<prompt> Secretory sinus in neck, moving upon deglutination:Branchial sinusPilonidal cystThyroglossal fistulaSublingual dermoid cyst  <response>: Ans. c Thyroglossal fistulaRef: Dhingras ENT 5th ed. 398 Sublingual dermoid cyst present as midline submental swelling. This cyst is not attached to foramen cecum and hence doesnt move upon tongue protrusion or upon deglutition. The thyroglossal cyst classically moves upwards with swallowing and notably with tongue protrusion, as it is attached to foramen cecum. It merely indicates attachment to the hyoid bone. 