[Classification of cutaneous squamous cell carcinoma : How do I recognise my high-risk patient?].

Cutaneous squamous cell carcinomas are the second most common malignant tumours of the skin. In most cases, they are primarily treatable by surgery. Various risk factors for local recurrence as well as metastasis and tumor-specific death have been described. Various classification systems are available for risk stratification. Tumour thickness is the strongest risk factor for the development of local recurrences, but also for metastasis and tumour-specific death. In addition, the immune status of patients, location and histological factors such as growth patterns and differentiation play an important role in the assessment of the individual risk. According to these parameters, patients should be included in a risk-adapted follow-up regimen. The risk of local recurrence and metastasis is highest in the first few years after excision, which is why follow-up care should be more intensive during this time.