Supernumerary kidney

Last revised by Fabio Macori ◉ on 27 Feb 2022

Citation, DOI, disclosures and article data

Citation:

Skandhan A, Macori F, Niknejad M, et al. Supernumerary kidney. Reference article, Radiopaedia.org (Accessed on 30 Sep 2023) https://doi.org/10.53347/rID-25303

DOI:

https://doi.org/10.53347/rID-25303

Permalink:

https://radiopaedia.org/articles/25303

rID:

25303

Article created:

18 Oct 2013, Avni K P Skandhan ◉

Disclosures:

At the time the article was created Avni K P Skandhan had no recorded disclosures.

View Avni K P Skandhan's current disclosures

Last revised:

27 Feb 2022, Fabio Macori ◉

Disclosures:

At the time the article was last revised Fabio Macori had no recorded disclosures.

View Fabio Macori's current disclosures

Revisions:

14 times, by 7 contributors - see full revision history and disclosures

Systems:

Urogenital

Sections:

Anatomy

Tags:

kidney, renal, variant, anatomy, cases

Synonyms:

Supernumerary kidney
Accessory kidney
Supernumerary kidneys
Accessory kidneys

Supernumerary kidneys, also known as accessory kidneys, are a rare congenital anomaly of the urogenital system, where there are one or two additional kidneys.

Most of the supernumerary kidneys are on the left and usually caudal to the native kidney. Mostly the accessory kidney is smaller in size with reduced excretion. The evaluation may be done by ultrasound, IVU, CT, MRI and nuclear medicine studies like DMSA and DTPA scans. Ultrasound is useful in morphological characterization whilst the rest may aid in the functional assessment too.

Treatment and prognosis

Management is symptom-based. For asymptomatic patients, regular ultrasound follow-ups and USG with excretory function assessment is suggested if the patient is symptomatic.