Red Lesions
Geographic Tongue
aka Benign migratory glossitis · Erythema migrans · Wandering rash of the tongue
A common, benign, chronic inflammatory condition of the tongue characterised by migrating, well-demarcated red patches with raised white serpiginous borders, producing a map-like appearance.
Red Flags
- ·Fixed (non-migratory) lesion — reconsider diagnosis
- ·Induration, ulceration, cervical lymphadenopathy
- ·Failure to respond to reassurance and steroids
Clinical Tips
- ·Photograph the tongue — migration between visits confirms the diagnosis.
- ·Reassurance is the most important intervention.
- ·Ectopic geographic stomatitis can involve any oral mucosa — be aware.
Examination Checklist
- ·Full oral exam
- ·Photograph for baseline (documents migration)
- ·Ask about psoriasis, atopy, family history
§ overviewOverview
A benign inflammatory disorder of unknown aetiology presenting as circular or irregular areas of filiform papillae atrophy with raised keratotic borders that migrate over time on the dorsum and lateral tongue.
§ icdICD Classification
ICD-10 K14.1
§ etiologyEtiology
- 01Idiopathic; possible associations with psoriasis, atopy, stress, hormonal factors, nutritional deficiencies, and juvenile diabetes
§ riskRisk Factors
- 01Family history (positive in 30%)
- 02Personal/family history of psoriasis or atopy
- 03Stress and hormonal changes
- 04Fissured tongue (co-existence common)
§ geneticsGenetics & Molecular Biology
- 01Associations with HLA-B15, HLA-Cw6 (also linked with psoriasis)
§ epidemiologyEpidemiology
Prevalence 1–2.5% in general population; F > M; can occur at any age but often first noted in young adults.
§ pathogenesisPathogenesis
Rapid maturation and shedding of filiform papillae in circumscribed areas of dorsal tongue epithelium, mediated by neutrophilic microabscesses similar to psoriasis, producing red patches with peripheral keratotic borders that shift over days to weeks.
§ clinicalClinical Features
- 01Multiple, well-demarcated, smooth red patches on dorsum and lateral tongue
- 02Raised, yellow-white, serpiginous or arcuate keratotic borders
- 03Lesions migrate — change in shape and location over days to weeks
- 04Usually asymptomatic; some report burning with hot/spicy/acidic foods
- 05Often coexists with fissured tongue
- 06Rare extra-lingual sites (ectopic geographic stomatitis): buccal mucosa, palate, gingiva
§ signsSigns & Symptoms
- 01Asymptomatic in most
- 02Burning sensation with spicy/acidic foods
- 03Occasional metallic taste
§ differentialDifferential Diagnosis
- 01Erythematous candidiasis
- 02Median rhomboid glossitis
- 03Contact stomatitis
- 04Lichen planus (atrophic)
- 05Nutritional glossitis (iron, B12, folate)
- 06Reiter's syndrome (oral lesions)
- 07Psoriasis (oral)
- 08Erythroplakia
§ criteriaDiagnostic Criteria
- 01Clinical — migrating red patches with raised white borders on the tongue. Biopsy rarely required.
§ histopathHistopathology
- 01Loss of filiform papillae in red patches
- 02Neutrophilic microabscesses (Munro's abscesses) in parakeratotic layer at borders — psoriasiform pattern
- 03Elongated rete ridges with mild acanthosis
- 04Chronic inflammatory infiltrate in lamina propria
§ investigationsInvestigations
- 01Clinical diagnosis is sufficient
- 02Screen haematinics if burning symptoms
- 03Biopsy only if atypical or fixed lesion
§ ihcIHC / Special Stains
- 01Not required
§ classificationClassification
- 01Typical (multiple migrating patches)
- 02Atypical / ectopic (extra-lingual mucosa involvement)
§ planTreatment Planning
- 01Reassure — benign, no malignant potential
- 02Symptomatic treatment for burning
§ treatmentTreatment
- 01Reassurance — no treatment required in asymptomatic cases
- 02Avoid triggers: hot, spicy, acidic foods; alcohol-containing mouthwashes
- 03Topical anaesthetic (2% lidocaine viscous) for symptomatic relief
- 04Topical corticosteroid (triamcinolone in orabase) for symptomatic lesions
- 05Zinc supplementation — some reports of benefit
- 06Address any co-existent nutritional deficiency
§ medicalMedical Management
- 01Topical steroids for symptomatic disease
- 02Antihistamines if allergic co-factor
- 03Zinc supplementation (empirical)
§ surgicalSurgical Management
- 01Not indicated
§ complicationsComplications
- 01None significant; anxiety from cosmetic appearance
§ recurrenceRecurrence Rate
Chronic and recurrent by nature; may resolve spontaneously and recur.
§ followupFollow-up Protocol
- 01No specific follow-up; reassurance
§ prognosisPrognosis
Excellent — benign, no malignant potential.
§ preventionPrevention
- 01Avoid identified dietary triggers
§ examKey Examination Points
- 01Migrating pattern
- 02White raised borders
- 03Co-existent fissured tongue
- 04Extra-lingual involvement
§ revisionQuick Revision Summary
- 01Migrating red patches + white borders
- 02Psoriasiform histology
- 03Benign, no treatment
- 04Associated with fissured tongue
§ vivaBDS Viva Questions
- 01Define geographic tongue.
- 02What is the histological hallmark?
- 03Association with psoriasis?
- 04How do you reassure a patient?
- 05Name differentials.
- 06Is it premalignant?
§ bdsBDS Professional Examination
- 01Short note: Geographic tongue.
- 02Describe benign migratory glossitis — features, diagnosis and management.
§ fcpsFCPS Residency Questions
- 01Discuss the differential diagnosis of red patches on the tongue with emphasis on geographic tongue.
§ pearlsClinical Pearls
- 01Migration is diagnostic — ask patient to photograph over 1–2 weeks.
- 02Reassurance is the treatment; no biopsy needed if classical.
- 03Screen for haematinics if burning persists.
§ mnemonicsMnemonics
- 01GEO = Grows, Erases, Reappears Over time
§ readingSuggested Reading
- 01Assimakopoulos D et al. Benign migratory glossitis. Am J Med 2002.
- 02Miloglu O et al. Prevalence of geographic tongue. Turkish J Med Sci 2009.
§ differentialDifferential Comparison
| Entity | Feature | Distinguisher |
|---|---|---|
| Erythematous candidiasis | Red patch on tongue | KOH positive; static distribution; responds to antifungals |
| Nutritional glossitis | Smooth red tongue | Uniformly bald; low haematinics |
| Reiter's oral lesion | Geographic-like lesion | Arthritis, conjunctivitis, urethritis triad |
§ mcqsMCQs — Assessment (5)
Question 1
Histological hallmark of geographic tongue is:
Question 2
Geographic tongue is associated with:
Question 3
Malignant potential is:
Question 4
Best confirmation of diagnosis is:
Question 5
Recommended treatment for asymptomatic geographic tongue:
References
- Neville BW. Oral & Maxillofacial Pathology, 4e
- Regezi JA. Oral Pathology, 7e
Draft — pending faculty review. Educational use only; verify against current guidelines and primary sources before clinical application.