L-thyroxine responsive cricopharyngeal achalasia associated with hypothyroidism in a dog

Y. Bruchim*, A. Kushnir, M. H. Shamir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


An eight-year-old, male boxer dog was presented with a one-month history of hindlimb weakness followed by compulsive ineffective drinking, dysphagia, regurgitation and nasal reflux during drinking. A neurological examination revealed weakness and conscious proprioception deficits in both hindlimbs with normal spinal reflexes. The dog's swallowing function was examined by fluoroscopy. This showed normal prehension of the barium paste, bolus formation and contraction of the pharyngeal muscle, but no opening of the upper oesophageal sphincter was detected. A serum thyroid stimulating hormone level of 0.402 ng/dl and serum total T4 of 0.01 μg/dl were determined. The dog fully recovered one month after L-thyroxine therapy. The association found between cricopharyngeal achalasia and hypothyroidism suggests that hypothyroidism should be included in the list of differential diagnoses for dogs with cricopharyngeal achalasia.

Original languageAmerican English
Pages (from-to)553-554
Number of pages2
JournalJournal of Small Animal Practice
Issue number11
StatePublished - Nov 2005


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