Aims and objectives
To determine the outer,
middle and inner ear abnormalities associated with microtia in our population and any other abnormality of the temporal bone using HRCT
Methods and materials
Study design: we retrospectively included all patients with microtia who had CT scan of temporal bone from 2009 to 2016.
Source: we used PACS of medical imaging department in KAUH.
Expert certified Radiologist reviewed all patients and determined the findings on CT scan.
Data collection: all data collected on excel sheet and saved on password secured computer in the medical imaging department.
The statistician analyzed the findings.
Results
Total of 40 patients were collected.
6 patients had bilateral microtia resulting in total of 46 ears were analyzed.
No
count of Pinna Grading
%
Grade 1
2
4.3
Grade 2
18
39.1
Grade 3
26
56.5
Total
46
100
No
Count of EAC cartilaginous
%
Atresia
36
78.3
Stenosis
10
21.7
Total
46
100
No
Count of ossicles
%
Normal
2
4.3
Abnormal
44
95.7
Total
46
100
No
Middle ear cavity
%
Normal
28
60.9
Abnormal
18
39.1
Total
46
100
count
Inner...
Conclusion
Discussion: We found high frequency of outer and middle ear anomalies in patients with microtia,
similar to previous literature.
Inner ear anomalies were found in our group of patients is (13%) compared to reported in previous literature between 10% and 47%.
We found high frequency of TMJ deformity (shallow condylar fossa or hypoplastic and deformed mandibular head)- not previously described.
Conclusion:
There is strong correlation between microtia and outer and middle ear anomalies.
Inner ear anomalies were found seldom in our data.
Future Plan:
We...
Personal information
Dr.
Makki Almuntashri ,
MD,
FRCPC,
DABR
Neuro- and head and neck Radiologist,
King Abdulaziz Medical City,
Riyadh,
Saudi Arabia.
Head of imaging research at King Abdullah International medical research center.
Dr.
Maram Alhouri (C0-PI),
MBBS,
Radiology Resident,
King Abdulaziz Medical City,
Riyadh,
Saudi Arabia.
Dr.
Abin Thomas,
Statistician,
at King Abdullah International medical research center.
References
1- High-Resolution CT of the Temporal Bone in Dysplasia of the Auricle and External Auditory Canal.
T.
E.
Mayer,
H.
Brueckmann,
R.
Siegert,
A.
Witt,
and H.
Weerda.
AJNR Am J Neuroradiol 18:53–65,
January 1997.
2-High-Resolution CT Findings in Children with a Normal Pinna or Grade I Microtia and Unilateral Mild Stenosis of the External Auditory Canal.
R.
Jacob,
S.
Gupta,
B.
Isaacson,
J.W.
Kutz Jr,
P.
Roland,
Y.
Xi,
and T.N.
Booth Jacob.
Jan 2015 www.ajnr.org.
3-Genetics of microtia and associated syndromes.
F Alasti,1,2...
