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Subtle hypointensity within the lateral aspect of the right internal auditory canal could represent a flow artifact, volume averaging of adjacent bone or possibly may represent a very hypoplastic right cochlear nerve which, if real, demonstrates abnormally lateral/distal branching off of the right vestibular nerve. | 1 |
COMPARISON: None FINDINGS: On the right side, there is narrowing of the otherwise patent external auditory canal particularly in the superoinferior direction. | 1 |
There is no soft tissue thickening of the external auditory canal. | 0 |
The tympanic membrane contains a myringotomy tube which is somewhat ill defined and appears to contains small amount of tissue. | 1 |
There are no air cells adjacent to the epitympanum or above the roof of the external canal. | 1 |
The tympanic membrane contains a myringotomy tube and is unremarkable. | 0 |
The mastoid sinuses appear small for age of patient. | 1 |
The soft tissue density material is located lateral and superior to the ossicles and fills the entire mastoid sinus. | 1 |
The soft tissue density material is located lateral and superior to the ossicles and fills the entire mastoid sinus. | 1 |
The tegmen tympani is very low lying and there are only very small air cells interposed between the temporal lobe and the roof of the right external auditory canal which is slightly decreased in the superoinferior diameter. | 1 |
With an infiltrative cholesteatoma one would expect more encircling of the ossicles. | 1 |
COMPARISON: None FINDINGS: On the left side, the external auditory canal is patent. | 0 |
The vestibular aqueduct is moderately enlarged. | 1 |
The vestibular aqueduct is visualized, but normal in size. | 0 |
IMPRESSION: Enlargement of the left vestibular aqueduct. | 1 |
There is mild enlargement of the left vestibular aqueduct which can be associated with sensorineural hearing loss. | 1 |
The intracanalicular portion of the left cochlear nerve appears slightly thin when compared to the opposite side. | 1 |
The vestibular nerve appears unremarkable. | 0 |
IMPRESSION: Slightly thin appearance of the intracanalicular left cochlear nerve. | 1 |
COMPARISON: [**Date**] FINDINGS: Again noted are postsurgical changes in the region of the left mastoid status post left wall up mastoidectomy. | 1 |
New bone formation is seen along the lateral aspect of the mastoid, most likely postsurgical in nature. | 1 |
The scutum remains fairly sharp in appearance. | 0 |
The ossicles are normal in appearance, with the footplate of the stapes is surrounded by a small amount of residual soft tissue. | 0 |
The ossicles are normal in appearance, with the footplate of the stapes is surrounded by a small amount of residual soft tissue. | 0 |
The ossicles appear intact. | 0 |
The ossicles are intact, but the short process of the incus approximates the tympanic cavity wall. | 1 |
The ossicles are intact, but the short process of the incus approximates the tympanic cavity wall. | 1 |
The ossicles are intact, but the short process of the incus approximates the tympanic cavity wall. | 1 |
Please see below comments regarding left sigmoid plate and mastoid air cells. | 1 |
There is erosion of the posterior wall of the mastoid air cells/sigmoid plate. | 1 |
In addition, there are erosive changes of superior wall of the mastoid process. | 1 |
There is erosion of the incus, suggesting chronic changes.The tympanic membrane is not visualized. | 1 |
There is erosion of the incus, suggesting chronic changes.The tympanic membrane is not visualized. | 1 |
Erosion of the lateral wall of the left mastoid air cells with soft tissue abscess extending anterior and situated lateral to the left TMJ joint. | 1 |
Erosion of the left incus, suggesting previous chronic changes. | 1 |
FINDINGS: On the right side, there is a small amount of soft tissue material, most likely cerumen, within the external auditory canal. | 1 |
On the left side, there is a small amount of soft tissue material, most likely cerumen, within the external auditory canal. | 1 |
The mastoid air cells are slightly less pneumatized on the right side when compared to the left. | 1 |
The lenticular process of the incus is absent, and only a small fragment resembling the stapes is seen in the oval fossa with abnromal oval window. | 1 |
The lenticular process of the incus is absent, and only a small fragment resembling the stapes is seen in the oval fossa with abnromal oval window. | 1 |
In addition, there is a bony septum that runs anteroposteriorly transecting the tympanic cavity and interrupting the articulation between the incus (which lacks the tip of the long process and the lenticular process) and the stapes (which appears small). | 1 |
In addition, there is a bony septum that runs anteroposteriorly transecting the tympanic cavity and interrupting the articulation between the incus (which lacks the tip of the long process and the lenticular process) and the stapes (which appears small). | 1 |
In addition, there is a bony septum that runs anteroposteriorly transecting the tympanic cavity and interrupting the articulation between the incus (which lacks the tip of the long process and the lenticular process) and the stapes (which appears small). | 1 |
The vestibule-cochlear nerves are seen and appear normal. | 0 |
The vestibule-cochlear nerves are seen and appear normal. | 0 |
COMPARISON: None FINDINGS: TEMPORAL BONES: On the right side, the external auditory canal is patent. | 0 |
The mastoid air cells and paranasal sinuses are clear. | 0 |
There is also a segmentation anomaly of the right cochlea with poor segmentation between the middle and apical turns, and slightly decreased turns in the distal right cochlea. | 1 |
The vestibulo-cochlear nerves are seen and unremarkable. | 0 |
Enlarged right endolymphatic duct in association with segmentation anomaly of the distal right cochlea. | 1 |
The cochlear nerves are present and appear normal in size bilaterally. | 0 |
COMPARISON: None FINDINGS: A small amount of soft tissue is present in the external auditory canal bilaterally, likely secondary to presumed retained cerumen. | 1 |
