Abstract

The aim of this study was to evaluate the safety and efficacy of low-dose everolimus treatment in patients with tuberous sclerosis complex (TSC)-associated angiomyolipoma (AML) with renal dysfunction or low body weight. We investigated a total of 50 adult patients underwent everolimus treatment for AML associated with TSC. For patients with renal dysfunction (serum creatinine level ≥ 1.5mg/dl) or low body weight (body weight < 35kg), 5mg of everolimus was administered daily (low-dose group). For patients without renal dysfunction or low body weight, 10mg of everolimus was administered daily (conventional-dose group). The treatment effects and adverse events were compared between the two groups. There were 20 patients in the low-dose group, and 30 in the conventional-dose group. The average reduction rate of the AML volume in the low-dose group was 52%, whereas it was 60% in the conventional-dose group. No significant differences were found in the average reduction rate between the groups (P = 0.24). The average blood everolimus trough levels were 7.7 ± 3.1ng/mL in the low-dose group and 12.2 ± 5.7ng/mL in the conventional-dose group. The level was significantly higher in the conventional-dose group than in the low-dose group (P = 0.004). The incidences of stomatitis and irregular menstruation were significantly lower in the low-dose group than in the conventional-dose group (P = 0.009, P = 0.045, respectively). The present study demonstrates that low-dose everolimus treatment is safe and effective for TSC-associated AML. This treatment was well tolerated and adverse events were mild in all cases.

Highlights

  • Tuberous sclerosis complex (TSC) is a rare disease, with an autosomal dominant mode of inheritance, that results in systemic hamartoma

  • This treatment was well tolerated and adverse events were mild in all cases

  • Tuberous sclerosis complex (TSC) is a systemic disease with an autosomal dominant mode of inheritance, in which hamartomas form throughout the body, leading to the development of various organ disorders[1]

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Summary

Introduction

Tuberous sclerosis complex (TSC) is a rare disease, with an autosomal dominant mode of inheritance, that results in systemic hamartoma. Renal angiomyolipoma (AML) is observed in 50-80% of TSC patients. Everolimus is recommended as an initial treatment for TSC-associated AML; few studies have investigated the efficacy and safety of low-dose everolimus therapy. We evaluated the safety and efficacy of low-dose everolimus treatment in patients with TSC-associated AML with renal dysfunction or low body weight. Tuberous sclerosis complex (TSC) is a systemic disease with an autosomal dominant mode of inheritance, in which hamartomas form throughout the body, leading to the development of various organ disorders[1]. AML is the most frequent benign renal tumor and is observed in 50%-80% of TSC patients[4]. When the tumor size is ≥4 cm, the growing speed is fast, and the incidence of hemorrhaging and hematuria increases[5]

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