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What does dilated extrarenal pelvis mean?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hi doctor,

In my kidney ultrasound, my left kidney shows mild dilatation of calyces with dilated extrarenal pelvis of approximately 39 mm. What does it mean?
Answered by Dr. Srivastava Sumit

Education:

MBBS

Professional Bio:

Dr. Sumit Srivastava is a skilled General Practitioner and Family Physician with extensive clinical experience. He is also an expert in Internal Medicine, dedicated to providing comprehensive healthcare for individuals and families. Known for his patient-focused approach, he ensures quality care and long-term wellness. His expertise includes managing lifestyle disorders, chronic illnesses, and preventive healthcare, with a strong emphasis on accurate diagnosis and holistic treatment.

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Hi,

Welcome to icliniq.com.

  • The calyceal pelvic system dilatation of kidney could be due to one of the following reasons:
    • Congenital.
    • Focal infection of or at calyx or extrarenal pelvis of kidney.
    • Stricture - narrowing of the neck of calyx or extrarenal pelvis.
    • Stone impacted at the neck of extrarenal pelvis.

Extrarenal pelvis stone may cause obstruction to drainage of urine from the calyx into renal pelvis resulting in accumulation of urine in calyx and extrarenal pelvis causing dilatation which might lead to possibility of obstruction to excretion of urine.

For further information consult a nephrologist online.

Patient's Query

Hi doctor,

What is extrarenal pelvis? Please explain me in detail.

Answered by Dr. Srivastava Sumit

Education:

MBBS

Professional Bio:

Dr. Sumit Srivastava is a skilled General Practitioner and Family Physician with extensive clinical experience. He is also an expert in Internal Medicine, dedicated to providing comprehensive healthcare for individuals and families. Known for his patient-focused approach, he ensures quality care and long-term wellness. His expertise includes managing lifestyle disorders, chronic illnesses, and preventive healthcare, with a strong emphasis on accurate diagnosis and holistic treatment.

This doctor is not available for online consultations on the platform anymore.

Consult other doctors in the same speciality

Hi,

Welcome back to icliniq.com.

  • Most part of the pelvis is inside kidney and called renal pelvis. Some part of the pelvis stays outside the kidney called extrarenal pelvis.
  • Extrarenal pelvis is normal for persons with large pelvis. An extrarenal pelvis usually appears dilated on ultrasound giving a false indication of an obstructive pathology.
  • In some persons it may cause urinary tract infection, but chances are very less. So, please do not worry. It is a normal finding if not associated with any symptom.

For further information consult a nephrologist online.

Medically reviewed by iCliniq medical review team
Published At March 30, 2017
Reviewed At April 12, 2025

Education:

MBBS

Professional Bio:

Dr. Sumit Srivastava is a skilled General Practitioner and Family Physician with extensive clinical experience. He is also an expert in Internal Medicine, dedicated to providing comprehensive healthcare for individuals and families. Known for his patient-focused approach, he ensures quality care and long-term wellness. His expertise includes managing lifestyle disorders, chronic illnesses, and preventive healthcare, with a strong emphasis on accurate diagnosis and holistic treatment.

This doctor is not available for online consultations on the platform anymore.

Consult other doctors in the same speciality

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Companion

Dilated Extrarenal Pelvis Companion

How it works

Your kidney ultrasound showed a dilated extrarenal pelvis. Here's what that means and what factors might be involved.

1

Dilated
Extrarenal

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Possible
Causes

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Pelvis
Anatomy

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Always
Problem

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Urinary
Tract

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When to
Consult

This information is based on general medical guidance. It is not a substitute for professional medical advice; consult a qualified clinician.

Always consult a doctor before taking medication; self-medication carries serious health risks. Take exact prescribed doses, and never start, change, or stop treatment without medical supervision.
Dr. Srivastava Sumit
Dr. Srivastava Sumit

Internal Medicine

Consult this doctor

Education:

MBBS

Professional Bio:

Dr. Sumit Srivastava is a skilled General Practitioner and Family Physician with extensive clinical experience. He is also an expert in Internal Medicine, dedicated to providing comprehensive healthcare for individuals and families. Known for his patient-focused approach, he ensures quality care and long-term wellness. His expertise includes managing lifestyle disorders, chronic illnesses, and preventive healthcare, with a strong emphasis on accurate diagnosis and holistic treatment.

This doctor is not available for online consultations on the platform anymore.

Consult other doctors in the same speciality
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