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Health Dictionary

Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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Melanoma biopsy

Introduction

Overview

Overview

All patients with suspected melanoma require biopsy. Findings on biopsy may distinguish the sub-type and the stage of melanoma.

Approach to Patients with Suspected Melanoma

Approach to Patients with Suspected Melanoma

The following algorithm illustrates the approach to patients with suspected melanoma.[1]

 
 
 
 
 
 
 
 
Suspicious pigmented lesion
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Biopsy
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Inadequate
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rebiopsy
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Melanoma confirmed
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Breslow thickness
 
Ulceration status
 
Mitotic rate
 
Depth and peripheral margin status
 
Presence of satellitosis
 
Clark level for lesions ≤ 1 mm
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Reassessment with complete physical examination, including neurological exam and lymph node assessment
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Biopsy

Biopsy

  • Patients who have lesions suspected to be melanoma should always be biopsied.[1]
  • An excisional biopsy (either elliptical, punch, or saucerization) of the thickest portion of the lesion with 1-3 mm margins is recommended.[1]
  • Shave biopsy is acceptable only when the index of suspicion for melanoma is low.[1]
  • The following should be reported when a biopsy is being reported:[1]


To view the histopathologic characteristic features of all subtypes of melanoma, click here.

References

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Coit DG, Andtbacka R, Anker CJ, Bichakjian CK, Carson WE, Daud A; et al. (2013). “Melanoma, version 2.2013: featured updates to the NCCN guidelines”. J Natl Compr Canc Netw. 11 (4): 395–407. PMID 23584343.

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Yazan Daaboul, M.D.; Serge Korjian M.D.