Intestinal obstruction is common surgical emergency, ileosigmoid knot is a rare cause of intestinal obstruction (a loop of ileum and sigmoid colon twisted around each other in a knot). This knot is common in Negro people. About 150 cases recorded in literatures, but we recorded a more six cases in Basrah General Teaching Hospital in the last 10 years.

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LASER (Light Amplification by Stimulated Emission of Radiation), is a mechanism of emitting electromagnetic radiation typically light as a process of stimulated emission. Common light sources(electric light bulb)→Emit photons in all directions, usually over a wide spectrum of wavelengths. Host light sources are incoherent LASER→Emit photons in a narrow, well defined beam of light. The light is often nearmonochromatic, consistency of single narrow wavelength. It is highly coherent and is often polarized. LASER was introduced to practice in 16 May 1960 1,2 . Laser introduce into medicine at early 1970 11 . LASER in Medicine: various types of laser are used in medicine for diagnosis, treatment and therapy.

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