Fig. 26.1 CNS PML-IRIS. The patient was HIV positive and presented with subacute onset of right-sided weakness, slurred speech, and left beating nystagmus. The CD4 count at admission was 5…

Fig. 7.1 Heroin-induced leukoencephalopathy (chasing the dragon). Axial FLAIR images (a–d) and ADC maps (e–h) show diffuse confluent cerebral white matter signal abnormality with restricted diffusion that spares the subcortical…

Fig. 23.1 Cyclosporine-induced PRES. Axial FLAIR (a–c) and SWI (d) MR images show cortical and subcortical hyperintensity within the posterior frontal lobes, parietal lobes, and occipital lobes. In addition, there…

Fig. 32.1 Warfarin-associated intracranial hemorrhage. The patient underwent anticoagulation for a left MCA cardioembolic stroke shortly after atrial fibrillation ablation procedure. Axial non-contrast CT (a), axial DWI (b), and axial…

Fig. 22.1 Ipilimumab-induced hypophysitis. The patient has a history of metastatic melanoma treated with ipilimumab. Initial sagittal post-contrast T1 MRI (a) shows a normal pituitary gland and stalk. Sagittal and…

Fig. 47.1 Venous sinus thrombosis associated with oral contraceptive use. Axial noncontrast CT image (a) shows hyperattenuation of the internal cerebral veins and straight sinus (arrows). The corresponding T2*GRE MRI…

Fig. 35.1 Supplemental oxygen. Axial FLAIR MR images (a, b) show diffuse sulcal hyperintensity. The corresponding axial post-contrast T1-weighted (c) and susceptibility-weighted (d) MR images show no associated abnormal enhancement…

Fig. 31.1 Intraparenchymal hematoma related to aspirin and Plavix. Axial (a) and coronal (b) non-contrast CT images show a large right cerebral hemisphere hematoma with associated midline shift to the…

Fig. 55.1 Rhinitis medicamentosa. Axial (a) and coronal (b) CT images show marked mucosal thickening of the bilateral inferior turbinates (arrows), with resultant nasal airway obstruction 55.4 Differential Diagnosis Allergic…

Fig. 43.1 Diffuse AACE inhibitor induced angioedema. Axial contrast-enhanced CT image shows circumferential mucosal pharyngeal swelling (arrows) and diffuse stranding of the parapharyngeal and subcutaneous fat bilaterally Fig. 43.2 Focal…