Ectopic parathyroid tissue in the hypopharyngeal mucosa (pyriform sinus).
D002294:Carcinoma, Squamous Cell / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007822:Laryngeal Neoplasms / Q000473:pathology* / Q000601:surgery; D007825:Laryngectomy; D008297:Male; D008875:Middle Aged; D037981:Neck Dissection; D010280:Parathyroid Glands / Q000473:pathology*; D010610:Pharyngeal Neoplasms / Q000473:pathology* / Q000601:surgery