Noonan's syndrome with extensive verrucae.

Area of Science:

• Genetics and rare diseases
• Immunology
• Dermatology

Background:

• Noonan syndrome is a genetic disorder characterized by a distinctive facial appearance, short stature, heart defects, and developmental delays.
• Cutaneous manifestations are common in Noonan syndrome, but extensive verrucae are rarely reported.
• Intestinal lymphangiectasia can lead to protein and lymphocyte loss, potentially causing immunodeficiency.

Observation:

• A patient presented with classic Noonan syndrome features: lymphedema, hypertelorism, low-set ears, broad facies, short stature, and dental malocclusion.
• The patient also exhibited extensive verrucae planae, verrucae vulgares, and condylomata acuminata, which were unresponsive to standard treatments.
• Severe lymphedema was noted from early infancy.

Findings:

• This is the first reported association of Noonan syndrome with widespread verrucae.
• The refractory verrucae are hypothesized to be linked to an underlying immunodeficiency.
• Immunodeficiency may result from protein-losing enteropathy due to intestinal lymphangiectasia.

Implications:

• This case expands the known clinical spectrum of Noonan syndrome.
• It highlights a potential association between Noonan syndrome, immunodeficiency, and severe cutaneous viral infections.
• Further research into the immunological aspects of Noonan syndrome may reveal new therapeutic targets for associated conditions.