Table 2 Classification criteria (staging) for EAC squamous cell carcinoma
From: External and middle ear diseases: radiological diagnosis based on clinical signs and symptoms
T1 | Tumour limited to EAC without bone erosion and soft tissue involvement |
T2 | Tumour with limited EAC osseous erosion or soft tissue involvement |
T3 | Tumour eroding osseous EAC with limited soft tissue/middle ear/mastoid involvement |
T4 | Tumour eroding deeper inner ear structures/temporomandibular joint/deep soft tissue extension/facial nerve paresis/distant metastases |