Yellow pustules with a "snail-track" appearance on the oral mucosa are characteristic of:

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Pyostomatitis vegetans is a rare chronic inflammatory disorder that affects the mucous membranes, usually in the mouth. It is characterized by yellow pustules with a "snail-track" appearance. Hyperbilirubinemia is the buildup of bilirubin in the blood and is not associated with mucosal lesions. von Willebrand disease is a bleeding disorder and Hereditary hemorrhagic telangiectasia is a genetic disorder that affects blood vessels and both are not associated with oral pustules.

Yellow Pustules with a "Snail-Track" Appearance on the Oral Mucosa