Oral Manifestations of HIV
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Direct answer
Oral lesions are often the first clinical sign of HIV infection and cluster predictably as immunity falls: the EC-Clearinghouse/WHO classification (1993) ranks lesions strongly associated — candidiasis (erythematous and pseudomembranous), hairy leukoplakia, Kaposi sarcoma, linear gingival erythema, necrotising gingivitis and periodontitis, non-Hodgkin lymphoma — against less commonly associated lesions (atypical ulcers, salivary gland disease, thrombocytopenic purpura) and others seen with some frequency. Erythematous candidiasis is the commonest lesion overall, hairy leukoplakia of the lateral tongue (EBV-driven, corrugated, non-wipeable) signals falling CD4 counts, Kaposi sarcoma (HHV-8) presents as red-purple macules and plaques favouring the palate, and necrotising periodontitis destroys attachment in days. In India, where NACO-run programmes guide management, unexplained major aphthae, candidiasis without predisposition, or hairy leukoplakia in any adult mandates HIV testing — the dentist is often the first to make the diagnosis.
What you must remember
- Strongly associated lesions (EC-Clearinghouse 1993): candidiasis, hairy leukoplakia, Kaposi sarcoma, linear gingival erythema, necrotising gingivitis and periodontitis, and non-Hodgkin lymphoma.
- Erythematous candidiasis: the commonest HIV-related oral lesion — red, flat patches on palate and tongue dorsum, sometimes burning; pseudomembranous thrush also common; both respond to fluconazole and indicate HIV testing when unexplained.
- Oral hairy leukoplakia: EBV-driven hyperplasia — not premalignant, does not wipe off, classically bilateral lateral tongue borders with corrugated striae; a surrogate of declining immunity that regresses with antiretroviral therapy; histology shows koilocyte-like cells with EBV demonstrable by in-situ hybridisation.
- Kaposi sarcoma: HHV-8-associated vascular tumour; hard palate first, then gingiva; red-purple macules, plaques or nodules that do not blanch; biopsy shows spindle cells with slit-like vascular spaces and extravasated erythrocytes; oral KS is an AIDS-defining illness.
- Periodontal spectrum unique to HIV: linear gingival erythema — a red band along the free gingival margin refractory to hygiene (Candida-linked); necrotising ulcerative gingivitis with punched-out interdental necrosis; necrotising ulcerative periodontitis — rapid attachment and bone loss, "bone appearing through the gum", marking advanced immunosuppression.
- Less commonly associated: parotid lymphoepithelial cysts and xerostomia; atypical and CMV-driven ulcerations; thrombocytopenic purpura; slow-healing herpetic lesions; diffuse pigmentation (zidovudine and other antiretrovirals).
- Paediatric HIV: candidiasis, parotid enlargement, herpetic and aphthous lesions, and early childhood caries — India's vertically infected cohort presents in dental chairs more often than recognised.
- Management framework: antiretroviral therapy is disease-modifying for hairy leukoplakia, KS and the necrotising periodontitides; dental care follows universal precautions (every patient, every visit — not "HIV patients only"); adult candidiasis or hairy leukoplakia without explanation equals an HIV test offer.
A typical diagnostic pathway
A 32-year-old presents with a three-week burning mouth, red palatal patches, a removable white plaque, and corrugated whitening of both tongue borders. Candidiasis with a hairy-leukoplakia-like change is, in an adult without diabetes, antibiotics or steroid inhalers, an HIV indicator condition — the act is a confidential, consented HIV test with counselling (in India, per the NACO protocol), alongside CD4 count and viral load when positive. The tongue lesion will not wipe off; biopsy with EBV in-situ hybridisation confirms hairy leukoplakia if doubt persists. The periodontal screen matters: a red marginal band without plaque adds linear gingival erythema; punched-out interdental necrosis escalates to debridement, metronidazole and chlorhexidine. Management coordinates with the physician: antiretrovirals improve the immune backdrop, fluconazole settles the candidiasis, and dental care proceeds under universal precautions, minding azole-antiretroviral CYP3A4 interactions.
Where students slip
The classification groupings are the exam: candidates place Kaposi sarcoma or hairy leukoplakia in the "less commonly associated" basket — both are strongly associated, and hairy leukoplakia's EBV cause is reliably forgotten (it is not fungal, despite its white colour). Second, the non-blanching rule for KS is missed, and the palate as commonest oral site is swapped for the tongue. Third, linear gingival erythema is treated as ordinary gingivitis — its refractoriness to hygiene and Candida association are the marks. Fourth, hairy leukoplakia is labelled premalignant — it is not; the wipe test separates it from candidiasis at the bedside. Finally, examiners expect universal precautions for all patients as policy, not selective precautions for disclosed serostatus.
Frequently asked questions
Which oral lesions are strongly associated with HIV infection per the EC-Clearinghouse classification?
Candidiasis (erythematous and pseudomembranous), oral hairy leukoplakia, Kaposi sarcoma, linear gingival erythema, necrotising ulcerative gingivitis and periodontitis, and non-Hodgkin lymphoma.
What causes oral hairy leukoplakia and where does it occur?
Epstein-Barr virus-driven epithelial hyperplasia presenting as corrugated, non-removable white striae on the lateral tongue borders — an indicator of declining immunity, not a premalignant lesion.
Which is the commonest oral site of Kaposi sarcoma?
The hard palate, followed by the gingiva — red to purple non-blanching macules, plaques or nodules caused by HHV-8, and an AIDS-defining illness.
What is linear gingival erythema?
A distinct red band along the free gingival margin that does not respond to plaque control alone, is associated with Candida, and belongs to the HIV-related periodontal spectrum.
Which HIV-related oral lesions indicate the need for immediate HIV testing?
Unexplained oral candidiasis, hairy leukoplakia, Kaposi sarcoma, necrotising periodontitis or major atypical aphthae in any adult — oral lesions are frequently the first presentation of HIV infection.