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Clinicopathological factors associated with death from thin (<= 1 center dot 00 mm) melanoma

Artikel i vetenskaplig tidskrift
Författare Magdalena Claeson
P. Baade
S. Brown
H. P. Soyer
B. M. Smithers
A. C. Green
D. C. Whiteman
K. Khosrotehrani
Publicerad i British Journal of Dermatology
Sidor 5
ISSN 0007-0963
Publiceringsår 2019
Publicerad vid Institutionen för kliniska vetenskaper, Avdelningen för dermatologi och venereologi
Sidor 5
Språk en
Länkar dx.doi.org/10.1111/bjd.18560
Ämnesord scalp location, queensland, prognosis, survival, registry, cancer, risk, thickness, mortality, trends, Dermatology
Ämneskategorier Dermatologi och venereologi


Background Thin cutaneous melanomas (<= 1 center dot 00 mm) are increasing worldwide, causing around a quarter of all melanoma deaths in the U.S.A. and Australia. Identification of predictive factors for potentially fatal thin melanomas could allow better use of resources for follow-up. Objectives To identify the clinicopathological factors associated with fatal thin melanomas. Methods This large, nested case-case study extracted data from the population-based Queensland Cancer Registry, Australia. Our cohort consisted of Queensland residents aged 0-89 years who were diagnosed with a single, locally invasive thin melanoma (<= 1 center dot 00 mm) between 1995 and 2014. Fatal cases (eligible patients who died from melanoma) were individually matched to three nonfatal cases (eligible patients who were not known to have died from melanoma) according to sex, age, year of diagnosis and follow-up interval. Using conditional logistic regression, we calculated odds ratios (ORs) for melanoma-specific death, adjusting for all collected clinicopathological variables. Results In the cohort, 27 660 eligible patients were diagnosed with a single, thin melanoma. The final case-case series included 424 fatal cases and 1189 nonfatal cases. Fatal cases were sixfold as likely to arise on the scalp as on the back [OR 6 center dot 39, 95% confidence interval (CI) 2 center dot 57-15 center dot 92] and six times as likely to be of thickness 0 center dot 80-1 center dot 00 mm as of < 0 center dot 30 mm (OR 6 center dot 00, 95% CI 3 center dot 55-10 center dot 17). Conclusions Scalp location is a strong prognostic factor of death from thin melanoma. Further, this study provides support that melanomas with a thickness of 0 center dot 80-1 center dot 00 mm are the more hazardous thin lesions. Patients with these tumour characteristics require specific attention during follow-up. What's already known about this topic? Thin invasive melanomas (<= 1 center dot 00 mm) contribute a substantial proportion of melanoma fatalities, owing to the high volume of disease. There is a need to find prognostic factors that will better identify fatal thin melanomas at the time of diagnosis. What does this study add? In this large population-based study, fatal thin tumours were sixfold as likely to be located on the scalp as on the back. Thin melanomas of 0 center dot 80-1 center dot 00 mm thickness were six times as likely to be associated with death as tumours < 0 center dot 30 mm. Scalp location and increasing thickness are strong predictive factors of fatal thin melanomas, indicating that patients with these tumour characteristics require close follow-up.

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