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.
Because symptoms of ALS can be similar to those of a wide variety of other, more treatable diseases or disorders, appropriate tests must be conducted to exclude the possibility of other conditions. One of these tests is electromyography (EMG), a special recording technique that detects electrical activity in muscles. Certain EMG findings can support the diagnosis of ALS. Another common test measures nerve conduction velocity (NCV). Specific abnormalities in the NCV results may suggest, for example, that the patient has a form of peripheral neuropathy (damage to peripheral nerves) or myopathy (muscle disease) rather than ALS.