1. An apparatus to treat tissue of a patient, comprising: an arm coupled to a base, the arm comprising a first movable configuration and a second stiff configuration; a treatment probe to treat a patient, the probe comprising an outer elongate structure having a working channel and an inner carrier rotatable and translatable within the working channel to position and orient a nozzle to release a pressurized stream of fluid toward the tissue; a processor comprising instructions to rotate and translate the carrier to treat the patient a linkage coupled to the processor and the probe to rotate and translate the probe in response to the instructions.