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Patient ReportsUnderstanding Retroperitoneal Fibrosis: Symptoms, Causes and Care
Written by Medicover Team and Medically Reviewed by Dr Avinash Gottumukkala , Urologists
Table of Contents
Retroperitoneal fibrosis (RPF) is a rare but serious condition characterized by the development of fibrous tissue in the retroperitoneum, the area behind the peritoneum of the abdominal cavity. This abnormal tissue can surround and compress the ureters, blood vessels, and other abdominal structures, resulting in significant health complications.
When the ureters become obstructed, urine may build up in the kidneys and cause hydronephrosis, kidney damage, or renal insufficiency. Early diagnosis and treatment are important to reduce inflammation, relieve obstruction, and protect kidney function.
What Are the Types of Retroperitoneal Fibrosis?
Retroperitoneal fibrosis is generally classified into two main types based on whether an underlying cause can be identified.
- Idiopathic Retroperitoneal Fibrosis: Also known as Ormond's disease, this is the most common type and develops without a clearly identifiable cause. Some cases may be associated with immune system abnormalities or IgG4-related disease.
- Secondary Retroperitoneal Fibrosis: This type develops due to an identifiable cause such as infections, certain medications, malignancies, autoimmune disorders, previous surgery, or radiation therapy.
What Are the Symptoms of Retroperitoneal Fibrosis?
The symptoms of retroperitoneal fibrosis can vary depending on the extent and location of the fibrous tissue. Symptoms may develop gradually and often become more noticeable when the ureters or nearby structures are compressed.
Pain
Pain is one of the most frequently reported symptoms and can be localized to the lower back, abdomen, or flank. The pain is often dull and persistent but can become severe in some cases.
Urinary Symptoms
Fibrous tissue can encase and compress the ureters, leading to urinary problems and kidney complications.
- Decreased urine output
- Difficulty passing urine
- Hematuria or blood in the urine
- Swelling of the kidneys due to urine build-up
Constitutional Symptoms
Some people may experience nonspecific symptoms caused by the underlying inflammatory process.
- Unexplained weight loss
- Fever
- Fatigue
- Malaise or a general feeling of being unwell
- Loss of appetite
Gastrointestinal Symptoms
If the fibrosis affects nearby abdominal structures, symptoms may include nausea, vomiting, abdominal discomfort, or changes in bowel habits.
What Causes Retroperitoneal Fibrosis?
The causes of retroperitoneal fibrosis can be classified into two broad categories: idiopathic and secondary. Idiopathic retroperitoneal fibrosis accounts for the majority of cases and has no clearly identifiable cause. Secondary retroperitoneal fibrosis can develop due to several underlying factors.
Infections
Certain infections have been associated with the development of RPF. Chronic infections such as tuberculosis and histoplasmosis can trigger inflammatory responses that may lead to fibrosis.
Medications
Some medications, including certain beta-blockers, methysergide, and specific analgesics, have been associated with secondary retroperitoneal fibrosis. These medicines may trigger inflammatory changes in the retroperitoneal space in susceptible individuals.
Malignancies
Cancers such as lymphomas, sarcomas, and carcinomas can lead to secondary retroperitoneal fibrosis. Tumours in or near the retroperitoneal space may cause an inflammatory and fibrotic response.
Autoimmune Disorders
Autoimmune conditions such as systemic lupus erythematosus and IgG4-related disease may contribute to the development of RPF. In these conditions, abnormal immune system activity causes inflammation and tissue fibrosis.
Other Causes
Previous abdominal or pelvic surgery, radiation therapy, and certain injuries may also contribute to secondary retroperitoneal fibrosis in some people.
When to See a Doctor for Retroperitoneal Fibrosis?
Medical evaluation is important if persistent back, abdominal, or flank pain occurs with urinary changes or unexplained general symptoms. A urologist, nephrologist, or internal medicine specialist can assess the condition and coordinate further tests and treatment.
You should see a doctor if you have:
- Persistent lower back, abdominal, or flank pain
- Reduced urine output, blood in the urine, or difficulty urinating
- Unexplained weight loss, fever, fatigue, or loss of appetite
Get medical help immediately if:
- You are unable to pass urine or have a sudden major decrease in urine output
- You develop severe flank pain with vomiting or worsening weakness
- You have signs of serious kidney problems, severe swelling, confusion, or breathing difficulty
These could be signs of a serious complication like kidney obstruction, which needs urgent care.
How Is Retroperitoneal Fibrosis Diagnosed?
Accurate and timely diagnosis of retroperitoneal fibrosis is essential for effective management. The diagnostic process typically involves a combination of clinical evaluation, imaging studies, laboratory tests, and sometimes a biopsy.
Clinical Evaluation
The diagnostic process begins with a detailed medical history and physical examination. The doctor may ask about symptoms, medication use, previous infections, autoimmune conditions, cancer history, surgery, and radiation treatment.
Imaging Studies
Imaging tests play a crucial role in identifying the location and extent of fibrous tissue and detecting complications.
- Computed Tomography (CT) Scan: A CT scan can show the location and extent of fibrous tissue and identify complications such as hydronephrosis.
- Magnetic Resonance Imaging (MRI): MRI provides detailed images of soft tissues and helps assess the involvement of surrounding structures.
