Body Stalk Anomalies in Pigs: Current Trends and Future Directions in Classification.

Area of Science:

• Developmental biology
• Congenital abnormalities
• Comparative pathology

Background:

• Body stalk anomaly (BSA) presents with body wall defects, skeletal abnormalities, and umbilical cord issues.
• Existing classifications often separate limb-body wall complex (LBWC) from other BSA variations.
• A need exists for a unified classification system encompassing diverse structural anomalies.

Purpose of the Study:

• To propose a novel, comprehensive classification system for body stalk anomaly (BSA).
• To integrate spinal and limb defects into BSA categorization, creating new classifications like spinal-limb-body wall complex (SPLBWC).
• To provide a framework for systematic categorization of BSA variations for improved diagnosis and research.

Main Methods:

• Development of a classification system based on wall and skeletal abnormalities observed in porcine models.
• Inclusion of combined thoracoabdominoschisis, abdominoschisis, anal atresia, genitourinary, and skeletal defects.
• Introduction of specific classifications: SPLBWC, SPBWC, STBWC, and SSBWC, excluding nonstructural anomalies.

Main Results:

• A proposed eight-type classification system for BSA based on structural defects.
• Integration of limb and spinal defects into a unified classification framework (SPLBWC).
• Establishment of additional classifications (SPBWC, STBWC, SSBWC) for nuanced categorization.

Conclusions:

• The proposed classification system offers a systematic approach to categorizing BSA variations.
• This framework enhances understanding of developmental defects and aids in clinical management.
• The system supports improved research outcomes in both veterinary and human medicine for congenital anomalies.