“…Baseline studies, including complete blood count (CBC), biochemistry profile, serum electrolytes, LFTs, and RFTs test, should be carried out to assess the patient's overall health. Other specific tests include EMG, NCS, CPK levels, TFTs, autoantibody screen (ANA and ENA profile), chest X-ray, and MRI should be done in all patients who are suspected of having ALS [1,12,13]. Some investigations such as muscle biopsy, tumor markers, blood gases, viral serology, serum B12 or folate levels, genetic testing, and cerebrospinal fluid (CSF) culture should be done when needed to rule out other differentials [1].…”