# Clinical characteristics and genetic mutation analysis in 18 pediatric patients with Shwachman-Diamond syndrome

## TL;DR

This study examines clinical and genetic features in 18 children with Shwachman-Diamond syndrome, highlighting diverse symptoms and new gene mutations.

## Contribution

The study identifies new SBDS gene mutations and confirms the importance of genetic testing for early diagnosis of SDS.

## Key findings

- Patients showed early onset symptoms including diarrhea, trypsin reduction, and neutropenia.
- Twenty-five percent of mutations were the hotspot 258+2T>C, while 41A>T and 185A>C were newly identified mutations.
- Clinical features included pancreatic abnormalities, bone marrow hypoplasia, and neurocognitive disorders.

## Abstract

To investigate the clinical features and genetic mutation spectrum of 18 children with Shwachman-Diamond syndrome (SDS).

Data from 18 children with SDS at Shandong University Affiliated Children’s Hospital (Ji’nan Children’s Hospital) between April 2016 and June 2024 were retrospectively analyzed. Variant sites were confirmed by Sanger sequencing in family lines.

Patients exhibited complex and diverse clinical symptoms, often involving multiple systems. The clinical features of this cohort included (1) early onset (median age: 1.5 months), diarrhea, trypsin reduction, neutropenia, and growth retardation and (2) high incidence of pancreatic imaging abnormalities, bone marrow hypoplasia, developmental malformations, and neurocognitive disorders. All patients had homozygous or compound heterozygous SBDS mutations, with 258+2T>C identified as the hotspot mutation (20/37), while 41A>T and 185A>C were newly discovered mutations.

Patients with SDS exhibit clinical heterogeneity, and this study enriches the SBDS gene mutation spectrum. Genetic testing is valuable for early diagnosis.