I'm new to this forum, and new to the world of melanoma. I was diagnosed with a stage 2a melanoma on my thigh in Dec. and had the wide excision and sentinel node biopsy done on 12/31. The nodes came back negative, which was a huge relief, and now I'm trying to educate myself on what I should be doing to prevent reoccurences. Recovery is mostly going well, except for a large lump that developed around the incision near the groin where the lymph nodes came out. There is one firm lump at the top of the incision, and then a larger one running most of the length of the 5" incision. The surgeon said it is likely a seroma, and that he could aspirate and drain it, but that they often come back. He recommends letting it go away on its own, which he said can take weeks or months. I'm hoping someone has gone through this, and has advice, or information about how long it takes, what to do, etc. I'm having a hard time finding much information about seromas, especially in the groin area. Sounds like they are more common in the armpits. It's not really painful just uncomfortable. Thanks.