Leon is one of the most important cities in the country. The center itself is an attractive destination due to its museums, art galleries, colorful colonial architecture, an imposing cathedral, and the facades of its churches. The city also has hotels, restaurants, local tour operators, bars and clubs.
Figure 8b. (a) CT scan demonstrates multiple neurofibromas (arrow) simulating enlarged lymph nodes in the retrocrural space and gastrohepatic ligament. (b) CT scan obtained in a different patient demonstrates neurofibromas (arrow) simulating extensive celiac adenopathy.
CT scanning and MRI play complimentary roles in assessment of perineural tumor spread. CT scans are superior to MRI for evaluating bony changes, which is important because a substantial portion of the trigeminal and facial nerves are surrounded by, or contained within, bony structures.his spread along the cisternal portion is true perineural tumor spread, whereas that within the pterygopalatine fossa is also perineural tumor spread but could be a pathway of least resistance in a bony canal. Perineural spread of tumor along the fifth and seventh cranial nerves (CNs).