Hello As you mentioned that fat deposition is only on the fat . These measures may be useful for your husband, these include: 1 Heavy abdominal exercise under the guidance of gym expert or physiotherapist with diet control . Avoidance for fried , greasy foods with sweets is important. 2 Orlistate 120 mg medicine is also helpful. Doses : 120 mg thrice in day with each main meal containing fat, omit dose if meal is occasionally missed or has no fat. Side effects are faecal urgency & incontinence, flatulence , fatty stools or discharge , increased defecation nausea etc . This medicine should be taken under medical supervision. 3 Liposuction of belly fat .For this consult a surgeon . So all option are in front . Good luck.