Table 4 Glasscock-Jackson classification of GTP
From: External and middle ear diseases: radiological diagnosis based on clinical signs and symptoms
Type | Description |
Type I | Small mass limited to cochlear promontory |
Type II | Tumour completely filling middle ear space |
Type III | Tumour filling middle ear and extending into mastoid air cells |
Type IV | Tumour filling middle ear, extending into mastoid air cells or through |
Tympanic membrane to fill external auditory canal; may extend anteriorly to the carotid artery |