Fig 7. Comparison of the signal intensity of 13 histologically confirmed brain lesions on diffusion-weighted images. All 4 well differentiated adenocarcinomas (Well diff. AC) were graded as –2 or –1, and 2 poorly differentiated adenocarcinomas (Poorly diff. AC) as +1. One small-cell carcinoma (Small cell ca.) and 1 large-cell neuroendocrine carcinoma (LCNC) were both graded as +2. The other lesions were graded as 0 or +1. The signal intensity was graded on 5-point scale as described in Fig 1. Large cell ca., large cell carcinoma; SCC, squamous cell carcinoma; Papillotubular ca., papillotubular indicates carcinoma; Mucoepidermoid ca., mucoepidermoid carcinoma.