Robot-assisted removal of a lymphocyst causing severe neuralgic pain and adductor atrophy.

Following a robot-assisted radical hysterectomy and pelvic lymphadenectomy for early-stage cervical cancer, a 53-year-old woman was diagnosed with a 50-mm right-sided pelvic lymphocyst by the use of vaginal ultrasonography. She gradually developed intermittent increasingly severe neuralgic pain mimicking a meralgia paresthetica. A neurolysis was proposed by the neurosurgeons. Awaiting this intervention, a pelvic MRI revealed a partial atrophy of the ipsilateral adductor muscles and a probable entrapment of the obturator nerve by the lymphocyst as an alternative cause of the pain. Using a four-arm da Vinci-S-HD robot the lymphocyst, located deep in the right obturator fossa and surrounding the obturator nerve, was completely removed, sparing the partially atrophic obturator nerve. No bleeding occurred. The surgery time was 95 min. At 10 months' follow-up the patient was relieved of her pain with no signs of a new lymphocyst.