Related Experiment Video
Updated: Aug 24, 2026

Transmesenteric Laparoscopic Pyeloplasty in Trendelenburg Position for Horseshoe Kidney with Hydronephrosis
Published on: July 8, 2025
[Severe bilateral hydronephrosis in a 12 years old boy with neurofibromatosis type-1]
Anna Sitkiewicz1, Przemysław Przewratil, Ewa Andrzejewska
1Klinika Chirurgii i Onkologii Dzieciecej Instytutu Pediatrii Akademii Medycznej w Łodzi.
Insights
Neurofibromatosis type 1 can cause large abdominal tumors in children. This case highlights delayed treatment complications, including kidney destruction and the need for ongoing ureterostomy management.
Area of Science:
- Pediatric Oncology
- Clinical Case Study
- Genetics
Background:
- Neurofibromatosis type 1 (NF1) is associated with significant tumor burden, particularly in pediatric patients.
- Large neurofibromas in the head, neck, and abdomen present complex clinical challenges.
- Early diagnosis and management are crucial for improving outcomes in NF1 patients.
Observation:
- A 12-year-old boy with NF1 presented with a benign abdominal tumor originating from nerve roots (S1-S2).
- Initial tumor resection was incomplete, and adjuvant therapies (chemotherapy, hormonotherapy) proved ineffective.
- A two-year lapse in treatment due to non-compliance led to severe obstructive uropathy and left kidney destruction.
Findings:
- Bilateral ureterocutaneostomies were performed to manage the obstructive uropathy.
- Despite slow tumor growth, the patient remains clinically stable but requires ongoing monitoring.
- Progressive contraction of the right ureterocutaneostomy necessitates regular calibrations.
Implications:
- This case underscores the critical importance of consistent treatment adherence in pediatric NF1.
- Delayed intervention for NF1-associated tumors can lead to severe, irreversible complications like kidney failure.
- Long-term management strategies for NF1 patients with complex abdominal tumors and urinary tract complications require further investigation.
Abstract:
The large neurofibromatic tumours developing in head, neck and abdominal cavity in children with neurofibromatosis type 1 make a serious clinical problem. In this report the case of 12 years old boy with benign abdominal tumor leading from nerve roots (S1-S2) is presented. He has been treated for 6 years. The other malignant neoplasms, additional congenital defects or neurological dysfunctions were not confirmed. The primary resection was not radical and adjuvant therapy (chemotherapy, hormonotherapy) was ineffective. Due to the progression and not coming to hospital in next 2 years severe obstructive uropathy developed leading to complete destruction of the left kidney. Bilateral ureterocutaneostomies were performed. Despite of slow tumor grow the patient is stable now. However he needs regular calibrations of the right ureterocutaneostomy due to the progressive contraction. Further treatment of this case remains open question.
