An anal abscess is an infected cavity filled with pus found near the anus or rectum. Ninety percent of abscesses are the result of an acute infection in the internal glands of the anus. Occasionally, bacteria, fecal material or foreign matter can clog an anal gland and tunnel into the tissue around the anus or rectum, where it may then collect in a cavity called an abscess. An anal fistula also commonly called fistula-in-ano is frequently the result of a previous or current anal abscess. Normal anatomy includes small glands just inside the anus. The fistula is the tunnel that forms under the skin and connects the clogged infected glands to an abscess.
Anal/Rectal Abscess: Overview, Causes, and Symptoms
An anorectal abscess also referred to as an anal abscess, rectal abscess, perianal abscess, or perirectal abscess depending on its location is a pus-filled cavity that forms within the furrows of the anal canal called the anal sinuses. Abscesses can form near or within the anus or develop much higher up in the rectum itself. While an abscess can form spontaneously for no apparent reason, it is commonly associated with gastrointestinal disease, bowel irregularities, immune suppression, and even certain medications. Anorectal abscesses are usually first recognized because of dull, throbbing pain in the anus or rectum, often accompanied by sharp pain when defecating. Perianal abscesses "peri-" meaning around are the most common type and can usually be identified visually as they occur in the upper layers of tissue. By contrast, perirectal abscesses tend to form deeper tissues and are often more felt than seen. Of the two types, a perirectal infection tends to be more serious.
We present the case of monochronic dizygotic twins with perianal abscesses coincident in chronology and morphology. This image typifies the features of infant perianal disease that suggest a congenital aetiology. Twin 1 weight 3.
Learn about our expanded patient care options for your health care needs. If one of these glands becomes clogged, it can get infected, and an abscess can develop. An anorectal abscess is a collection of pus under the skin in the area of the anus and rectum. In most cases, your healthcare provider can diagnose an anorectal abscess by looking externally at the anus and through a digital rectal exam.