Non-enhanced computed tomography (CT) scans, performed subsequently, confirmed the presence of intracortical calcification (Figure 2D), revealing a (
gyral) "tramtrack" pattern, obscured by blooming susceptibility effect on SWI scans (Figure 2C).
(2017), who reported that most of cerebral tuberculomas size ranging from 2 to 22.2 cm3.8 However, cerebral tuberculomas can present as solitary large lesion with
gyral enhancement similar to tumors as reported by Gameraddin M et al.
The brain weighed 150g after fixation, far below that expected (362g) for gestational age, and was grossly small and had a simplified
gyral pattern.
The loss of ASPM leads to a premature switch from symmetric to asymmetric cell division, decreasing the number of postmitotic neurons in the developing cortex, reflected in a reduced cortical surface area and a simplified
gyral pattern.
Variations of the age at which the peak weight of an organ is reached has been noted between populations, with
gyral atrophy occurring at 60-years of age (Andersen et al., 2003).
Experimental lesions made in the
gyral division of the anterior cingulate cortex (ACCg) affect normal patterns of social interest in other male or female macaques.
([dagger]) Brain abnormalities or microcephaly (congenital microcephaly [head circumference <3rd percentile for gestational age and sex], intracranial calcifications, cerebral atrophy, abnormal cortical
gyral patterns [e.g., polymicrogyria, lissencephaly, pachygyria, schizencephaly, gray matter heterotopia], corpus callosum abnormalities, cerebellar abnormalities, porencephaly, hydranencephaly, ventriculomegaly/hydrocephaly [excluding "mild" ventriculomegaly without other brain abnormalities], fetal brain disruption sequence [collapsed skull, overlapping sutures, prominent occipital bone, scalp rugae], other major brain abnormalities).
Other patterns described include
gyral distribution, T2 prolongation, and restricted diffusion involving the area of seizure origin or propagation (Figures 4 and 5).
CSF compartment has big influence on both signal topography and magnitude, resulting in strong signal attenuation for superficial sources on
gyral crowns [52].
Fischl et al., "An automated labeling system for subdividing the human cerebral cortex on MRI scans into
gyral based regions of interest," NeuroImage, vol.
On the basis of MR scans, more or less symmetrical hyperintense cortical and subcortical white matter lesions occur on T2-weighted images with
gyral and/or leptomeningeal contrast enhancement.
(19,59) Ultrasound and/or autopsy may reveal widespread brain calcifications (periventricular, cerebral parenchyma, thalami, and basal ganglia), cortical thinning with ventricular dilation, simplified
gyral patterns (eg, lissencephaly, pachygyria, agyria), and cerebellar hypoplasia.
