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Related Experiment Video

Updated: Jun 29, 2026

Murine Fetal Echocardiography

Murine Fetal Echocardiography

Published on: February 15, 2013

Anomalous costochondral cartilage in fetal anencephaly.

M Garcia-Ramirez¹, N Toran, A Carrascosa

¹Department of Pediatrics, Hospitals Vall d'Hebron, Passeig Vall'Hebron, 119-129, 08035 Barcelona, Spain.

Pediatric and Developmental Pathology : the Official Journal of the Society for Pediatric Pathology and the Paediatric Pathology Society

|April 1, 2000

Summary

Anencephaly, a condition lacking a hypothalamus, reveals abnormal cartilage development in fetuses. This study highlights altered chondrocyte organization and density, potentially explaining fetal growth retardation.

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Area of Science:

Developmental Biology
Human Fetal Development
Endocrinology

Background:

Anencephaly is a severe congenital malformation characterized by the absence of the brain and calvarium.
The lack of a hypothalamus in anencephalic fetuses offers a unique model to study human development without hypothalamic influence.
Hypothalamic hormones are crucial for regulating growth and development, including skeletal formation.

Purpose of the Study:

To investigate the impact of hypothalamic insufficiency on cartilage development in anencephalic fetuses.
To analyze the organization and cellular characteristics of costochondral cartilage in anencephalic versus control fetuses.

Main Methods:

Costochondral cartilage sections were obtained from eight anencephalic fetuses and seven age-matched controls.
Histological analysis focused on the proliferative and maturing zones of the cartilage.
Quantitative measurements included zonal length, cell density, and cellular organization.

Main Results:

Anencephalic fetuses exhibited anomalous cartilage organization compared to controls.
A significant increase in proliferative chondrocyte zonal length and a decrease in the maturing zone were observed in anencephalic cases.
Reduced cell density in both proliferating and maturing zones was noted in anencephalic fetuses, suggesting impaired cartilage growth.

Conclusions:

Hypothalamic insufficiency in anencephaly leads to significant alterations in fetal cartilage development.
These cartilage abnormalities may contribute to the growth retardation observed in anencephalic fetuses.
The findings suggest modifications in pituitary hormones and growth factors due to reduced hypothalamopituitary function.