What Is a Kidney Abscess?
Renal abscess refers to a local or whole kidney tissue infection caused by a purulent infection in a certain part of the body or the bloodstream reaching the renal cortex. Renal abscess is a purulent infection of the renal cortex. It is a serious infection caused by staphylococcal blood transfusion into the renal cortex. The early stage is edema, accompanied by a number of small abscesses. Small abscesses can jointly form infectious masses. In severe cases, necrosis liquefies A typical kidney abscess is formed when obvious. Mostly caused by blood-borne infections can also be caused by retrograde urinary tract infections.
- Chinese name
- Renal abscess
- Foreign name
- renal abscess
- Renal abscess refers to a local or whole kidney tissue infection caused by a purulent infection in a certain part of the body or the bloodstream reaching the renal cortex. Renal abscess is a purulent infection of the renal cortex. It is a serious infection caused by staphylococcal blood transfusion into the renal cortex. The early stage is edema, accompanied by a number of small abscesses. Small abscesses can jointly form infectious masses. In severe cases, necrosis liquefies A typical kidney abscess is formed when obvious. Mostly caused by blood-borne infections can also be caused by retrograde urinary tract infections.
Causes of kidney abscess and common diseases
- Several small abscesses are formed in the renal cortex, which can also invade the renal medulla. The small abscesses gradually merge into larger renal abscesses. About 50% of kidney abscess infections spread to the renal capsule and invade the perirenal space, forming a perirenal abscess. Clinically, it is manifested as sudden onset, fever, pain in the kidney area and muscle tension, leukocytosis in the urine, and pathogenic bacteria can grow in urine culture.
Differential diagnosis of renal abscess
- CT manifestations: Renal abscess manifestations vary depending on the stage of the disease. In the early stage of inflammation, the abscess has not been localized. It is manifested as a slightly low-density mass in the renal parenchyma, and enhanced examination may be slightly irregularly enhanced. In the mature stage of the abscess, it appears as a uniform, low-density, round-shaped, clear or fuzzy edge. Surrounded by a slightly high-density ring of varying thickness, the enhanced examination showed obvious ring-shaped enhancement, representing the abscess wall, while the central low-density area was not reinforced, and it was a pus cavity, and low-density gas shadows were also visible in some pus cavities. Renal abscess infection can be seen when the perinephric space spreads. When combined with perirenal and pararenal abscesses, the perirenal and pararenal fat space disappeared, and replaced with a mixed density mass with small air bubbles inside. The enhanced examination showed regular or irregular single or multiple circular enhancement.
Kidney abscess examination
- Renal abscesses are combined with clinical and laboratory data to make diagnosis more difficult. CT examination can clearly show the relationship between the renal chapel, the surrounding space of the kidney and its adjacent structures, and can guide clinical treatment. CT is not typical for clinical manifestations and early diagnosis of abscess is difficult to distinguish from renal cell carcinoma. It needs to be combined with clinical, short-term follow-up and even fine needle aspiration biopsy to confirm the diagnosis. In general, regardless of the location and scope of the abscess, it will lead to different degrees of dysfunction of the kidney on the disease side, manifested as weaker CT enhancement than normal kidneys. This is an important feature of inflammatory kidney disease. MRI has some significance in the examination of renal abscess, but it is not routine.
Renal abscess treatment principles
- Ultrasound-guided puncture for renal abscess, because of its small damage, low cost, and few complications, it can clearly show the position of the pus cavity in the kidney. It can determine the needle penetration point, angle and depth of skin puncture, which greatly improves In order to avoid the puncture success rate, it can also avoid the pain caused by surgical trauma to patients and shorten the course of disease, so it is widely used.
- When ultrasound guided puncture is used to treat renal abscess, the key to successful puncture is accurate ultrasound positioning. Ultrasound guidance is easy to show the puncture needle outside the abscess as it enters the abscess because of its peculiar acoustic beam thickness. The choice is important. First of all, according to the position of the pus cavity in the kidney and the distance from the epidermis before surgery, a well-adjusted body position and puncture site should be selected, including the puncture point, needle angle and depth. Second, avoid large blood vessels in the kidney, liver, spleen, lung, and intestine. During the aspiration process, flush as much as possible, and then inject drugs. Talk to the patient about the puncture procedure before surgery, eliminate the patient's nervousness, and instruct the patient to hold their breath to prevent deviation due to breathing during puncture.
- Renal abscesses, such as abscesses that are not liquefied in the early stage, or there are many necrotic matter in the abscess, the pus is viscous, and there is a strong light mass on the sonogram, which is very similar to the substantial space in the kidney. It is easily misdiagnosed as renal cancer or renal tuberculosis. Dynamic observation and puncture It is helpful for differential diagnosis and can improve the ability to diagnose abscesses. According to relevant data reports, the percutaneous diagnosis of renal abscess can reach 100% with ultrasound-guided percutaneous guided puncture. The pus obtained from the puncture can be routinely and cytologically, biochemically, bacteriologically, and susceptibly tested. Etiological diagnosis is of great help to clinical medication.