Acalvaria in historical records

Area of Science:

• Medical History
• Developmental Biology
• Teratology

Background:

• Acalvaria is a rare cranial vault defect characterized by the absence of cranial bones and dura mater, with intact brain and cranial base.
• Often mistaken for other conditions like Anencephaly, Acalvaria is typically considered a perinatal lethal malformation, though survival cases exist.
• Its rarity necessitates investigation into historical records for documented instances.

Purpose of the Study:

• To investigate the presence of Acalvaria in historical records.
• To differentiate Acalvaria from similar congenital malformations described in historical and medical literature.

Main Methods:

• Historical-critical method applied to written sources and material culture from Antiquity to the 19th century.
• Focus on Dutch- and German-speaking regions, examining texts and illustrations.
• Analysis of collections, pamphlets, and the emergence of Teratology classification systems.

Main Results:

• Ancient authors did not explicitly describe Acalvaria, despite their interest in stillbirths and skull development.
• Poor preservation of ancient archaeological finds hinders identification of potential Acalvaria cases.
• Early Modern Period records show illustrations of related malformations, with Teratology introducing numerous classification terms.

Conclusions:

• Presented historical cases may align with the definition of Acalvaria.
• Certain diagnosis of Acalvaria is practically impossible based solely on historical descriptions and drawings without autopsy evidence.