Neurological Presentations of COVID-19: Characteristic Features in a Case Series of Hospitalized Patients from Abu Dhabi, UAE

Figure 4

Brain imaging showing brain abnormalities in 10 patients (a–j). (a) Noncontrast CT head showing minor periventricular hypodensity suggestive of small vessel-related ischemia. (b) Noncontrast CT head showing multifocal white matter hyperdense foci suggestive of petechial haemorrhages (arrows pointing to areas of haemorrhage). (c) Noncontrast CT head showing old (big arrow) and evolving/new (small arrow) right MCA territory infracts. (d) (A) CT head showing low attenuation in the left internal capsule (B), (C) MRI showing left internal capsule high signal on diffusion weighted and FLAIR sequences, and (D) MRI gradient echo sequences showing blooming artifact suggesting blood break down products. (e) Axial and coronal non contrast CT head showing acute left cerebellar infract. (f) Noncontrast CT head showing a small area of low attenuation in the left internal capsule suggestive of a focal infract. (g) Noncontrast CT head showing (A) dense superior sagittal sinus (SSS) suggestive of venous sinus thrombosis, (B) haemorrhagic venous infract, and (C) CT venogram showing nonopacification of SSS (empty delta sign) due to venous sinus thrombosis. (h) Noncontrast CT head showing (A) lacunar infract left pons and (B) periventricular low attenuation changes in keeping with small vessel ischemia. (i) (A) Axial and sagittal noncontrast head CT showing marked sulcal effacement, extensive oedema, and loss of grey-white matter differentiation. (B) Sagittal section shows herniation of cerebellar tonsils. Appearances in keeping with severe cerebral oedema with coning. (j) Postcontrast CT (A) and MRI (B) of head showing focal enhancing lesion in the right frontal lobe.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

(j)