Leonardo da Vinci meets celiac disease.

Area of Science:

• Medical research
• Gastroenterology
• Human anatomy

Background:

• Facial symmetry analysis, particularly the trichion-nasion (tn) to nasion-subnasal (ns) ratio, has been proposed as a potential indicator for celiac disease (CD).
• Previous studies suggest adults with CD may present with a proportionally larger forehead (superior facial third) compared to the middle facial third.

Purpose of the Study:

• To investigate the correlation between facial asymmetry, specifically forehead length and the tn/ns ratio, and celiac disease in both children and adults.
• To determine if facial measurements can serve as a diagnostic or screening tool for CD.

Main Methods:

• A study involving 126 biopsy-proven celiac disease patients (76 children, 50 adults) and 102 healthy controls (43 children, 59 adults).
• Facial photographs were analyzed using specialized software to measure craniofacial segments, including trichion-nasion (tn) length and the tn/ns ratio.

Main Results:

• Adult celiac patients demonstrated a significantly greater tn length (mean 7.43 cm) compared to adult controls (mean 6.38 cm; P = 0.001).
• A tn length cutoff of 6.5 cm showed 86% sensitivity but only 54.2% specificity in identifying adult celiac disease.
• No significant difference in the tn/ns ratio was found between adult celiac patients and controls. Neither facial measurement correlated with gluten exposure duration in celiac patients.

Conclusions:

• Adults with celiac disease exhibit a significantly larger forehead extension than healthy adults.
• This facial asymmetry finding was not observed in children with celiac disease.
• The low specificity of forehead extension measurement limits its utility as a screening tool for celiac disease.