[Clinical screening and genetic diagnosis for Prader-Willi syndrome]

Area of Science:

• Genetics
• Pediatrics
• Clinical Diagnostics

Background:

• Prader-Willi syndrome (PWS) is a complex genetic disorder.
• Early and accurate diagnosis is essential for timely intervention and management.
• Clinical screening tools are used to identify children requiring further genetic testing.

Purpose of the Study:

• To evaluate the effectiveness of clinical screening for Prader-Willi syndrome (PWS) in children.
• To assess the utility of genetic testing in diagnosing PWS.
• To analyze the performance of clinical diagnostic criteria in confirmed PWS cases.

Main Methods:

• A cohort of 94 children with suspected Prader-Willi syndrome (PWS) was studied.
• Methylation-specific multiplex ligation-dependent probe amplification (MS-MLPA) was employed for genetic confirmation.
• Clinical diagnostic scores and perinatal characteristics were analyzed for confirmed PWS cases.

Main Results:

• Methylation-specific multiplex ligation-dependent probe amplification (MS-MLPA) confirmed Prader-Willi syndrome (PWS) in 11 out of 94 children (12% detection rate).
• Only 45% of confirmed PWS cases met the established clinical diagnostic criteria.
• Common perinatal features included decreased fetal movement, hypotonia, feeding difficulties, and weak crying.

Conclusions:

• Genetic testing is recommended for early diagnosis in children suspected of Prader-Willi syndrome (PWS).
• Clinical diagnostic criteria alone may be insufficient for identifying all PWS cases.
• Prompt genetic analysis is vital to avoid diagnostic delays.