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Keywords:
Paediatric, CNS, MR, CT, Diagnostic procedure, Developmental disease
Authors:
N. K. Altinbas , G. Güral, A. Güneş, B. E. Yildiz Derinkuyu , H. Akmaz Ünlü; Ankara/TR
DOI:
10.1594/ecr2015/C-0010
Results
The patients ranged in age from 7 to 14 years.
The indications for scanning included NF (neurofibromatosis) type 1 (1/6),
papilledema (2/6),
epilepsy (1/6),
6th nerve palsy (1/6),
and headache (1/6).
Arrested pneumatization was detected incidentally in all patients.
Four patients presented arrested pneumatization of the sphenoid bone (figure 1),
and 2 patients presented arrested pneumatization of the temporal bone (petrous temporal apex) (figure 2).
Neither clivus nor occiput involvement were found in the study group.
Different from other studies in the literature,
two of our patients had temporal bone apex involvement.
The patient who received CT scan had the findings of well-circumscribed,
sclerotic margins,
with narrow transition zone,
regions of internal fat density zones,
internal soft-tissue density and curvilinear internal calcifications (figure 1).
When evaluated according to MRI findings,
three of six patients had increased T1 signal region (fatty).
Six patients had predominantly high signal on T2-weighted images.
None of the patients exhibited low signal predominance on T2-weighted images.
In two patients who received gadolinium injection,
no enhancement was observed (Table 2).
Two patients who received MR venography did not exhibit any anomalies.
MR Findings (n=6)
|
Frequency
|
Regions of increased T1 signal (fat signal)
|
3/6
|
Predominantly high signal on spin-echo T2-weighted images
|
6/6
|
Predominantly low signal on spin-echo T2-weighted images
|
0/6
|
Post-gadolinium contrast enhancement (n=2)
|
0/2
|
Table 2.
MR findings of arrested skull base pneumatization.