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Robotic Duodenal Sleeve Resection for Gastrointestinal Stromal Tumor with Rare Exon 8 KIT Mutation Following Neoadjuvant Imatinib

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[Kelley-Seegmiller syndrome].

J Brunner¹, D Lotschütz

¹Department für Kinderheilkunde, Medizinische Universität Innsbruck, Austria. juergen.brunner@uklibk.ac.at

Klinische Padiatrie

|August 10, 2007

Summary

Kelley-Seegmiller syndrome, a partial hypoxanthine-guanine phosphoribosyltransferase (HPRT) deficiency, can cause relapsing kidney problems. Early diagnosis is key for managing this purine metabolism disorder.

Area of Science:

Genetics and Metabolic Disorders
X-linked inherited diseases
Purine metabolism

Background:

Hypoxanthine-guanine phosphoribosyltransferase (HPRT) deficiency presents as Lesch-Nyhan syndrome (complete deficiency) or Kelley-Seegmiller syndrome (partial deficiency).
Lesch-Nyhan syndrome is characterized by severe neurological and renal symptoms.
Kelley-Seegmiller syndrome involves partial HPRT deficiency, leading to distinct clinical manifestations.

Observation:

A 13-year-old boy presented with recurrent hyperuricemia and hypercreatininemia.
The patient experienced postoperative renal insufficiency.
The diagnostic workup led to the identification of Kelley-Seegmiller syndrome.

Findings:

Kelley-Seegmiller syndrome is associated with increased de novo purine synthesis, resulting in uric acid overproduction.

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Urolithiasis (kidney stones) is a common clinical manifestation.

Approximately 25% of patients may exhibit mild neurological symptoms, but not self-destructive behavior.

Implications:

Relapsing urolithiasis and renal insufficiency warrant thorough investigation, including consideration of purine metabolism disorders.
Early diagnosis of Kelley-Seegmiller syndrome is crucial for appropriate management and preventing complications.
Understanding the pathophysiology aids in developing targeted therapeutic strategies for HPRT deficiency.