AtlasPigmentedSmoker's Melanosis

Pigmented Lesions

Smoker's Melanosis

aka Tobacco-Associated Pigmentation · Smoking-Related Melanosis

Diffuse brown mucosal pigmentation, particularly on anterior labial gingiva, caused by tobacco smoking.

Cause
Tobacco smoking
Site
Anterior labial gingiva
Reversible
Yes, with cessation

§ figuresFigures (3)

Fig. 1Smoker's melanosis in oral mucosa with brown black pigmentation

“Smoker's melanosis” · Skinstudy · CC BY-SA 3.0 · Wikimedia Commons

Fig. 2Smoker´s melanosis a brown to black pigmentation consisting of melanin granules in the lower part of the gums epithelium. Caused by cigarette smoking.

“Smoker´s melanosis” · SK10DPB · CC BY-SA 3.0 · Wikimedia Commons

Fig. 3Smoker's melanosis in a patient consuming 2 packs of cigarette per day.

“Smoker milanosis” · Shaimaa Abdellatif · 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 · Smoker's Melanosis figures pending faculty review.

§ overviewOverview

Benign melanin hyperpigmentation of oral mucosa induced by tobacco smoke components.

§ icdICD Classification

L81.4

§ etiologyEtiology

  • 01Tobacco smoke components stimulate melanin production

§ epidemiologyEpidemiology

Common in smokers; F > M (especially with OCP use). Anterior gingiva most common.

§ pathogenesisPathogenesis

Nicotine and benzopyrenes stimulate melanocyte activity → increased melanin deposition.

§ clinicalClinical Features

  • 01Diffuse brown pigmentation
  • 02Anterior labial gingiva, lips, buccal mucosa
  • 03Intensity correlates with smoking duration
  • 04Usually bilateral

§ differentialDifferential Diagnosis

  • 01Physiological pigmentation
  • 02Drug-induced pigmentation
  • 03Addison disease
  • 04Melanoma

§ histopathHistopathology

  • 01Increased melanin in basal layer
  • 02Melanophages in lamina propria
  • 03No melanocyte proliferation or atypia

§ investigationsInvestigations

  • 01Clinical + smoking history
  • 02Biopsy if atypical

§ treatmentTreatment

  • 01Smoking cessation (pigmentation fades over months to years)

§ prognosisPrognosis

Excellent; reversible with cessation.

§ examKey Examination Points

  • 01Anterior labial gingiva
  • 02Reversible with smoking cessation
  • 03Distinguish from melanoma by diffuse pattern

§ revisionQuick Revision Summary

  • 01Tobacco-induced melanin
  • 02Anterior gingiva
  • 03Fades with cessation

§ vivaBDS Viva Questions

  • 01What causes smoker's melanosis?
  • 02Is it reversible?
  • 03How do you differentiate from melanoma?

§ mcqsMCQs — Assessment (3)

Question 1

Smoker's melanosis most commonly affects:

Question 2

Smoker's melanosis is:

Question 3

Histology shows:

§ 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.

View official source

Evidence summary

Highest level of evidence linked to this page: WHO / Official Classification.

  • L1 · Classification — 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

Open PubMed

Current Classification

Reference #1L1 · ClassificationWHO / Classification Verified
WHO Classification of Tumours Online — Head and Neck

IARC / WHO. IARC · 2022

Continuously updated online edition of the WHO head and neck tumour classification.

DOI: Identifier not availablePMID: Identifier not available
View source

Histopathology References

Reference #4L6 · TextbookHistopathology References Unverified
Surgical Pathology of the Head and Neck3rd Edition

Barnes L. CRC Press · 2008

Detailed histopathological reference for head and neck diagnostic criteria.

DOI: Identifier not availablePMID: Identifier not available

Textbook References

Reference #2L6 · TextbookTextbooksRecent Verified
Oral and Maxillofacial Pathology5th Edition

Neville BW, Damm DD, Allen CM et al.. Elsevier · 2024

Standard reference textbook of oral and maxillofacial pathology used throughout this atlas.

DOI: Identifier not availablePMID: Identifier not available
View source
Reference #3L6 · TextbookTextbooks Unverified
Shafer's Textbook of Oral Pathology9th Edition

Rajendran R, Sivapathasundharam B. Elsevier · 2020

Undergraduate and postgraduate oral pathology textbook widely used in BDS and FCPS curricula.

DOI: Identifier not availablePMID: Identifier not available

Additional sources cited on this page

  1. Neville BW. Oral & Maxillofacial Pathology, 4e

Browse the full evidence library →

Draft — pending faculty review. Educational use only; verify against current guidelines and primary sources before clinical application.