This is the simplest form of testicular biopsy, done as an outpatient procedure. It is performed using a needle that is connected to a syringe for aspiration, the surgeon will initially inject small dose of local anaesthetic into the skin overlying the testis and then insert a needle directly into the testis, and while the syringe is on the aspiration mode, tissues from within the testis are sucked through the needle. Tissue fragments aspirated from the testis are then pulled and collected in specific tubes for analysis. This is usually done at a facility where immediate examination of the tissues is possible.