case_images: PMC10800143_01
case_images: A computed tomography (CT) scan of the neck shows a round mass obstructing the larynx from the axial view (yellow arrow) and sagittal view (red arrow).
case_images: ijo-36-371-g001.jpg
case_images: PMC10800143_01_ijo-36-371-g001.jpg
case_images: F1
case_images: Computed tomography (CT) imaging with contrast showed a well-circumscribed 4.8x3.4x2.1 cm cystic mass at the hypopharyngeal region at the level of the second and fourth cervical vertebrae that completely obstruct the upper airway passage (Figure 1). 
case_images: Direct laryngoscopy showed: (A) Smooth-surfaced tumour mass seen as a bulge that obstructs the sight of vocal cords; (B) Debulking incision to assess the base of the mass; (C) Exposure of the mass attachment to the right aryepiglottic mucosa; (D) Complete excision of the mass using the harmonic scalpel
case_images: ijo-36-371-g002.jpg
case_images: PMC10800143_01_ijo-36-371-g002.jpg
case_images: F2
case_images: Therefore, we performed initial debulking followed by excision of the remaining tumour mass using an ultrasonic harmonic scalpel (Figure 2).
case_images: Histologic results of the laryngeal schwannoma. (A) The spindle cells were placed in compact bundles with the nuclei located as a palisade from low magnification. (B) The cells are partly dispersed with foci arranged loosely. The schwannoma cells are strongly immunoreactive for S-100 protein. (C&D) 4x and 40x histological picture of the Schwannoma: The tumour cells show strong and diffuse staining for S100 protein
case_images: ijo-36-371-g003.jpg
case_images: PMC10800143_01_ijo-36-371-g003.jpg
case_images: F3
case_images: Histopathologic investigation of the tumour showed the features of non-malignant atypical neurofibroma; the result was later confirmed using S100 immunohistochemistry staining that confirmed the diagnosis of laryngeal schwannoma (Figure 3).
case_images: Flexible laryngoscope evaluation on 12th weeks after surgery: (A)&(B) Improvement of the right vocal cord mobility, no remaining mass nor sign of recurrence in the laryngeal inlet with patent upper airway; (C)&(D) Absence of tumour recurrence in the right and left arytenoid mucosa
case_images: ijo-36-371-g004.jpg
case_images: PMC10800143_01_ijo-36-371-g004.jpg
case_images: F4
case_images: The patient underwent decannulation and nasogastric tube removal in the fourth week after surgery with good swallowing function, no dyspnoea, no abnormalities in vocal cord motions, and no vocal ability after the 12th-week post-surgery (Figure 4).