Male gender dominated with 53.33% of cases against 46.67% of female cases. The age group of 0 to 05 months was the most frequent, with an average age of 1.2 months. ( Figure 1 )

Delayed psychomotor acquisition was the most frequent clinical information, with 26.6% of cases and 36.6% of cases coming for perilesional cerebral atrophy ( Table 1 ).

Brain CT and transfontanellar ultrasound were the two imaging methods used during our study. Brain MRI was not performed due to financial reasons and the unavailability of this examination. ETF was the most frequent examination, with 56.66% of cases being examined compared to 43.34% of cases seen on CT. ETF made a satisfactory contribution in confirming the diagnosis. She had found the following aspects: diffuse hyperechogenicity of the brain parenchyma with blurred limits indicating the presence of cerebral edema (13.3% of cases) with focal hyperechogenicity in a well-defined vascular territory which was related to cerebral ischemic lesions (23.3% of cases); hyperechogenic thickening of the choroid plexus related to intraventricular hemorrhage (25.2% of cases). Hyperechogenicity of the cerebral cortex and the subcortical, periventricular SB, and lenticular nuclei and poorly limited hyperechogenicity in heterogeneous range, seat of small cavitations indicating leukomalacia (16%) and ventricular dilatation in 22.2% of cases ( Figure 2 ).

The CT scan showed lesions precisely, and it found the following lesions: cerebral edema, which presented as non-systematized hypodensity in the range without enhancement or diffuse hypodensity of the supratentorial white matter respecting the brainstem with dedifferentiation of white matter/gray matter and erasure of cortical sulci in (20.3% of cases). Cerebral ischemic lesions presented as well-systematized cortico-subcortical hypodensity in (28.2% of cases). There were ventricular dilatations (hydrocephalus) in (26.3% of cases), and intracerebral hemorrhage as spontaneous intraparenchymal or gyriform hyperdensity in 25.2% of cases. ( Figure 3 and Figure 4 )

The associated lesions in our series observed on CT were numerous, and cerebral atrophy, which widened cortical grooves, was the most frequent associated lesion with 36.66% of cases, followed by microcalcifications presenting as spontaneous nodular hyperdensity in 10% of cases. ( Table 2 )

Our overall frequency was 4.83% of cases of anoxic-ischemic lesions, this result lower than that of Zanga Soré Moussa et al. [2] , who found an annual frequency of 77.7 cases of perinatal asphyxia and superimposable to that of Anthonioz in France who reported an annual average of 36 cases [4] . This difference could be explained by the fact that our study took place in the radiology and medical imaging unit of a medical clinic whose children were most referred for imaging exploration assessment by the pediatric unit of the reference health center, which is not as frequent in terms of neonatal. In our study, there was a male predominance with 53.33% of cases with a sex ratio of 1.14, identical results found in the literature with those of Zanga and Nagalo in Burkina Faso and Folquet in Ivory Coast [3] [5] who indicated respective rates of 1.8, 1.2 and 1.6. This male predominance would be related to a supposed biological fragility of male subjects. For Herbst, male sex would be a risk factor for perinatal anoxia [2] [6] . The age group of 0 to 05 months was the most frequent, with an average age of 1.2 months in our series, with results slightly lower than that of Zanga, who had found the most frequent age group of 6 - 8 days, or 32.6%, followed by that of 4 - 5 days, or 31.3%. The average age of the patients was 14 days in his series. And the delay in psychomotor acquisition was the most frequent clinical information, with 26.6% of cases, and 36.6% of cases came for perilesional cerebral atrophy. This result differed from that of Zanga, who had found respiratory distress in 42.9% of cases, followed by prematurity in 15% of cases [2] . This difference could be due to the sampling volume being too small and the origin of our patients in a center that is less equipped for the care of neonatal patients.

ETF was the most performed examination in our study, with a frequency of 56.66% of cases. This result was slightly lower than that of Zanga in Burkina Faso and much higher than that of N’zonou in Mali, who had respectively found 68.2% of cases and 20.8% of cases of pathological patients in ETF [2] [7] . It was more used because of its easy access, safety, simplicity, and low cost compared to other brain imaging methods, but also very important for the detection of lesions. The lesions found in ETF in our series were multiple, including cerebral edema in 13.3% of cases with cerebral ischemic lesions in 23.3% of cases, intraventricular hemorrhage in 25.2% of cases, leukomalacia in 16% of cases, and ventricular dilatation in 22.2% of cases. These lesions had been found in varying proportions by other authors in Africa. Berrada et al. in Morocco found 39% of ventricular dilatations, 32% of intraventricular hemorrhage, 3.9% of periventricular leukomalacia, and 3.9% of ventricular. Konan in Ivory Coast observed 45% of periventricular leukomalacia, 28.3% of ventricular dilatations, and 25% of cerebral hemorrhage [8] [9] . Cerebral hemorrhages and/or intraventricular hemorrhage observed in almost all studies in the literature are among the main lesions most visible on ETF in newborns and infants. Periventricular leukomalacia was observed in 16% of cases in our series, slightly lower than those found in the Zango study in 26.4% of patients, and constituted the 3rd cerebral lesion and represents the major cause of neurological sequelae, including cerebral palsy [2] [10] [11] . Brain CT was represented in our study in 43.34% of cases. It also observed multiple and varied lesions, including cerebral edema, cerebral ischemic lesions, hydrocephalus, and intracerebral hemorrhage. Brain CT has already been used in the literature to assess cerebral hemorrhages and edema secondary to hypoxic-ischemic damage [12] . In our series, hemorrhages represented 25.2% of cases and cerebral edema 28.2% of cases. MRI, being considered the preferred brain imaging modality, was not used in our study. However, in a comparative study of neuroimaging in newborns, all having undergone CT and MRI, they will have the same sensitivity in detecting anoxic-ischemic lesions such as strokes and white matter lesions [12] [13] . According to a retrospective study from 2014, CT was less likely to detect strokes and lesions of the central gray nuclei, brainstem, and cerebellum [12] [14] . CT uses X-rays, which should be avoided as much as possible in infants. She gives a bad contrast between gray matter and white matter that would have been due to the absence of myelination in the newborn brain [12] [15] . These data could weaken the use of CT in favor of MRI [12] [13] . But, CT would still remain an interesting alternative in cases where MRI would be difficult to access at a high cost or in patients who would be in a state too unstable to undergo a long MRI examination.