Hi. Thanks for your query. Noted the history of a hardened lump of the size of a ping pong ball on the right side of the naval after a liposuction procedure. Seroma was drained three times during 7 months period. I would advise you the following in such a situation: Get a high resolution ultrasonography or MRI of the lesion to know the exact cause. If this is a seroma, re-aspiration will help. If this is a mass of any nature, you will need a surgery to remove it. Follow the Surgeon s advise as he has examined you.