carcinoma in situ of hypopharynx (Monarch Disease Ontology identifier MONDO_0021288) is a in situ carcinoma that involves the hypopharynx. Also known as: carcinoma in situ of the hypopharynx, hypopharyngeal carcinoma in situ, hypopharynx carcinoma in situ, hypopharynx in situ carcinoma, stage 0 carcinoma of hypopharynx, stage 0 carcinoma of the hypopharynx, stage 0 hypopharyngeal cancer, stage 0 hypopharyngeal carcinoma.