Regression in melanoma is a frequent biological event of uncertain prognostic value as the lesion exhibits heterogeneous phenotypical features, both at the morphological and immunohistochemical level. In the present study, we examined the expression of tissue inhibitors of metalloproteinases (TIMP1, TIMP2 and TIMP3) in melanoma with regression. We specifically examined the expression levels of these TIMPs in regressed components (RC) and non-regressed components (NRC) of the tumor and compared their expression levels with those in non-regressed melanomas. We found that TIMP1 was overexpressed in the NRC of melanomas with partial regression (PR) compared with the NRC in melanomas with segmental regression (SR) (P=0.011). TIMP2 was overexpressed in the NRC of melanomas with PR compared with the NRC in melanomas with SR (PR/SR, P=0.009); or compared with the NRC in melanomas with simultaneous SR-PR (P=0.002); or compared with melanomas without regression (absence of regression) (P=0.037). Moreover, TIMP3 was overexpressed in the NRC of all melanomas with SR as compared to the RC component (P=0.007). Our findings on the differential expression of TIMP1, TIMP2 and TIMP3 in melanomas with regression support the hypothesis that the morphological differences identified in the melanoma regression spectrum may have a correlation with prognosis. This may explain the controversial findings within the literature concerning the biological and prognostic role of regression in melanoma.

Background. With a long tradition and outstanding contributions over time, medical scientific research in Romania has experienced major changes in the last two decades, marked by an increase in scientific publications, originating especially from university centers and fostered by national regulations on publication standards required for professional promotion. This study is aimed at assessing the literature on surgical oncology in Romania, published by Romanian authors in journals indexed in international databases. Materials and Methods. A literature search was performed, focused on surgical oncology performed in Romania. Two databases, PubMed and Web of Science (WoS), were finally selected and included in the study, which included bibliometric parameters and subject analysis. Results. The PubMed search retrieved 464,295 articles being published in only 3 Romanian journals, Chirurgia, The Medical-Surgical Journal (Iasi), and Romanian Journal of Morphology and Embryology. The search of the Web of Science retrieved 494 records on the subject of surgical oncology in Romania, 449 of which were published after 1989. The 494 articles received 2,102 citations, 4.26 per year, and an overall Hirsch index of 21. Most articles were published in the same 3 Romanian journals as in PubMed. Neoplasms of the digestive system prevailed, followed by articles on general surgical oncology issues, cancer research, and therapy. Bucharest has the highest number of authors, followed by Cluj-Napoca and Iasi. Conclusion. Research originating from Romania in the field of surgical oncology is present and visible at an international level mainly through Romanian journals. Sustained effort is required from surgical oncology authors to be published in international journals on this subject, as it is the only way to increase global visibility and impact.

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some machine learning algorithms for sex identification based on linear mandibular measurements derived from CT scans .