History of Previous Surgical Resection Promotes the Sclerosis of the Arytenoid Cartilage in Patients With Laryngeal Contact Granuloma.

OBJECTIVES: To explore the relationship between arytenoid cartilage sclerosis and a history of previous surgical resection in patients with laryngeal contact granuloma. METHODS: 167 patients with laryngeal contact granuloma treated from March 2016 to December 2018 were studied. The high-resolution computed tomography (HRCT) data of the sclerosis of arytenoid cartilage is divided into asymmetric sclerosis, bilateral sclerosis, and no sclerosis according to the range of sclerosis. The proportions of various ranges of sclerosis in two subgroups of patients were compared to patients with and without a history of previous surgical resection. RESULTS: The arytenoid cartilage sclerosis rate of 167 patients was 69.46%. The exact probability method showed that P < 0.001, suggesting that the distribution of arytenoid cartilage sclerosis was different in patients with and without a history of previous surgical resection, and there was a moderate correlation between the extent of arytenoid sclerosis and history of previous surgical resection (Cramer's V = 0.436, P < 0.001). There were 18 cases of bilateral sclerosis in patients with a history of previous surgical resection, of which 50% had contralateral recurrence after combined therapy (proton pump inhibitor (PPI) and glucocorticoid injection into granuloma via the thyrohyoid membrane approach), accounting for 75% of recurrence after combined therapy. CONCLUSION: Surgery promotes the expansion of arytenoid sclerosis, Patients with bilateral arytenoid sclerosis are prone to recurrence of contralateral laryngeal contact granuloma.