The challenge of CDG diagnosis

Area of Science:

• Biochemistry
• Genetics
• Pediatrics

Background:

• Congenital disorders of glycosylation (CDG) encompass over 130 genetic conditions.
• Diagnosis is challenging due to the large number of types and clinical heterogeneity.
• The standard screening test for CDG is often insufficient, missing many cases.

Purpose of the Study:

• To provide practical diagnostic tools for Congenital disorders of glycosylation (CDG).
• To simplify the diagnostic process for healthcare professionals.
• To raise awareness and improve the timeliness of CDG diagnosis.

Main Methods:

• Compilation of clinical features suggestive of specific CDG types.
• Creation of tables detailing clinical, biochemical, and laboratory findings by organ system.
• Development of a diagnostic decision tree for suspected CDG cases.
• Review of current biochemical and genetic testing options.

Main Results:

• A comprehensive list of clinical and biochemical hallmarks for various CDG.
• An updated overview of identified CDG types and affected systems.
• Practical diagnostic aids including suggestive features, organ-specific findings, and a decision tree.

Conclusions:

• A CDG diagnosis should be considered in unexplained syndromes, especially with neurological involvement.
• The provided tools aim to streamline CDG diagnosis for healthcare providers.
• Enhanced diagnostic strategies are crucial for effective and prompt management of CDG patients.