CPT® Code 45100

A biopsy of the anorectal wall is a medical procedure that involves the removal of a small sample of tissue from the wall of the anorectal region. This procedure is typically performed through the anal approach and is indicated for various conditions, including congenital megacolon, which is also known as Hirschsprung's disease. Congenital megacolon is characterized by an abnormal dilation or enlargement of the colon, resulting from the absence or a significantly reduced number of ganglion cells that are normally present in the muscular wall of the rectum and colon. These ganglion cells are essential for the proper functioning of the bowel, and their deficiency can lead to severe constipation and other gastrointestinal complications. During the biopsy, the specific area of the anorectal wall that requires examination is carefully identified and cleansed to minimize the risk of infection. A local anesthetic is then administered to ensure patient comfort during the procedure. Following this, an incision is made in the anorectal wall, allowing for the extraction of a tissue sample. This sample is subsequently prepared and sent for laboratory evaluation, which is reported separately. The biopsy is a critical diagnostic tool that aids in the assessment of underlying conditions affecting the anorectal region.