There is edema/cellulitis surrounding the pinna, periauricular soft tissues, parotid gland or masticator and parapharyngeal spaces on either side.    [Yes/No]

External auditory canal is abnormal.    [Yes/No]

There is middle ear or mastoid mucosal disease/fluid.    [Yes/No]

The external cortex of the mastoid process is eroded.    [Yes/No]

There is a subperiosteal abscess along the outer margin of the mastoid portion of the temporal bone.   [Yes/No]

The mastoid septae are eroded.    [Yes/No]

The sigmoid plate of the mastoid is eroded.    [Yes/No]

There are dural reactive changes or a subperiosteal/epidural abscess along the sigmoid plate of the mastoid displacing the adjacent sigmoid sinus.    [Yes/No]

The roof of the mastoid and middle ear are eroded.    [Yes/No]

There is dural reactive change,subperiosteal, epidural or subdural abscess long the roof of the mastoid or middle ear or the surfaces of the petrous portion of the temporal bone.    [Yes/No]

The ossicles; in particular the incus long process, the incudostapedial joint and stapes are eroded or displaced.   [Yes/No]

The facial canal and nerve are abnormal.   [Yes/No]

The petrous apex is abnormal.   [Yes/No]

The inner ear, in particular the lateral semicircular canal and the cochlea are eroded or otherwise abnormal.    [Yes/No]

External auditory canal is abnormal.    [Yes/No]

There is middle ear or mastoid mucosal disease/fluid.    [Yes/No]

The external cortex of the mastoid process is eroded.    [Yes/No]

There is a subperiosteal abscess along the outer margin of the mastoid portion of the temporal bone.    [Yes/No]

The mastoid septae are eroded.    [Yes/No]

The sigmoid plate of the mastoid is eroded.   [Yes/No]

There are dural reactive changes or a subperiosteal/epidural abscess along the sigmoid plate of the mastoid displacing the adjacent sigmoid sinus.    [Yes/No]

The roof of the mastoid and middle ear are eroded.    [Yes/No]

There is dural reactive change, subperiosteal, epidural or subdural abscess along the roof of the mastoid or middle ear or the surfaces of the petrous portion of the temporal bone.    [Yes/No]

The ossicles; in particular the incus long process, the incudostapedial joint and stapes are eroded or displaced.   [Yes/No]

The facial canal and nerve are abnormal.   [Yes/No]

The petrous apex is abnormal.   [Yes/No]

The inner ear, in particular the lateral semicircular canal and the cochlea are eroded or otherwise abnormal.    [Yes/No]

There is gas in the subarachnoid space or otherwise intracranial.   [Yes/No]

There is evidence of thrombosis, thrombophlebitis or other occlusive or inflammatory process of the sigmoid sinus, transverse sinus, the vein of Labbe’ or jugular bulb.    [Yes/No]

There is evidence of thrombosis, thrombophlebitis or other occlusive or inflammatory process of jugular vein.   [Yes/No]

There is dural reactive change along the floor of the middle cranial fossa or along the inner surfaces of the petrous portion of the temporal bone.    [Yes/No]

There is a subperiosteal, subdural or epidural abscess along the floor of the middle cranial fossa or along the inner surfaces of the petrous portion of the temporal bone.    [Yes/No]

There is likely meningitis involving the inferior temporal lobe or adjacent cerebellum   [Yes/No]

There is likely cerebritis involving the inferior temporal lobe or adjacent cerebellum.   [Yes/No]

There is brain edema and/or evolving abscess present or, specifically, involving the inferior temporal lobe or adjacent cerebellum.   [Yes/No]

There is inflamminflammation of the distal internal carotid arteryation of the distal internal carotid artery.   [Yes/No]

There is obstructive hydrocephalus - either intra or extra ventricular or signs of raised intracranial pressure.   [Yes/No]