Öz
While carpal tunnel syndrome (CTS) is the most common entrapment neuropathy in the upper extremity, the second most common entrapment neuropathy is ulnar nerve compression. Ulnar nerve compression mostly occurs at the elbow level and / or the guyon canal. Patients generally present with complaints of pain in the forearm, numbness in the 5th finger and half of the 4th finger, and loss of strength in the intrinsic muscles of the hand. In patients referring with these complaints, provocation tests are used in clinical examination. The most commonly used provocation tests are; Tinel Test and Ulnar Nerve Decompression Tests. The most important helpful diagnostic test is Electromyelography. Conservative and / or surgical treatment is applied in the treatment of the disease. In patients with mild ulnar nerve compression 50-60% success can be achieved with conservative treatment. Surgical treatment is recommended for patients whose symptoms do not decrease despite conservative treatment. As paw hand deformity and permanent deficits may develop due to muscle atrophy in patients with late diagnosis, surgical timing is important. In our study, age, gender, provocation tests, examination findings, electromyelography findings, co-morbid diseases of 12 patients who underwent simple ulnar nerve decompression between 2016-2020 in İnönü University Neurosurgery Clinic have been discussed in the light of the literature and the surgical results have been reported.