The proboscis in human cyclopia: an anatomical study in two dimensions

Area of Science:

• Human Anatomy
• Developmental Biology
• Teratology

Background:

• Human cyclopia is a rare congenital disorder characterized by a single midline eye.
• The proboscis, a midline facial appendage, is a common feature in cyclopia.
• Understanding the anatomical structures of the cyclops proboscis offers insights into facial development.

Purpose of the Study:

• To conduct a 2-dimensional anatomical study of the human cyclops proboscis.
• To determine the proboscis's contribution to the roof of the median orbit.
• To explore the proboscis as a model for normal facial development.

Main Methods:

• Analysis of 4 sectioned fetal heads exhibiting cyclopia.
• Examination of a dried cyclops skull.
• 2-dimensional anatomical dissection and histological assessment.

Main Results:

• The proboscis skeleton is derived from the nasal capsule.
• The proboscis base occupies the anterior cranial fossa floor and contributes to the median orbit's roof.
• The proboscis cavity contains squamous epithelium, respiratory, and olfactory mucosa, with olfactory fibers extending into the ethmoidal notch.

Conclusions:

• The proboscis represents the anterosuperior portion of the nasal cavity in the absence of median facial components.
• The cyclops face provides a valuable model for studying normal facial development.
• Further research into cyclopia anatomy can elucidate complex embryological processes.