Slow-growing melanoma: A dermoscopy follow-up study

Argenziano, G., Kittler, H., Ferrara, G., Rubegni, P., Malvehy, J., Puig, S., Cowell, L., Stanganelli, I., De Giorgi, V., Thomas, L., Bahadoran, P., Menzies, S. W., Piccolo, D., Marghoob, A. A. and Zalaudek, I. (2010) Slow-growing melanoma: A dermoscopy follow-up study. British Journal of Dermatology, 162 2: 267-273. doi:10.1111/j.1365-2133.2009.09416.x


Author Argenziano, G.
Kittler, H.
Ferrara, G.
Rubegni, P.
Malvehy, J.
Puig, S.
Cowell, L.
Stanganelli, I.
De Giorgi, V.
Thomas, L.
Bahadoran, P.
Menzies, S. W.
Piccolo, D.
Marghoob, A. A.
Zalaudek, I.
Title Slow-growing melanoma: A dermoscopy follow-up study
Journal name British Journal of Dermatology   Check publisher's open access policy
ISSN 0007-0963
1365-2133
0366-077X
Publication date 2010-02
Year available 2009
Sub-type Article (original research)
DOI 10.1111/j.1365-2133.2009.09416.x
Volume 162
Issue 2
Start page 267
End page 273
Total pages 7
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell Publishing
Collection year 2011
Language eng
Formatted abstract
Background  Recent evidence suggests that melanoma is a family of different tumours with varying abilities to grow and metastasize. Trends in melanoma epidemiology show a strong increase in the incidence of thin melanoma, with no corresponding increase in mortality or incidence of thick melanoma. We initially evaluated five cases and found that none had baseline features suggestive of melanoma; excision was performed based on slight changes visible only in side-by-side comparisons of dermoscopic images.

Objectives
  To assess the clinico-dermoscopic features and the growth patterns of melanomas that were excised after a follow-up of 1 year or more due to their inconspicuous features at the baseline consultation.

Methods  In a multicentre, retrospective study of histopathologically confirmed melanomas excised after follow-up, we analysed dermoscopic images obtained at the initial consultation and compared them with images obtained at the last follow-up consultation. Images were analysed and graded using standard algorithms and scored for changes in size, symmetrical or asymmetrical structural change, and development of new melanoma-specific criteria. An overall score reflecting the amount of change was calculated for each lesion.

Results  Our series consisted of 103 melanomas. After a median follow-up of 20 months, most lesions were still in situ or early invasive (median Breslow thickness of 0·48 mm), with only three lesions showing tumour thickness of 1 mm or more. The most frequent baseline characteristics were asymmetrical pigmentation (78·6% of lesions), reticular overall pattern (62·1%), and regression features (35·9%). Most melanomas (58·3%) showed minor to moderate changes over time, with < 2 mm size increase, with asymmetrical structural change, and without development of new melanoma-specific criteria. Major changes were visible only after a mean follow-up of 33 months.

Conclusions  This study provides evidence for the existence of a subgroup of slow-growing melanomas, which may explain the increase in the incidence of thin melanoma, despite stable rates of thick melanoma and melanoma-associated mortality.  © 2009 British Association of Dermatologists.
Keyword Clinical diagnosis
Dermoscopy
Follow-up
Melanoma
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online: 20 JUL 2009

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Medicine Publications
 
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Created: Sun, 31 Jan 2010, 00:05:40 EST