Premalignant Disorders
Actinic Cheilitis
aka Solar Cheilitis · Actinic Cheilosis
Chronic UV-induced degeneration of the vermilion of the lower lip; a potentially malignant disorder that may progress to lip SCC.
§ figuresFigures (1)
Fig. 1Picture of Actinic Cheilitis. This is also known as sailor's lip or farmer's lip.
“Actinic Cheilitis Photo” · Beardfiercely · CC BY-SA 4.0 · Wikimedia Commons
Verified open-access images only, reproduced for education under their stated licences · no AI-generated or illustrative artwork · Actinic Cheilitis figures pending faculty review.
§ overviewOverview
Premalignant degeneration of the lip vermilion caused by cumulative ultraviolet radiation exposure.
§ icdICD Classification
L57.0
§ etiologyEtiology
- 01Chronic UV-B exposure
- 02Fair skin (Fitzpatrick I–II)
- 03Outdoor occupation
- 04Tobacco cofactor
§ riskRisk Factors
- 01Age >40
- 02Male
- 03Outdoor work (farmer, sailor, fisherman)
- 04Lack of lip photoprotection
- 05Immunosuppression
§ epidemiologyEpidemiology
Common in tropical and rural populations; M:F ≈ 10:1; >90% involve the lower lip.
§ pathogenesisPathogenesis
UV-B induces TP53 mutations and epithelial dysplasia in lip keratinocytes with solar elastosis of the underlying connective tissue.
§ clinicalClinical Features
- 01Dry, scaly, atrophic lower lip
- 02Loss of vermilion border definition
- 03Pale/white patches with red erosions
- 04Persistent crusting/fissuring
- 05Focal ulcer or induration = suspect SCC
§ differentialDifferential Diagnosis
- 01Cheilitis (contact/exfoliative)
- 02Lupus erythematosus
- 03Lip SCC
- 04Leukoplakia of lip
§ histopathHistopathology
- 01Epithelial atrophy or hyperkeratosis
- 02Variable dysplasia
- 03Basophilic degeneration of collagen (solar elastosis)
- 04Perivascular chronic inflammation
§ investigationsInvestigations
- 01Incisional biopsy of indurated/ulcerated area
- 02Dermoscopy of lip
- 03Toluidine-blue staining as adjunct
§ treatmentTreatment
- 01Photoprotection: SPF 30+ lip balm, wide-brim hat
- 02Topical 5-FU, imiquimod, or diclofenac for field change
- 03Cryotherapy for focal lesions
- 04CO₂ laser vaporisation or vermilionectomy (lip shave) for severe/dysplastic disease
§ complicationsComplications
- 01Progression to lip SCC (up to 10–20%)
- 02Cosmetic deformity after vermilionectomy
§ prognosisPrognosis
Excellent with photoprotection; malignant transformation risk mandates biopsy of any indurated or non-healing area.
§ examKey Examination Points
- 01Loss of vermilion demarcation
- 02Palpate for induration
- 03Photograph and map lesion
§ revisionQuick Revision Summary
- 01UV-induced PMD of lower lip
- 02Solar elastosis on histology
- 03Vermilionectomy for high-grade dysplasia
§ vivaBDS Viva Questions
- 01How does actinic cheilitis differ from cheilitis?
- 02What are the indications for vermilionectomy?
- 03Rate of malignant transformation?
§ mcqsMCQs — Assessment (3)
Question 1
Most common site of actinic cheilitis:
Question 2
Definitive treatment for widespread dysplastic actinic cheilitis:
Question 3
Hallmark histological feature:
§ evidenceReferences & Evidence
Current Classification
WHO Classification of Tumours Online — Head and Neck
IARC / WHO · 2022
Continuously updated online edition of the WHO head and neck tumour classification.
Evidence summary
Highest level of evidence linked to this page: WHO / Official Classification.
- L1 · Classification — 1
- L2 · Guideline — 1
- L6 · Textbook — 3
1 linked source was published from 2024 onwards. Where guidance is limited or contested, rely on the higher-level sources above rather than this summary. Educational use only — not a substitute for clinical judgement.
Content last reviewed
September 2026
Evidence last reviewed
September 2026
Next scheduled review
September 2027
Review status
EVIDENCE REVIEWED
Search latest PubMed evidence
Last literature search: 7 September 2026
Current Classification
IARC / WHO. IARC · 2022
Continuously updated online edition of the WHO head and neck tumour classification.
Clinical Guidelines
Warnakulasuriya S, Kujan O, Aguirre-Urizar JM et al.. Oral diseases · 2021 · 27(8):1862-1880
WHO collaborating centre consensus on nomenclature and classification of oral potentially malignant disorders.
Histopathology References
Barnes L. CRC Press · 2008
Detailed histopathological reference for head and neck diagnostic criteria.
Textbook References
Neville BW, Damm DD, Allen CM et al.. Elsevier · 2024
Standard reference textbook of oral and maxillofacial pathology used throughout this atlas.
Rajendran R, Sivapathasundharam B. Elsevier · 2020
Undergraduate and postgraduate oral pathology textbook widely used in BDS and FCPS curricula.
Additional sources cited on this page
- Neville BW. Oral & Maxillofacial Pathology, 4e
- Warnakulasuriya S. Oral Oncol 2020
Draft — pending faculty review. Educational use only; verify against current guidelines and primary sources before clinical application.