OROPHARYNGEAL adenoid cystic carcinoma shows distinct clinical patterns and poor outcomes in a new systematic review.
Oropharyngeal Adenoid Cystic Carcinoma Patterns
A systematic review of oropharyngeal adenoid cystic carcinoma has highlighted a rare but clinically challenging malignancy, with findings suggesting a predilection for the base of the tongue, frequent nodal involvement, and substantial long-term disease progression.
The review included 44 articles and 195 patients after investigators screened 233 unique citations. Eligible studies included clinical trials and observational studies that reported clinical features, treatment, or outcomes for oropharyngeal adenoid cystic carcinoma. The authors followed Preferred Reporting Items for Systematic Reviews and Meta-analyses guidance, with searches conducted across Ovid MEDLINE, Ovid Embase, Ovid Cochrane Central Register of Controlled Trials, and Scopus.
Among patients with available data, the female-to-male ratio was 1.7:1. The base of the tongue was the most common oropharyngeal subsite, accounting for 73% of cases. However, the authors cautioned that this apparent pattern should be interpreted carefully because of the high proportion of missing data.
Symptoms, Treatment, And Metastatic Spread
Presenting symptoms were most often pain or discomfort, reported in 31 patients, followed by a palpable mass in 19 patients and dysphagia in 12 patients. At diagnosis, 29 patients, or 22.3%, had positive lymph nodes, suggesting that oropharyngeal adenoid cystic carcinoma may carry a higher risk for nodal metastases than clinicians might expect in this rare setting.
Treatment was primarily surgical, with 102 patients undergoing surgery. Definitive radiation therapy was used in 58 cases. Disease progression was reported in 86 patients, and 31 of these patients, representing 36%, developed distant metastases. The lungs were the predominant metastatic site, documented in 26 patients.
Long-Term Outcomes Remain Concerning
Long-term outcomes were available for 76 patients. Reported 3-year overall survival ranged from 71.5% to 100%, while 5-year overall survival ranged from 47.6% to 79.0%. Disease-free survival was lower, with 3-year rates ranging from 54.7% to 70.0% and 5-year rates ranging from 21.9% to 44.0%.
These findings underscore the need for careful staging, long-term surveillance, and multidisciplinary management in patients with oropharyngeal adenoid cystic carcinoma. Although the evidence base remains limited by missing data and the rarity of the disease, the review suggests that clinicians should remain alert to nodal disease, distant metastases, and delayed progression when assessing treatment strategies and follow-up planning.
Reference
Hernandez-Herrera GA et al. Clinical Features, Treatment, and Outcomes for Oropharyngeal Adenoid Cystic Carcinoma: A Systematic Review. Otolaryngol Head Neck Surg. 2026;doi: 10.1002/ohn.70319.
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