Figure 6.

Pleomorphic adenoma located in the superficial lobe of the right parotid gland of a 50-year-old female. (A) Axial T₁WI sequences showed a mass lesion with hypointense signal and clear margin. (B) The T₂WI fat suppression sequence showed a round mass with high and homogeneous signal. (C) ADC map showed the mass alternated with blue signal. The ADC value was 1.61 × 10⁻³ mm² s^–1. (D-E) Time-signal intensity curve showed a plateau enhancement pattern (Type C), which showed the tumors was malignant. However, the combination of TIC and ADC value showed the tumor was benign. (F) HE staining: original magnification, 200×. ADC, apparent diffusion coefficient; HE, hematoxylin;T₁WI, T₁ weighted imaging; T₂WI, T₂ weighted imaging; TIC, time-intensity curve.