Twenty-three cases of pleomorphic adenoma were treated at our department in the past six years.
Thirteen cases of pleomorphic adenoma originated from the parotid gland, three from the palate, two from the lips, one each from the nasal cavity, larynx, external auditory meatus, pharynx and right neck.
Pleomorphic adenomas of the parotid gland and palate are found relatively frequently, but cases in the nasal cavity, larynx and external auditory meatus are rare.
Only two cases of pleomorphic adenoma of the lips were found in otolaryngological literatures in Japan, though oral surgeons find more cases in the oral cavities than we otolaryngologists do.
There were 10 males and 13 females indicating no distinct sex difference.
Age distribution was from 18 to 62 with an average being 39.
Pathologically, pleomorphic adenomas usually have smooth surface, clear border with no adhesions, hard elasticity and a capsule.
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