Local morphologic changes related to laryngeal carcinoma.

Area of Science:

• Otolaryngology
• Pathology
• Oncology

Background:

• Laryngeal carcinoma treatment often involves laryngectomy, but the extent of morphologic changes in the laryngeal epithelium distant from the primary tumor is not fully understood.
• Investigating these changes can provide insights into the pathogenesis and field effect of laryngeal cancer.

Purpose of the Study:

• To investigate the morphologic changes in the laryngeal epithelium and salivary glands at a distance from the primary laryngeal carcinoma.
• To determine if laryngeal cancer can be considered an organ disease due to widespread changes.

Main Methods:

• Whole organ serial sections were used to examine the larynges of 178 patients who underwent partial or total laryngectomy for laryngeal carcinoma.
• Histopathological analysis focused on epithelial changes (metaplasia, dysplasia, carcinoma in situ) and salivary gland alterations.

Main Results:

• Extensive squamous metaplasia was observed in 60 cases, hyperplastic epithelium in 24, and dysplasia in 29.
• Foci of in situ carcinoma, second primary carcinomas, and synchronous laryngoceles were also noted.
• Salivary glands showed reserve cell hyperplasia (100%), squamous metaplasia (25%), and oncocytic metaplasia (14%).

Conclusions:

• Laryngeal cancer exhibits a field effect, acting as an organ disease with oncogenic stimuli affecting all laryngeal structures.
• These widespread lesions, ranging in severity, support the concept of the larynx as a target organ for neoplastic processes.