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OMFP

Morsicatio

QuestionAnswer
Define morsicatio: Habitual repetitive chewing of the lips (morsicatio laiorum), tongue (m. linguae), or buccal mucosa (m. buccarum)
What are the demographics of morsicatio? The lesion is more common in patients that are 35 years or older. Prevalence ranges from < 1% - > 5% of the general population. Leukoplakia is considered the most common premalignant lesion that occurs in the mouth.
What are the histologic features of morsicatio? In all types of morsicatio the epithelium will be acanthotic (epidermal hyperplasia) and demonstrate hyperparakeratosis which is shredded on the surface. A layer of bacterial colonies can be seen in the excessive parakeratin.
How would you treat morsicatio? Eliminate cause, schedule periodic follow up appointment with regular photo documentation. The lesion should be biopsied if it remains after the cause is removed.
What is the clinical appearance of morsicatio? Clinically the lesion would appear as rough, shredded surface with a white color. If the trauma is recent and/or more severe the lesion may appear erosive or ulcerated. It can be diffuse, unilateral or bilateral.
What are the differential diagnoses of morsicatio? Squamous cell carcinoma, dysplasia, lichen planus, frictional keratosis
Created by: emma.carpenter
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