Videolaryngostroboscopy versus microlaryngoscopy for the diagnosis of benign vocal cord lesions: a prospective clinical study

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Abstract
The aim of this study is to prospectively compare rigid videolaryngostroboscopy with microlaryngoscopy for the diagnosis of benign vocal cord lesions. Eighty-five adult patients with benign vocal cord lesions were evaluated with videolaryngostroboscopy and later underwent microlaryngoscopy. During microlaryngoscopy, systematic examination of the glottis was conducted, including careful inspection and meticulous palpation of the vocal cords from anterior commissure to arytenoids. Preoperative and intraoperative diagnoses were analyzed. One hundred and forty-one lesions were diagnosed preoperatively with rigid videolaryngostroboscopy in 85 patients. Microlaryngoscopy revealed a total of 199 lesions in these patients, demonstrating a 41.1 % higher diagnostic yield. Forty-five (77.6 %) of the 58 additional lesions involved structural abnormalities, including sulcus vocalis, microwebs, vascular ectasia, mucosal bridges, and anterior web. The preoperative diagnosis was consistent with the postoperative diagnosis in only 29 patients (34.2 %). For the rest of the patients (n = 56, 65.8 %), the preoperative diagnosis was either changed, or new lesions were identified during microlaryngoscopy. Intraoperative diagnosis of benign vocal cord lesions differs significantly from preoperative diagnosis, regarding both the type and number of lesions present. A large proportion of patients diagnosed with videolaryngostroboscopy have additional lesions, particularly structural abnormalities. Precise inspection and palpation of vocal cords are thus essential during microlaryngoscopy.

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