Embryonic liver morphology and morphometry by magnetic resonance microscopic imaging

Area of Science:

• Developmental biology
• Embryology
• Human anatomy

Background:

• Embryonic liver development is complex and influenced by surrounding structures.
• Understanding liver morphogenesis is crucial for fetal medicine and prenatal diagnosis.

Purpose of the Study:

• To analyze the external morphology and quantitative morphometry of the developing human embryonic liver.
• To correlate liver development with adjacent organogenesis and key embryonic events.

Main Methods:

• Utilized magnetic resonance imaging (MRI) data from the Kyoto Collection of Human Embryos.
• Performed detailed morphometric analysis of liver shape, volume, and axis development across Carnegie Stages (CS).

Main Results:

• Identified specific depressions and prominences on the liver surface caused by the left ventricle, stomach, umbilicus, and adrenal gland.
• Liver volume increased exponentially from CS14 to CS23, with differential growth along various axes at different developmental stages.
• Observed significant influence of adjacent organ development and embryonic events on liver morphometry.

Conclusions:

• The study provides a detailed spatiotemporal map of human embryonic liver external morphogenesis.
• These findings enhance understanding of liver development and adjacent organ interactions, offering valuable reference data for clinical applications in fetal medicine.