Objective: The incidence of skin cancer increases day by day depending on environmental factors. Developing diagnostic and pathological methods provide correct typing of skin cancers. Methods: This retrospective analysis included patients who presented to and were scheduled for treatment at Sivas Cumhuriyet University Plastic Reconstructive and Aesthetic Surgery Clinic between January 1, 2000 and December 31, 2019 due to skin cancer and carcinoma in situ. The results were divided two groups as

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... irst ten years and second ten years. The groups were compared among themself in terms of cancer type, age, gender and localization. Results: 619 cases of 652 skin cancer and in situ carcinoma results were detected. When the groups were compared in terms of tumor types detected, there was a significant increase in MM, Bowen's disease, and rare NMSC subtypes other than SCC and BCC in the second decade (p<0.001). Comparison of NMSC and MSC rates between the groups showed that the incidence of MSC had increased significantly from 5.2% to 10% in the past 10 years (p<0,05). Conclusions: Rare Non-melanocytic skin cancer group includes many types of carcinoma, there are various treatment protocols. Furthermore, many members of this group are known to be more aggressive than Basal cell carcinoma and squamous cell carcinoma. There are no consensus especially for approaches targeting lymph nodes. Closely following is necessary for early detection of recurrences and metastases.