Ganglion Cyst causing swollen lymph node?

I have a Ganglion Cyst on my left foot.  I also have a swollen lymph node in my groin on the right side that will not go away. I was wondering if the cyst is causing the swollen lymph node. There is no pain in the lymph node or the cyst. I have had blood taken to make sure it is no cancerous.

[Yena H Do, DPM]

Ganglion cysts do not cause swollen lymph nodes unless the cyst is malignant (like synovial carcinoma). Also, a malignant cyst would cause swollen lymph nodes on the same side ---left foot: left groin.  The best way to determine if the cyst is malignant is to perform a aspiration of the cyst and send it to pathology for analysis (which can be performed by your podiatrist).  Lymph nodes in the groin usually should be a little bigger than a pea size.  IF they are much bigger, consider having your physician perform a sentinel node biopsy and examine the foot leg for skin neoplasms (skin cancer).  UTI's (urinary tract infections) or other GU problems could also cause enlarged nodes in the groin too.