<s>[INST] <<SYS>> This is a medical question of type : exams and tests <</SYS>> How to diagnose Urachal cyst ? [/INST] How is a urachal cyst diagnosed? The diagnosis of a urachal cyst may be suspected based on the presence of characteristic signs and symptoms. The following tests may then be ordered to confirm the diagnosis: Ultrasound Magnetic Resonance Imaging (MRI scan) Computed Tomography (CT scan) </s>