Causes for
groinGroin lump
Groin pain
Groin stretch
Jock itch
Swollen lymph nodes in the groin pain include a hernia, prostatitis, scrotal infections (if you are a male), as well as gynecological causes (i.e. fibroids, cysts) if you are female.
You noted that an ultrasound and MRI were negative. If you are male, I would consider tests for prostatitis (i.e. digital rectal exam with culture of the prostatic fluid) as well as a scrotal ultrasound to evaluate the anatomy of the scrotum and look for epididymitis.
If you are female, a referral to a gynecologist can be considered for further evaluation.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.