# Kidneys in Children with Tuberous Sclerosis Complex—An Up-to-Date Review

## TL;DR

This review discusses kidney-related issues in children with tuberous sclerosis complex and highlights the importance of imaging and multidisciplinary care.

## Contribution

The paper provides an up-to-date review of imaging techniques and management strategies for renal lesions in children with TSC.

## Key findings

- Ultrasound is typically used for initial diagnosis, while MRI is preferred for long-term monitoring.
- mTOR inhibitors are effective in reducing tumor size in TSC patients.
- A multidisciplinary approach improves treatment outcomes for children with TSC.

## Abstract

Background: Tuberous sclerosis complex (TSC) is a rare genetic disorder characterized by the growth of benign tumors in various organ systems, with particularly significant effects on the kidneys. Renal manifestations of TSC include angiomyolipomas (AMLs), renal cysts, and a higher risk of renal cell carcinoma (RCC). Nephrological monitoring is crucial for the early detection of kidney changes, the management of hypertension, and the assessment of the risk of developing chronic kidney disease. Ultrasound is typically the initial imaging choice for diagnosis and monitoring, with magnetic resonance imaging (MRI) being a preferred imaging modality for long-term surveillance. Patients with TSC have an increased risk of arterial hypertension, renal artery stenosis, and urolithiasis. In some patients, the co-occurrence of TSC and autosomal dominant polycystic kidney disease (ADPKD) is caused by the TSC2/PKD1 contiguous gene syndrome (CGS). The primary medical treatment for TSC is a mammalian target of rapamycin kinase inhibitors (mTOR), as they effectively shrink tumors, often reducing or eliminating the need for surgical intervention. Methods: This article aims to review the most recent literature on the diagnosis and management of renal lesions in tuberous sclerosis complex (TSC), with a particular focus on the role of various imaging techniques. Conclusions: Given the multifactorial nature of this disease, this review emphasizes the importance of a multidisciplinary approach, including various imaging methods, to improve the care and treatment outcomes of children with tuberous sclerosis complex.