Junctional parenchymal defect of kidney
Last revised by Mateusz Wilczek
on 4 Dec 2023
Citation, DOI, disclosures and article data
Citation:
Jha P, Wilczek M, Murphy A, et al. Junctional parenchymal defect of kidney. Reference article, Radiopaedia.org (Accessed on 14 Dec 2024) https://doi.org/10.53347/rID-16286
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rID:
16286
Article created:
7 Jan 2012,
Praveen Jha
Disclosures:
At the time the article was created Praveen Jha had no recorded disclosures.
View Praveen Jha's current disclosures
Last revised:
4 Dec 2023,
Mateusz Wilczek
Disclosures:
At the time the article was last revised Mateusz Wilczek had no financial relationships to ineligible companies to disclose.
View Mateusz Wilczek's current disclosures
Revisions:
11 times, by
8 contributors -
see full revision history and disclosures
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Synonyms:
- Renal junctional parenchymal defect
- Renal junctional parenchymal defects
- Junctional parenchymal defect of kidneys
- Junctional parenchymal defect of the kidney
- Junctional cleft of kidney
Junctional parenchymal defects in renal imaging are a normal variant, which results from the incomplete embryonic fusion of renunculi.
Radiographic features
Ultrasound
It can be seen as a triangular echogenic cortical defect, frequently seen in upper lobe parenchyma. The defect is the extension of sinus fat into the cortex, usually at the border of the upper pole and interpolar region of the kidney.
Differential diagnosis
General imaging considerations include:
renal angiomyolipoma (usually more round)
persistent fetal lobulation of the kidneys (also resulting from incomplete fusion of renal lobules)
References
- 1. Carter AR, Horgan JG, Jennings TA et-al. The junctional parenchymal defect: a sonographic variant of renal anatomy. Radiology. 1985;154 (2): 499-502. Radiology (link) - Pubmed citation
- 2. Hélénon O, Merran S, Paraf F et-al. Unusual fat-containing tumors of the kidney: a diagnostic dilemma. Radiographics. 1997;17 (1): 129-44. doi:10.1148/radiographics.17.1.9017804 - Pubmed citation
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