PMC4767099_01
Contrast enhanced computed tomography of the neck showing a large vallecular mass
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F1
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.
Direct laryngoscopy image of the mass
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F2
A direct laryngoscopy was done which showed the mass completely blocking the airway [Figure 2].
Immunohistochemistry slide showing S-100 positive histiocytes
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F3
The diagnosis of RDD was established by histopathology and immunehistochemistry of S-100 and CD-68 positive histiocyte cells [Figure 3].