What are the characteristic imaging findings associated with Neurofibromatosis type 1, and which chromosome is implicated in this condition?

Neurofibromatosis type 1 (NF1), linked to mutations on chromosome 17, presents with MRI findings such as T2 hyperintensities in the white matter and basal ganglia, often referred to as 'unidentified bright objects' (UBOs). Other key features include dural ectasia, optic pathway gliomas, sphenoid wing dysplasia, and ribbon-like rib thinning. Plexiform neurofibromas, café au lait spots, and Lisch nodules are also characteristic. Vascular abnormalities, such as stenoses, can mimic other vascular pathologies. Recognizing these findings is crucial for diagnosis, as they can be mistaken for other conditions like multiple sclerosis or leukodystrophies.