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Dermatology · Skin tumours

Melanocytic lesions

Melanocytic lesions include moles (naevi) and, more rarely, melanoma. Very common, they are one of the main reasons for seeing a dermatologist: a routine check, a cosmetic concern or worry about a recent change. Clinical and dermoscopic examination distinguishes benign lesions from those that need monitoring or excision. The aim is to reassure the patient or to ensure early treatment where necessary.

Written by Dr A. Turcarelli, dermatologist and allergist Updated 5 January 2026 6 min read

Lésions mélanocytaires

Introduction

Benign skin tumours are common skin lesions that are not cancerous. They account for a very large share of dermatology consultations, often for a diagnostic opinion, cosmetic concerns or worry about a recent change. The main challenge is to distinguish them with certainty from malignant lesions, in order to reassure the patient or arrange appropriate treatment if necessary.

Symptoms

  • Pigmented or non-pigmented lesions
  • Raised or flat (flat, dome-shaped, on a stalk)
  • Variable colour: skin-coloured, brown, black, red
  • Stable size or slow growth
  • Usually painless
  • No spontaneous bleeding (except after injury)
  • Possible cosmetic or mechanical discomfort (rubbing)

Causes

Genetic factors (naevi, skin tags)
Skin ageing
Chronic sun exposure
Hormonal factors
Benign proliferation of
melanocytes keratinocytes vascular cells fatty tissue
melanocytes
keratinocytes
vascular cells
fatty tissue

Diagnosis

  1. Dermatological clinical examination
  2. Dermoscopy to analyse the structure of the lesion
  3. Comparison with the criteria for benign lesions
  4. Follow-up photographs if necessary
  5. Biopsy or diagnostic excision if in doubt

Treatments

Cosmetic concerns
Functional discomfort (rubbing, irritation)
Repeated bleeding
Diagnostic doubt
At the patient’s request, after being informed
Simple monitoring
Local surgical excision
Electrocoagulation
Dermatological laser, depending on the indication
Cryotherapy for certain lesions
not always necessary

Management

Specialist dermatology consultation

An accurate, clearly explained diagnosis

Shared decision between monitoring and treatment

Procedures carried out under safe medical conditions

Follow-up if necessary

Frequently asked questions

See us about melanocytic lesions

Consultation with a confirmed diagnosis and a written treatment plan.

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