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Features associated with melanoma metastasis in Latvia

  • Authors:
    • Dace Pjanova
    • Dace Ruklisa
    • Elza Kregere
    • Kristine Azarjana
    • Aija Ozola
    • Ingrida Cema

  • View Affiliations

  • Published online on: August 12, 2020     https://doi.org/10.3892/ol.2020.11978
  • Article Number: 117

  • Copyright: © Pjanova et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Cutaneous melanoma (CM) is the most aggressive form of skin cancer, exhibits an increasing incidence worldwide and has a high potential to develop metastasis. The current study aimed to identify a set of parameters that may aid in predicting the probability and timing of the onset of CM metastasis. A retrospective analysis was performed using the archive data of 2,026 patients with CM that were treated at the Riga East University Hospital Latvian Oncology Centre, which is the largest oncological hospital in the country, between 1998 and 2015. A case‑control study design was employed, where patients with metastasis (n=278) were used as the cases and patients without metastasis were used as the controls. The present study examined the associations between metastasis and potential risk factors and constructed multivariate models of features that predicted metastasis using stepwise regression. Time until metastasis was analyzed using negative binomial regression models. The results of the present study indicated an increase in the number of melanomas that developed metastases during 1998‑2015. Tumor Breslow thickness was demonstrated to be significantly larger in patients with metastasis compared with those without (P=0.012). The presence of ulceration significantly increased the risk of metastases [odds ratio (OR), 1.66; 95% CI, 1.07‑2.59; P=0.033]. The absence of pigment in melanoma tissues was indicated to lead to a greater likelihood of metastasis (OR, 2.14; 95% CI, 1.10‑4.19; P=0.035). Shorter times from diagnosis until the onset of metastases were observed in older patients (incident rate ratio (IRR), 6.85; 95% CI, 2.43‑19.30; P=2.78x10‑4), and a borderline significant association was observed in those with ulcerated tumors (IRR, 1.33; 95% CI, 0.98‑1.80; P=0.064). Therefore, the main features associated with the development of melanoma metastasis in Latvia were indicated to be tumor ulceration, absence of pigment and Breslow thickness.
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October-2020
Volume 20 Issue 4

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Pjanova D, Ruklisa D, Kregere E, Azarjana K, Ozola A and Cema I: Features associated with melanoma metastasis in Latvia. Oncol Lett 20: 117, 2020.
APA
Pjanova, D., Ruklisa, D., Kregere, E., Azarjana, K., Ozola, A., & Cema, I. (2020). Features associated with melanoma metastasis in Latvia. Oncology Letters, 20, 117. https://doi.org/10.3892/ol.2020.11978
MLA
Pjanova, D., Ruklisa, D., Kregere, E., Azarjana, K., Ozola, A., Cema, I."Features associated with melanoma metastasis in Latvia". Oncology Letters 20.4 (2020): 117.
Chicago
Pjanova, D., Ruklisa, D., Kregere, E., Azarjana, K., Ozola, A., Cema, I."Features associated with melanoma metastasis in Latvia". Oncology Letters 20, no. 4 (2020): 117. https://doi.org/10.3892/ol.2020.11978