case_images: PMC4767099_01
case_images: Contrast enhanced computed tomography of the neck showing a large vallecular mass
case_images: AER-10-139-g001.jpg
case_images: PMC4767099_01_AER-10-139-g001.jpg
case_images: F1
case_images: Contrast enhanced computed tomography (CECT) [Figure 1] showed a large mass of size 3.4 cm x 3.7 cm x 2.7 cm in hypopharynx, extending toward right side filling the valleculae, and posteriorly up to inlet of larynx.
case_images: Direct laryngoscopy image of the mass
case_images: AER-10-139-g002.jpg
case_images: PMC4767099_01_AER-10-139-g002.jpg
case_images: F2
case_images: A direct laryngoscopy was done which showed the mass completely blocking the airway [Figure 2].
case_images: Immunohistochemistry slide showing S-100 positive histiocytes
case_images: AER-10-139-g003.jpg
case_images: PMC4767099_01_AER-10-139-g003.jpg
case_images: F3
case_images: The diagnosis of RDD was established by histopathology and immunehistochemistry of S-100 and CD-68 positive histiocyte cells [Figure 3].