A medical device for aspirating and injecting fluid into a body cavity for use with first and second syringes is provided. The medical device includes an outer needle having an outer lumen formed therethrough. A distal end of the outer needle is configured to puncture tissue for insertion of the needle into the body cavity. An inner cannula is disposed within the outer lumen and has an inner lumen formed therethrough. A distal end of the inner cannula is disposed within the outer lumen. A hub has a first hub opening for fluidly connecting the first syringe to the outer lumen and a second hub opening for fluidly connecting the second syringe to the inner lumen. The inner cannula extends from at least one of the first and second hub openings to the distal end of the inner cannula. A method for treating a cyst is also provided.