Teaching NeuroImages: Advanced imaging of neurosarcoidosis with 68Ga-DOTATATE PET/CT

Teaching NeuroImages: Recurrent oculomotor palsies caused by neurosarcoidosis.

Teaching NeuroImages: diffuse cerebral neurosarcoidosis mimicking gliomatosis cerebri.

A 30-year-old man with a history of bipolar disease presented with 6 months of cognitive decline, unsteady gait, urinary retention, and bilateral upper extremity tremors. Multiple punctate enhancing lesions were seen on brain MRI (figure). Differential diagnosis included infection (viral, tuberculosis, or cryptococcus), toxic leukoencephalopathy, gliomatosis cerebri, angiocentric lymphoma, and ...

Meningiomas: A Comparative Study of 68Ga-DOTATOC, 68Ga-DOTANOC and 68Ga-DOTATATE for Molecular Imaging in Mice

PURPOSE The goal of this study was to compare the tumor uptake kinetics and diagnostic value of three (68)Ga-DOTA-labeled somatostatin analogues ((68)Ga-DOTATOC, (68)Ga-DOTANOC, and (68)Ga-DOTATATE) using PET/CT in a murine model with subcutaneous meningioma xenografts. METHODS The experiment was performed with 16 male NUDE NU/NU mice bearing xenografts of a human meningioma cell line (CH-157...

Twins in spirit - episode I: comparative preclinical evaluation of [68Ga]DOTATATE and [68Ga]HA-DOTATATE

BACKGROUND Recently, an intra-patient comparison demonstrated that the somatostatin (sst) ligand [(68)Ga]HA-DOTATATE ([(68)Ga]DOTA-3-iodo-Tyr(3)-octreotate) provides PET images comparable to or superior to those obtained with [(68)Ga]DOTATATE. To provide a comprehensive basis for nevertheless observed slight differences in tracer biodistribution and dosimetry, the characteristics of [(68)Ga]HA-...

Teaching neuroimages: MRI in advanced neuromyelitis optica.

A 51-year-old woman was treated with multiple medications for relapsing-remitting multiple sclerosis (MS) over 20 years, including interferons and glatiramer, but continued to have recurrent attacks of optic neuritis and transverse myelitis, leading to bilateral blindness and triplegia. Even with MS-type lesions onMRI, neuromyelitis optica (NMO) was ultimately suspected and confirmed by detecti...