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Evaluation for locoregional and distant metastases in cutaneous squamous cell and basal cell carcinoma

Authors
Allison Vidimos, MD
Todd Stultz, DDS, MD
Section Editor
June K Robinson, MD
Deputy Editor
Rosamaria Corona, MD, DSc

INTRODUCTION

In the majority of patients with cutaneous squamous cell carcinoma (SCC) or basal cell carcinoma (BCC), disease remains limited to the skin and is successfully managed with local therapy, such as excision, lesion destruction, or irradiation of the primary lesion. However, in 1 to 5 percent of patients with cutaneous SCC and in rare individuals with BCC, locoregional or distant metastases occur, resulting in an increased risk for mortality and the need for alternative approaches to therapy. (See "Treatment and prognosis of basal cell carcinoma at low risk of recurrence", section on 'Metastasis' and "Treatment and prognosis of cutaneous squamous cell carcinoma", section on 'Prognosis'.)

The evaluation for regional and distant metastases in patients with cutaneous SCC or BCC will be reviewed here. The clinical features and treatment of SCC and BCC are discussed elsewhere. (See "Clinical features and diagnosis of cutaneous squamous cell carcinoma (SCC)" and "Treatment and prognosis of cutaneous squamous cell carcinoma" and "Epidemiology, pathogenesis, and clinical features of basal cell carcinoma" and "Treatment and prognosis of basal cell carcinoma at low risk of recurrence" and "Treatment of basal cell carcinomas at high risk for recurrence".)

SQUAMOUS CELL CARCINOMA

The identification of patients at increased risk for metastasis and, concordantly, the most appropriate work-up for metastatic disease are important components of the management of patients with cutaneous SCC [1]. However, data on the approach to the evaluation for metastatic disease are limited, contributing to the absence of definitive recommendations on the indications for investigative tests and the selection of appropriate studies.

In general, clinical assessment by physical examination is considered sufficient for the evaluation of most patients with cutaneous SCC; the need for further evaluation with radiologic studies should be considered in patients who exhibit clinical or pathologic features associated with an elevated risk for metastasis (high-risk SCC) (table 1). The impact of sentinel lymph node (SLN) biopsy, which has been used to evaluate lymph node status in select patients with high-risk SCC, remains uncertain. (See 'Patients without palpable lymph nodes' below and 'Evaluation for distant metastases' below and 'Sentinel lymph node biopsy' below.)

Locoregional evaluation — Lymph nodes are the most common sites for metastasis of cutaneous SCC, and, regardless of the presence or absence of high-risk features (table 1), all patients diagnosed with invasive cutaneous SCC should undergo regional lymph node palpation at the time of diagnosis and during post-treatment follow-up. (See "Treatment and prognosis of cutaneous squamous cell carcinoma", section on 'Follow-up'.)

          

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Literature review current through: Nov 2016. | This topic last updated: Tue Nov 01 00:00:00 GMT+00:00 2016.
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