Objective
To discover the possible factor of the iatrogenic fibroepithelial polyps (FEPs).
Materials and Methods
A retrospective chart review of 28 pediatric patients who have undergone pyeloplasties
for ureteropelvic junction obstruction with pathologically proven FEPs was performed
from January 2009 to June 2016 at our hospital. Among them, 6 patients without apparent
FEPs at the time of the first pyeloplasty were found to have FEPs at the time of reoperation.
The medical history and clinical, diagnostic, intraoperative, pathologic, and follow-up
data of the 6 patients were reviewed.
Results
All iatrogenic FEPs were located proximal to the anastomotic stoma. On pathological
examination, the size of the FEPs ranged from 1.5 to 3.5 cm. The FEPs were pink, grayish-white,
or tan-gray in color and cauliflower-like in shape. Microscopically, they arose from
the submucosa and consisted of a layer of normal transitional epithelium covering
a fibrovascular stromal core showing sparse vascularity and prominent edema. The mean
follow-up period was 47 months (range, 4-82 months). All patients' symptoms disappeared
and the function of the affected kidney was preserved after the second pyeloplasty.
No patients developed FEP recurrence.
Conclusion
Nephrostomy may associate with iatrogenic FEPs in young children. Iatrogenic FEPs
are a specific type of polyp that grows rapidly within a very short time. Pathologically,
iatrogenic FEPs are the same as other types of FEPs.
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Article info
Publication history
Published online: February 13, 2017
Accepted:
February 5,
2017
Received:
December 9,
2016
Footnotes
Financial Disclosure: The authors declare that they have no relevant financial interests.
Identification
Copyright
© 2017 Elsevier Inc. All rights reserved.
