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Squamous Cell Carcinoma and Its Variants.

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Squamous cell carcinoma (SCC) of the anterior skull base is challenging to manage. Surgical management offers a 5-year survival rate of 65-71%, with margin status and tumor invasion predicting outcomes.

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Area of Science:

  • Oncology
  • Neurosurgery
  • Head and Neck Surgery

Background:

  • Squamous cell carcinoma (SCC) frequently affects the anterior skull base, often originating from the nasal cavity, paranasal sinuses, skin, or orbit.
  • Management is complex due to the tumor's proximity to critical structures at the intracranial-extracranial interface.
  • Limited data exist for SCC specifically, as many studies group it with other histologies.

Purpose of the Study:

  • To analyze treatment outcomes for anterior skull base SCC.
  • To identify prognostic factors influencing survival in these patients.

Main Methods:

  • Retrospective analysis of an institutional database.
  • Inclusion of patients who underwent surgery for anterior skull base SCC.
  • Evaluation of surgical margin status, dural invasion, and pterygopalatine fossa involvement as prognostic indicators.

Main Results:

  • The 5-year disease-specific survival was 65% for sinonasal SCC and 71% for cutaneous SCC.
  • Positive surgical margins, dural involvement, and pterygopalatine fossa invasion were associated with a poor prognosis.

Conclusions:

  • Multimodality treatment, often starting with surgery, is crucial for anterior skull base SCC.
  • Surgical outcomes are influenced by tumor characteristics and extent of invasion, highlighting the importance of achieving clear margins.