral laryngectomy.

Methods: Forty-eight patients who had undergone frontolateral laryngectomy for T1b/T2 squamous cell carcinoma were included.

The role of E-cadherin and β-catenin in laryngeal cancer.

Epithelial cadherins with catenins form the E-cadherin-catenin complex that acts on cell-to-cell adhesion. The loss of these complex lead to the reduction or absence of epithelial cadherin expression in the cell membrane, cytoplasmic accumulation of β-catenin and its translocation to the nucleus, contributing to carcinogenic events. The objective of this study was to evaluate the expression of epithelial cadherin and β-catenin in patients with laryngeal tumor.