Subglottic Squamous Cell Carcinoma: A Population-Based Study of 889 Cases

Area of Science:

• Oncology
• Laryngology
• Cancer Research

Background:

• Subglottic squamous cell carcinoma (SCCa) is a rare laryngeal malignancy.
• It is associated with poorer survival outcomes compared to SCCa in other laryngeal regions.
• Patients often present with advanced stage disease.

Purpose of the Study:

• To analyze the largest cohort of subglottic SCCa cases to date.
• To investigate patient demographics, treatment patterns, and survival outcomes.
• To identify factors influencing survival in subglottic SCCa.

Main Methods:

• Analysis of the US National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) database.
• Inclusion of 889 cases of subglottic SCCa diagnosed between 1973 and 2011.
• Data analysis included patient demographics, treatment modalities, and survival outcomes.

Main Results:

• The mean age at diagnosis was 65.7 years, with a strong male predilection (3.83:1 male:female ratio).
• The majority of patients (64.4%) presented with American Joint Committee on Cancer stage III and IV disease.
• The most common treatment was surgery with radiotherapy (38.8%), followed by radiotherapy alone (33.9%) and surgery alone (17.0%).
• Overall 5-year disease-specific survival was 53.7%.
• No statistically significant differences in 5-year disease-specific survival were observed between treatment modalities (surgery alone: 62.4%; radiotherapy alone: 56.7%; surgery with adjuvant radiotherapy: 55.1%).

Conclusions:

• This study represents the largest cohort of subglottic SCCa, highlighting a strong male predilection in the US.
• Surgery with adjuvant radiotherapy was the most frequent treatment approach.
• No statistically significant differences in 5-year disease-specific survival were found based on the treatment modality used.