Patients with<unk>  often have a burning sensation with the tongue and oral mucosa, and atrophy of lingual papillae produces a smooth, shiny, red, dorsum of the tongue. Symptoms include: * Dysphagia (difficulty swallowing) * Pain * Weakness * Odynophagia (painful swallowing) * Atrophic glossitis * Angular cheilitis * Koilonychia (Abnormally thin nails, also called spoon nails) * Splenomegaly (an enlarged spleen). * Upper esophageal webs (post cricoid region - contrasts with Schatzki rings found at the lower end of esophagus). Serial contrasted gastrointestinal radiography or upper-gastrointestinal endoscopy may reveal the web in the esophagus. Blood tests demonstrate a hypochromic microcytic anemia that is consistent with an iron-deficiency anemia. Biopsy of involved mucosa typically reveals epithelial atrophy (shrinking) and varying amounts of submucosal chronic inflammation. Epithelial atypia or dysplasia may be present. It may also present as a post-cricoid malignancy which can be detected by loss of laryngeal crepitus. Laryngeal crepitus is found normally and is produced because the cricoid cartilage rubs against the vertebrae.
Plummer–Vinson syndrome
Bloom syndrome
Mallory–Weiss syndrome
Secretan's syndrome
Mucus fishing syndrome
König's syndrome
Zenker's diverticulum
Schnitzler syndrome