Genetic
1960 — Klaus Patau's published cytogenetic findings, University of Wisconsin (though clinical observations of similar presentations appear in early modern European teratological literature from the 16th century onward)
Patau syndrome was a chromosomal condition arising from the presence of an extra copy of the thirteenth chromosome, a discovery that came only in the mid-twentieth century when cytogenetic techniques advanced far enough to allow detailed examination of the human karyotype. Before that era, infants born with the cluster of physical characteristics later associated with the syndrome had been observed and recorded by physicians, but no unifying biological explanation existed to account for the pattern of features. The condition was named after Klaus Patau, the geneticist who led the team that first identified the underlying trisomy in 1960.
Historical Narrative
The history of Patau syndrome as a named and chromosomally defined entity was remarkably brief, beginning only in the second half of the twentieth century, yet the condition itself had been witnessed by physicians and midwives across many centuries without any framework to explain the clustering of physical traits observed in affected newborns. Historical accounts of infants born with unusual anatomical features, including those resembling what would later be described in Patau syndrome, appeared in early modern European medical literature primarily in the genre of teratology, the study of monstrous births, a term that carried no moral judgment in its original Latin usage but simply denoted deviation from expected form.
Ancient and medieval explanations for severe congenital anomalies drew heavily on theories of maternal imagination, astrological influences, divine punishment, or the mingling of human and animal vital spirits during conception. Aldrovandi, the sixteenth-century Italian naturalist, and Ambroise Paré, the celebrated French surgeon of the same era, compiled extensive catalogs of anomalous births and proposed frameworks that included both naturalistic and supernatural causation. Neither they nor their contemporaries possessed any concept of hereditary material or chromosomal mechanics, and their explanatory systems, while intellectually serious for their time, bore no resemblance to what would eventually be understood as the chromosomal basis of such conditions.
The nineteenth century brought a shift toward more systematic clinical description of congenital syndromes, driven in part by the growth of institutional medicine and the careful bedside observation championed by figures such as Thomas Willis and later the Paris Clinical School. Physicians began documenting recurring patterns of physical anomalies in newborns and infants, gradually building descriptive categories even in the absence of causal explanation. The conceptual tools available, however, remained limited to anatomy, histology, and the nascent theories of heredity emerging from the work of Gregor Mendel, whose 1865 pea plant experiments were rediscovered only at the turn of the twentieth century.
The decisive transformation in understanding congenital syndromes of this type came through cytogenetics. In 1956, Joe Hin Tjio and Albert Levan established that the correct number of human chromosomes was 46, correcting a longstanding error and providing a new baseline against which anomalies could be measured. Then in 1959, Jérôme Lejeune and his colleagues demonstrated that Down syndrome was caused by trisomy of the twenty-first chromosome, the first direct proof that a recognizable human syndrome could arise from a chromosomal error. This discovery created the conceptual and methodological foundation for rapid subsequent work.
In 1960, Klaus Patau, Eeva Therman, and their collaborators at the University of Wisconsin published their identification of trisomy 13 as the chromosomal basis for a recognizable pattern of severe congenital anomalies, giving the condition its cytogenetic identity for the first time. The discovery arrived almost simultaneously with John Edwards's identification of trisomy 18, and the two findings together demonstrated that multiple distinct patterns of severe congenital anomaly had their origins in chromosomal duplication. The naming of the syndrome after Patau reflected the conventional medical practice of the era, though subsequent decades of medical history scholarship noted that bedside physicians had been encountering and recording these infants for generations before any chromosomal explanation was possible.
Key Historical Figures
Historical narrative only — this page describes how Patau syndrome was understood historically. It is not medical advice and does not describe current diagnosis or treatment. Sourced from verified medical history references (NIH, Encyclopaedia Britannica, and standard medical history texts). See our medical disclaimer.