What is the most likely reason for the enlargement of the tongue in a patient?

Macroglossia (enlargement of the tongue) is a characteristic feature of amyloidosis, a condition where amyloid proteins deposit abnormally in tissues. Tongue enlargement can also affect speech and swallowing. Other systemic signs of amyloidosis may include organ enlargement or dysfunction. Hyperthyroidism can cause mild tissue changes but is not typically associated with macroglossia. Cushing's syndrome involves excessive cortisol and does not lead to tongue enlargement. Rheumatoid arthritis affects joints, not the tongue.