Pathology · patient case question
All of the following are effects of chronic betel (areca) nut chewing EXCEPT:
Patient case: The Betel Quid Chewer
Patient: 44-year-old male
Chief Complaint: “One of my front teeth is much darker than the others.”
Background: Emigrated from South Asia. Chews betel quid daily for over twenty years. History of trauma to the upper front teeth in his twenties.
Medications: None
Vital Signs: BP 130/82 mmHg · HR 76 bpm · RR 16 · T 98.4°F
Findings: Generalized reddish-brown extrinsic staining of the dentition and mucosa. Gingival recession. Tooth #8 is uniformly grey-brown from within — clearly different in character from the surface staining — and did not respond to pulp testing. Root canal treatment on #8 has just been completed. The crown is otherwise intact with no caries and no restoration.
Show answer and explanation
Correct answer: C. Xerostomia
- A. This IS an effect. The abrasive quid and the slaked lime cause mechanical and chemical irritation at the site where it is habitually parked, producing localized recession and mucosal ulceration.
- B. This IS an effect. The reddish-brown to black staining of teeth, gingiva and mucosa is the most visible sign and is the reason chewers are sometimes said to have 'betel-stained' mouths.
- C. CORRECT — this is the EXCEPTION. Areca nut contains ARECOLINE, a muscarinic agonist, which STIMULATES salivary secretion. Chewers characteristically have increased salivation and expectorate frequently. Xerostomia is the opposite of what occurs.
- D. This IS an effect, and the most serious. Arecoline stimulates fibroblast collagen production, producing OSMF: progressive blanching, palpable fibrous bands, burning on spicy food and eventually trismus. It is a potentially malignant disorder with a malignant transformation rate around 7–13%.
Note: Areca nut is an IARC Group 1 human carcinogen in its own right, with or without tobacco. Screen these patients carefully at every visit — palpate for fibrous bands and measure maximum opening.