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Cutaneous Squamous Cell Carcinoma (cSCC) is a malignant keratinocyte tumour that develops through the suprabasal epidermis. This malignant tumour is the second most common skin malignancy after Basal Cell Carcinoma (BCC). The increased incidence of cSCC is directly proportional to increasing age. Generally, the predisposing factor of cSCC is exposure to recurrent sunlight for a long time, so localisation of cSCC is a part of the body that often exposed to direct sunlight, such as the forehead, face, ears, scalp, neck, and back of the hand. The carcinogenesis process of cSCC is a cumulation of a series of events, one of which plays an important role is the proliferation index assessed by Ki-67. Forty-eight tissue paraffin blocks were diagnosed histopathologically as cutaneous squamous cell carcinoma from the Anatomical Pathology Laboratory of the Faculty of Medicine, Universitas Sumatera Utara and the Anatomical Pathology Unit of Haji Adam Malik General Hospital Medan, as the research sample. The results of protein expression from Ki-67 were assessed based on area. There was no significant correlation between cSCC grading and Ki-67 expression (p &gt; 0.05). Ki-67 antigen tumour marker, widely used to determine the level of tumour cell proliferation.

Correlation of Ki-67 Expression as Tumor cell Proliferation Activity Marker with Cutaneous Squamous Cell Carcinoma Grading