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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 first 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. [ABSTRACT FROM AUTHOR]

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 first 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. [ABSTRACT FROM AUTHOR]

An 8-year-old girl presented with a scalp swelling. The swelling was recurrent, reappearing everytime after local excision. She underwent surgery and the histopathologic diagnosis was malignant hidradenoma. This very rare and aggressive tumor is known to occur in elderly population and is histopathologically distinct from its commonly occuring benign counterpart. Malignant hidradenoma is resistant to chemotherapy and radiotherapy. We empahsize that being cognizant of the possibility of this rare tumor would assist in timely action in the form of wide resection, with possible reduction in morbidity and mortality.

Malignant Nodular Hidradenoma otherwise designated as Hidradenocarcinoma is a malignant sweat gland tumor which mandates attention due to its rarity and its increased potential for local destruction and metastasis. Though it was first reported in 1954, only 70 cases have been documented till date as per review of literature. The tumor possesses distinctive histological and immunohistochemical features with definitive criteria designed for detection of malignancy. This case report describes the occurrence of malignant nodular hidradenoma in a 40 year old male on the dorsum of the left foot.

An 8-year-old girl presented with a scalp swelling. The swelling was recurrent, reappearing everytime after local excision. She underwent surgery and the histopathologic diagnosis was malignant hidradenoma. This very rare and aggressive tumor is known to occur in elderly population and is histopathologically distinct from its commonly occuring benign counterpart. Malignant hidradenoma is resistant to chemotherapy and radiotherapy. We empahsize that being cognizant of the possibility of this rare tumor would assist in timely action in the form of wide resection, with possible reduction in morbidity and mortality. [ABSTRACT FROM AUTHOR]

Malignant nodular hidradenoma (MNH) is a rare tumor of sweat gland known by many names in the literature. Scalp is a known and yet uncommon site of occurrence. We describe two patients with scalp MNH with brain parenchymal invasion. Both tumors recurred in spite of total excision and radiotherapy. [ABSTRACT FROM AUTHOR]