Tumor growth is slow but its clinical course is relentless and progressive.ACC is the propensity for perineural invasion and distant spread to the lungs and bones is frequent.

• 其特徵为肿瘤通常很小且生长缓慢，在发生初期不易于临床上与影像上侦测到，但却有沿著神经扩散及远端转移的倾向。