4.6 Review

Recent Advances in the Diagnosis and Management of High-Risk Cutaneous Squamous Cell Carcinoma

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CANCERS
卷 14, 期 14, 页码 -

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MDPI
DOI: 10.3390/cancers14143556

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high-risk; cutaneous squamous cell carcinoma; diagnosis; recurrence; metastasis; adjuvant; treatment

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This review discusses the characteristics and management of high-risk cutaneous squamous cell carcinoma (cSCC). Factors to consider regarding the follow-up schedule for patients diagnosed with high-risk cSCC include the risk and possible time of occurrence of metastasis.
Simple Summary Cutaneous squamous cell carcinoma (cSCC) is the second most common skin cancer. Although most cSCCs are effectively treated with surgery, there are some tumors at higher risk for relapse, progression to nodal metastasis, or, rarely, death. An important issue concerns the early diagnosis and appropriate treatment of these few high-risk cSCCs, as they are associated with poorer prognosis and may more frequently progress to advanced cSCCs. This review discusses the characteristics of high-risk cSCC and how to identify and manage patients with these tumors. High-risk cSCC is defined as invasive cSCC staged as N0 (without detectable regional lymph nodes) and M0 (without distant metastasis), that has features associated with a higher risk of poorer prognosis. The focus of this review is on the recent advances in the diagnosis and management of high-risk cSCC. The interest in high-risk cSCC relies on its higher risk of progression to advanced cSCC, as it represents the main pool of cSCCs that give rise to advanced tumors. Assessment of the risk is thus particularly relevant for common cSCC to identify the few with a high-risk risk of local recurrence, metastasis, or disease-specific death among all other low-risk tumors. The timely diagnosis and effective treatment of high-risk cSCCs may halt their further progression and aim to prevent and lower the incidence of advanced cSCCs. Clearance of the tumor with negative surgical margins is the main goal of surgery, which is the primary treatment of cSCC. It seems that it is difficult to discern the group of high-risk cSCCs that may benefit from adjuvant RT, as a universal beneficial effect for a cSCC with any high-risk factor which was resected with clear surgical margins has not been established. In the case of a high-risk cSCC with positive margins after surgery, and re-excision not feasible, post-operative radiotherapy is performed when possible. Recommendations on further management are discussed. Regarding the follow-up of patients diagnosed with high-risk cSCC, factors to consider regarding the frequency and intensity of the follow-up schedule include the risk and possible time of occurrence of metastasis from cSCC.

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