Saw a patient with that with obvious severe attacks of groin pain with certain movements. Turned out to be an obturator nerve neuritis:
Severe or Neuropathic Groin Pain – Obturator Neuropathy | Pain Medical Musing
It responded to steroid obturator nerve block in groin but good luck finding someone to do it - tried to get an anesthetist to do one for me and ended up having to learn to do it myself..
good luck