In this study the investigators want to compare the Endodrill instrument with FNA (both modalities EUS-guided) in terms of ability to obtain the correct diagnosis of submucosal tumors in the upper GI-tract. Patients diagnosed with suspected submucosal tumors in the upper GI-tract will be enrolled to this study. They will first go through examination with EUS. If the suspicion of a submucosal tumor is confirmed, the investigator will perform both EUS guided FNA and Endodrill biopsies in the same patient.The harvested tissue will be evaluated by senior pathologists to clarify which method that generates most correct diagnosis.