Definition Perirenal abscess is a pocket of pus caused by an infection around one or both kidneys. Alternative Names Perinephric abscess Causes, incidence, and risk factors Most perirenal abscesses are caused by urinary tract infections that start in the bladder, spread to the kidney, and then spread to the area around the kidney. Other causes of perirenal abscess include surgery in the urinary tract or reproductive system and bloodstream infection. The biggest risk factor for perirenal abscess is kidney stones that block the flow of urine and provide a place for an infection to grow. Bacteria tend to stick to the stones and antibiotics can't kill the bacteria there. Stones are found in 20 - 60% of patients with perirenal abscess. Other risk factors for perirenal abscess include: Diabetes Having an abnormal urinary tract Trauma
Definition An epidural abscess is a collection of pus (infected material) between the outer covering of the brain and spinal cord and the bones of the skull or spine. The abscess causes swelling in the area. Alternative Names Abscess - epidural; Spinal abscess Causes, incidence, and risk factors Epidural abscess is a rare disorder caused by infection in the area between the bones of the skull or spine, and the membranes covering the brain and spinal cord (meninges). This infection is called an intracranial epidural abscess if it is inside the skull area, or a spinal epidural abscess if it is found in the spine area. Most are located in the spine. The infection is usually caused by bacteria (S taphylococcus aureus is most common), but may be caused by fungus. It can be due to other infections in the body, or germs that spread through the blood. However, in some patients, no other source of infection is found. In the case of an intracranial epidural abscess (within the skull), risk factors incl...
Definition An anorectal abscess is a collection of pus in the area of the anus and rectum. Alternative Names Anal abscess; Rectal abscess; Perirectal abscess; Perianal abscess; anal gland abscess; Abscess - anorectal Causes, incidence, and risk factors Common causes of anorectal abscess include: Blocked gland in the area Infection of an anal fissure Sexually transmitted infection Deep rectal abscesses may be caused by intestinal disorders such as Crohn's disease . The following factors increase your risk for an anorectal abscess: Anal sex Chemotherapy drugs used to treat cancer Diabetes Inflammatory bowel disease (Crohn's disease and ulcerative colitis ) Use of medications such as prednisone Weakened immune system (such as from HIV / AIDS ) The condition may occur in infants and toddlers who are still in diapers and who have a history of anal fissures.
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