Goitre: a cause of obstructive sleep apnoea in euthyroid patients.

While hypothyroidism is considered to predispose to obstructive sleep apnoea (OSA), the presence of a goitre itself is not a recognized cause of OSA. We present the cases of two euthyroid patients with large goitres and clinical evidence of OSA, whose OSA symptoms significantly improved following partial thyroidectomy. This finding suggests that the goitre contributed to their symptoms.