A novel SDHD mutation associated with neck paraganglioma

Area of Science:

• Genetics
• Oncology

Background:

• Familial paraganglioma is a rare hereditary condition.
• The SDHD gene plays a crucial role in tumor suppression.

Observation:

• A novel deletion mutation (c.165_169 + 14del) was identified in the SDHD gene of an index patient.
• This mutation resulted in an anomalous protein and absence of exon 2 in mRNA.
• The mutation was present in symptomatic family members and one asymptomatic individual who developed tumors.

Findings:

• The identified SDHD gene deletion (c.165_169 + 14del) is linked to familial paraganglioma.
• Genetic testing confirmed the mutation's presence in affected individuals, correlating with their clinical presentation.
• The mutation was also detected in an asymptomatic family member who subsequently developed bilateral carotid body tumors.

Implications:

• This discovery expands the known spectrum of SDHD mutations causing familial paraganglioma.
• Accurate genetic diagnosis of this mutation can aid in early detection and management of at-risk individuals.
• Understanding this novel mutation provides insights into the molecular mechanisms underlying paraganglioma development.