Monosomia
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
This article from the 1928-1936 Great Medical Encyclopedia describes monosomia as a type of double malformation involving conjoined monozygotic twins. It details anatomical configurations such as a single shared body with separate heads or varied fusions of the head and upper torso.
Encyclopedia entry (1928–1936)
MONOSOMIA, a type of double malformation where fused monozygotic twins have one common body and separate heads on a common neck with a common atlas (atlodyme according to the terminology of Geoffroy Saint-Hilaire), or the heads are joined posteriorly in the occipital region (iniodyme), or with one common head there are two faces (opodyme—see Diprosopus). MONOCEPHALY (monocephalus), a type of double malformation where fused monozygotic twins have a common head and upper torso (for example, cephalothoracopagus); this also includes the main mass of cases of double malformations designated as duplicitas posterior.
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Cite this page
“Monosomia.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.com/article/monosomy/