Modified cholecystectomy (subtotal) for chronic calcular cholecystitis in cirrhotic patients presented in the 4th annual conference of Pan Arab Association of surgeons 30th Nov - 3rd Dec 1993 in Cairo. Published in Medical Journal of Cairo University. Laparoscopic cholecystectomy, evaluation studies. Published in Cairo University Medical Journal Vol. 62 No 1(253 - 2570.) Preliminary experience with FK-506 in renal allograft rejection. Presented and discussed in the South African Transplantation Society Congress of September 1995 and abstract published in South African Journal of Surgery. Effect of Modifying the order of graft revascularization on the renal reperfusions injury after renal transplant published in South African Journal of Surgery. Fistula In Ano: Why do they persist? Presented and discussed in SRS (Surgical Research Society of Southern Africa congress) 28 - 30 August 1996, Medunsa, Pretoria, South Africa.and published in congress proceedings. Roux-en-y diversion in post-gastrectomy biliary reflux. Published in Benha Medical Journal. Microcalculi of the common bile duct: a misdiagnosed problem. Endoscopy ;29 (3):222 Endoscopic subfascial perforator interruption and its role in varicose ulcer healing. Published in Benha Medical Journal. Combined endoscopic band ligation and sclerotherapy versus endoscopic sclerotherapy alone for treatment of bleeding oesophageal varices. Published in Endoscopy Operable breast cancer: Is there a role for sentinel lymph node biopsy in management of the axilla. Published in Benha medical Journal; Jan 2001. The role of Denver peritoneo-venous shunt in management of patients with refractory ascites. Published in Benha Medical Journal; Management of civilian colon injuries. Published in Benha medical Journal. Prospective randomized study evaluating the reduction of post-surgical adhesions by adhesion prevention solution. Published in Benha Medical Colonic "coloplasty" after total mesorectal exdision in cancer rectum:Preliminary study of functional and manometric results. Laparoscopic treatment of CBD stones "one step" laparoscopic approach to cholelethiasis and choledecholithiasis. Published in Benha Medical Journal. Management of solitary rectal ulcer syndrome. Presented and discussed in the 9th Annual conerence of the EGCRS; Sharm El- Sheikh. Surgical management of constipation and obstructed defecation. Presented and discussed in the 10th Annual Conference of the EGCRS; Sharm El-Sheikh June-2008. Reconstruction after Low Anterior Resection. Presented and discussed in the 11th Annual Conference of the EGCRS; Sharm El-Sheikh .