Prominent, Rock Hard Belly - Diastasis Recti? (Male)

Men carry their fat on the inside of the abdominal cavity more than on the outside, which is where women carry more fat.  As a result, a man can have a big round tummy WITH VISIBLE ABS on some occasions in spite of an excess of body and abdominal fat.  A tummy tuck or liposuction will not fix this problem, since the fat must be lost in order to shrink the abdomen.  As a result, diet is the key to improvement rather than surgery.  Once the weight is lost, it's possible that skin removal might be needed, but often times there's not much loose skin, depending on how long the person was overweight and how extreme the weight gain/loss was. 

Thank you for your question and photographs, and I can see your area of concern. Based on his ultrasound findings, your husband has a separation of his "six-pack" muscles from his belly button up to his breast bone. In males this is most commonly caused by weight gain inside of the stomach, around his internal organs.  It is possible to fix this separation, but it will not significantly change is outer appearance.  I would recommend he pursue a healthy diet and exercise regimen, perhaps supported by a nutritionalist and trainer who can help him lose weight.  This weight loss will help reduce the protuberant aspect of his stomach, but may leave him with a bit of skin excess. Should this occur, a male tummy tuck can be performed to repair is separated muscles and remove any skin excess in a single setting. Hope that this helps. 

While diastasis recti may contribute to some of this protrusion, it is most likely caused by visceral fat. This fat is far below the skin and surrounds the organs. I would suggest following a healthy exercise and diet plan to help reduce these fat stores, then consider surgery if desired to repair the muscle separation.