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Table 1 Clinicopathologic features

From: Elevated expression of MMP-13 and TIMP-1 in head and neck squamous cell carcinomas may reflect increased tumor invasiveness

Characteristic Number of cases
Age  
   < 60 years 27
   > 60 years 51
Sex  
   Male 54
   Female 24
Tumor site  
   Larynx 26
   Tongue 8
   Skin and mucosa 44
Histologic grade  
   Differentiated (G1) 39
   Poorly differentiated (G2, G3) 39
Mode of tumor invasion  
   Well defined (1 + 2) 18
   No distinct border (3) 43
   Diffuse invasion (4a + 4b) 17