Much more rarely, duplication of the heart,
lungs, stomach, and kidneys has been noted, and the lower limbs
may be shorter than normal.
CLASS XI.--Cases of fetus in fetu, those strange instances in
which one might almost say that a man may be pregnant with his
brother or sister, or in which an infant may carry its twin
without the fact being apparent, will next be discussed. The
older cases were cited as being only a repetition of the process
by which Eve was born of Adam. Figure 63 represents an old
engraving showing the birth of Eve. Bartholinus, the Ephemerides,
Otto, Paullini, Schurig, and Plot speak of instances of fetus in
fetu. Ruysch describes a tumor contained in the abdomen of a man
which was composed of hair, molar teeth, and other evidences of a
fetus. Huxham reported to the Royal Society in 1748 the history
of a child which was born with a tumor near the anus larger than
the whole body of the child; this tumor contained rudiments of an
embryo. Young speaks of a fetus which lay encysted between the
laminae of the transverse mesocolon, and Highmore published a
report of a fetus in a cyst communicating with the duodenum.
Dupuytren gives an example in a boy of thirteen, in whom was
found a fetus.
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