- Ultrasound: Ultrasound can help detect kidney swelling and urinary obstruction and may guide further imaging studies.
Laboratory Tests
Blood and urine tests can help assess inflammation, kidney function, and possible underlying causes.
- Erythrocyte Sedimentation Rate (ESR) and C-Reactive Protein (CRP): Elevated levels may indicate an underlying inflammatory process.
- Renal Function Tests: Blood tests such as creatinine help assess kidney function and the effects of ureteral obstruction.
- Urine Tests: Urinalysis may help identify blood, infection, or other urinary abnormalities.
Biopsy
A biopsy may be recommended when imaging findings are unusual or when doctors need to rule out cancer or another condition. A small tissue sample is examined under a microscope to help confirm the diagnosis.
How Is Retroperitoneal Fibrosis Treated?
The treatment of retroperitoneal fibrosis aims to reduce inflammation, stop further fibrosis, relieve urinary obstruction, and protect kidney function. Treatment may include medical therapy, procedures to restore urine flow, surgery, and regular monitoring.
Medical Therapy
Medical therapy is often used to control inflammation and reduce the activity of the disease.
- Corticosteroids: These medicines are commonly used to reduce inflammation and may help shrink active fibrous tissue.
- Immunosuppressive Agents: Medicines such as azathioprine, methotrexate, or mycophenolate mofetil may be considered when corticosteroids are ineffective, unsuitable, or need to be reduced.
- Other Medicines: Additional medicines may be considered in selected cases based on the underlying cause and response to treatment.
Relieving Ureteral Obstruction
When the ureters are blocked, procedures may be needed to restore urine flow and protect the kidneys.
- Ureteral Stenting: A stent can be placed inside the ureter to keep it open and allow urine to drain from the kidney.
- Nephrostomy: A drainage tube may be placed directly into the kidney when severe obstruction requires urgent relief.
Surgical Intervention
Surgery may be necessary when obstruction persists despite medical treatment or when fibrous tissue severely surrounds the ureters.
- Ureterolysis: This procedure frees the ureters from surrounding fibrous tissue to restore normal urine flow.
- Ureteral Repositioning or Protection: Additional surgical techniques may be used to reduce the risk of the ureters becoming trapped again.
Supportive Care and Follow-Up
- Pain Management: Appropriate pain-relieving measures can help improve comfort and quality of life.
- Kidney Function Monitoring: Regular blood tests help assess whether kidney function is stable or improving.
- Follow-Up Imaging: CT, MRI, or ultrasound may be repeated to monitor the fibrous tissue and check for recurrence or renewed obstruction.
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What Are the Complications of Retroperitoneal Fibrosis?
Without timely treatment, retroperitoneal fibrosis can compress the ureters, blood vessels, and other abdominal structures, leading to serious complications.
- Hydronephrosis: Urine build-up can cause swelling and pressure inside one or both kidneys.
- Kidney Damage: Prolonged urinary obstruction can reduce kidney function and may lead to kidney failure.
- High Blood Pressure: Kidney involvement can contribute to elevated blood pressure.
- Recurrent Urinary Problems: Persistent obstruction may increase the risk of urinary infections and other complications.
- Blood Vessel Compression: Fibrous tissue may compress nearby veins or arteries and affect circulation.
Frequently Asked Questions
1. What is retroperitoneal fibrosis?
Retroperitoneal fibrosis is a rare condition in which inflammatory and fibrous tissue develops in the space behind the abdominal organs, often surrounding the aorta, ureters, and other nearby structures.
2. What are the symptoms of retroperitoneal fibrosis?
Symptoms may include persistent lower back, flank, or abdominal pain, reduced urine output, leg swelling, fatigue, loss of appetite, weight loss, and high blood pressure.
3. How is retroperitoneal fibrosis diagnosed?
Diagnosis usually involves CT scans or MRI to identify abnormal tissue in the retroperitoneum. Blood tests, kidney function tests, and sometimes a biopsy may be needed to determine the cause and rule out cancer.
4. What treatments are available for retroperitoneal fibrosis?
Treatment may include corticosteroids and other immunosuppressive medications to reduce inflammation. Ureteral stents, nephrostomy tubes, or surgery may be needed when the ureters are severely blocked.
5. What complications are associated with retroperitoneal fibrosis?
Complications may include ureteral obstruction, hydronephrosis, kidney damage, chronic kidney disease, high blood pressure, and compression of nearby blood vessels or other structures.
6. What is the triad associated with retroperitoneal fibrosis?
A commonly described clinical triad is abdominal or back pain, impaired kidney function, and elevated inflammatory markers. However, there is no single universally accepted diagnostic triad for the condition.
7. Can retroperitoneal fibrosis be cancerous?
Retroperitoneal fibrosis itself is usually noncancerous. However, some cancers can cause secondary retroperitoneal fibrosis or produce a similar appearance on imaging, so a biopsy may be required when malignancy is suspected.
8. Which drugs can cause retroperitoneal fibrosis?
Certain medications have been associated with secondary retroperitoneal fibrosis, including some ergot-derived drugs such as methysergide and ergotamine. Other medications have also been reported rarely.