The facial nerve and superior/inferior divisions of the vestibular nerves are seen and appear normal. | 0 |
The left cochlear nerve cannot be identified and may be absent or markedly hypoplastic. | 1 |
Trace right sided mastoid disease is noted. | 1 |
The visualized paranasal sinuses and mastoid air cells are clear. | 0 |
The mastoid air cells are clear bilaterally. | 0 |
The remainder of the visualized paranasal sinuses and mastoid air cells are clear. | 0 |
The paranasal sinuses, middle ear cavities, and mastoid air cells are clear. | 0 |
The middle ear cavities , mastoid air cells are clear. | 0 |
The paranasal sinuses and mastoid air cells are otherwise clear. | 0 |
There has been clearing of the previously described inflammatory changes in the paranasal sinuses and mastoid air cells. | 0 |
Interval resolution of the inflammatory changes in the paranasal sinuses and mastoid air cells. | 1 |
The internal auditory canal is small and there is a severely stenotic portion proximally. | 1 |
The vestibulo-cochlear nerves are thinning and the cochlear division is barely seen. | 1 |
IMPRESSION: Diffusely small right internal auditory canal, with a severely stenotic proximal portion. | 1 |
Thinning of the vestibulocochlear nerve with possible very hypoplastic/aplastic cochlear nerve. | 1 |
The visualized portions of the orbits, and mastoid air cells are grossly unremarkable. | 0 |
Lesion within the inferior right cerebellum demonstrates an exophytic component which extends along course of right cranial nerves VII and VIII and into the right internal auditory canal, and is more prominent since prior exam. | 1 |
The middle ear cavities and mastoid air cells are clear. | 0 |
There is subtle increased density in the basal turn of the cochlea and there is minimal irregularity of the wall of the lateral semicircular canal with faint increased density. | 1 |
There is subtle increased density in the basal turn of the cochlea and there is minimal irregularity of the wall of the lateral semicircular canal with faint increased density. | 1 |
The there is slight sclerosis in the basal turn of the cochlea as well as a prominent focus of sclerosis with narrowing in the lateral semicircular canal. | 1 |
The there is slight sclerosis in the basal turn of the cochlea as well as a prominent focus of sclerosis with narrowing in the lateral semicircular canal. | 1 |
Region of sclerosis and narrowing within the left lateral semicircular canal as well as faint sclerosis within the basal turn of the cochlea consistent with early changes of labyrinthitis ossificans. | 1 |
Region of sclerosis and narrowing within the left lateral semicircular canal as well as faint sclerosis within the basal turn of the cochlea consistent with early changes of labyrinthitis ossificans. | 1 |
There appear to be more subtle changes of sclerosis on the right with a faint increased density in the basal turn of the right cochlea and also there appears to be minimal irregularity of the wall of the lateral semicircular canal. | 1 |
There appear to be more subtle changes of sclerosis on the right with a faint increased density in the basal turn of the right cochlea and also there appears to be minimal irregularity of the wall of the lateral semicircular canal. | 1 |
The mastoid air cells are well-pneumatized and clear, noting partial right mastoidectomy. | 0 |
COMPARISON: None FINDINGS: There is a widely patent communication between the cochlea and vestibule bilaterally, more prominent on the left than the right. | 0 |
The cochlea appears otherwise unremarkable. | 0 |
The vestibule is slightly prominent. | 1 |
IMPRESSION: Widely patent communication between the cochlea and vestibule bilaterally, more prominent on the left than the right. | 1 |
This deformity is reportedly commonly associated with stapes foot plate deformities and facial nerve dehiscence and may also be associated poor candidacy for cochlear implantation. | 1 |
The paranasal sinuses and right mastoid air cells are clear. | 0 |
There is focal retraction of the inferior half of the left tympanic membrane with associated irregular soft tissue thickening surrounding a left myringotomy tube and extending anteriorly and superiorly along the tympanic membrane including along the handle of the malleus. | 1 |
There is focal retraction of the inferior half of the left tympanic membrane with associated irregular soft tissue thickening surrounding a left myringotomy tube and extending anteriorly and superiorly along the tympanic membrane including along the handle of the malleus. | 1 |
There is thin soft tissue density in posterolateral attic just lateral to the incus. | 1 |
The head and body of the incus are clear. | 0 |
IMPRESSION: Focal inferior retraction of the left tympanic membrane with associated irregular soft tissue thickening surrounding a left myringotomy tube and extending anteriorly inferior to the ossicles. | 1 |
IMPRESSION: Focal inferior retraction of the left tympanic membrane with associated irregular soft tissue thickening surrounding a left myringotomy tube and extending anteriorly inferior to the ossicles. | 1 |
However the internal auditory canal is markedly patulous. | 1 |
The semicircular canals and cochlea are within normal limits. | 0 |
The semicircular canals and cochlea are within normal limits. | 0 |
The vestibule is patulous. | 1 |
On the right side, there is marked cystic dilatation of the vestibular aqueduct, measuring 11 mm in anteroposterior diameter. | 1 |
On the left side, there is marked cystic dilatation of the vestibular aqueduct, measuring 10 mm in anteroposterior diameter. | 1 |
Bilateral markedly enlarged vestibular aqueducts and endolymphatic ducts with associated patulous internal auditory canals and vestibules. | 1 |
Bilateral markedly enlarged vestibular aqueducts and endolymphatic ducts with associated patulous internal auditory canals and vestibules. | 1 |
Bilateral markedly enlarged vestibular aqueducts and endolymphatic ducts with associated patulous internal auditory canals and vestibules. | 1 |
Subsets and Splits