| Glomus Tympanicum | |
|---|---|
| Type 1 | Small mass limited to the promontory |
| Type 2 | Tumour completely filling the middle ear |
| Type 3 | Tumour filling the middle ear and mastoid |
| Type 4 | Tumour completely filling the middle ear, mastoid or through the external auditory canal. May also extend anteriorly to involve the carotid artery |
| Glomus Jugulare | |
|---|---|
| Type 1 | Small tumour involving the jugular bulb, middle ear, and mastoid |
| Type 2 | Tumour extending under the internal auditory canal May or may not have intracranial extension |
| Type 3 | Tumour extending to the petrous apex May or may not have intracranial extension |
| Type 4 | Tumour extending beyond the petrous apex into the clivus or infratemporal fossa May or may not have intracranial extension |
Jackson, C. Gary, Michael E. Glasscock, and Perry F. Harris. “Glomus tumors: diagnosis, classification, and management of large lesions.” Archives of Otolaryngology 108.7 (1982): 401-406. ↩
Oldring, D., and U. Fisch. “Glomus tumors of the temporal region: surgical therapy.” The American Journal of Otology 1.1 (1979): 7-18. ↩
Fisch, Ugo. “Infratemporal fossa approach for glomus tumors of the temporal bone.” Annals of Otology, Rhinology & Laryngology 91.5 (1982): 474-479. ↩
