"This occurrence of short limbs with polydactylism seems to prove conclusively that the condition may be due to a modification of development of a totally different nature from rickets. It is probable that the infant was not at full term. Among the points which the author has noticed in his description are that the fontanelle was double its usual size; that the orbits were somewhat deformed; that the two halves of the lower jaw were already united; and that the ribs were short and badly formed. He also, of course, draws attention to the shortness of the limbs, the stoutness of the long bones, and the supernumerary digits. Ifind no statement that the skeleton was deposited in any museum, but it is very possible that it is still in existence in Amsterdam, and if so it is very desirable that it should be more exactly described,"In Figure 126, A represents division of thumb after Guyot-Daubes, shows a typical case of supernumerary fingers, and C pictures Morand's case of duplication of several toes.
Forster gives a sketch of a hand with nine fingers and a foot with nine toes. Voight records an instance of 13 fingers on each hand and 12 toes on each foot. Saviard saw an infant at the Hotel-Dieu in Paris in 1687 which had 40 digits, ten on each member. Annandale relates the history of a woman who had six fingers and two thumbs on each hand, and another who had eight toes on one foot.
Meckel tells of a case in which a man had 12 fingers and 12 toes, all well formed, and whose children and grandchildren inherited the deformity. Mason has seen nine toes on the left foot. There is recorded the account of a child who had 12 toes and six fingers on each hand, one fractured. Braid describes talipes varus in a child of a few months who had ten toes. There is also on record a collection of cases of from seven to ten fingers on each hand and from seven to ten toes on each foot. Scherer gives an illustration of a female infant, otherwise normally formed, with seven fingers on each hand, all united and bearing claw-like nails. On each foot there was a double halux and five other digits, some of which were webbed.
The influence of heredity on this anomaly is well demonstrated.
Reaumur was one of the first to prove this, as shown by the Kelleia family of Malta, and there have been many corroboratory instances reported; it is shown to last for three, four, and even five generations; intermarriage with normal persons finally eradicates it.
It is particularly in places where consanguineous marriages are prevalent that supernumerary digits persist in a family. The family of Foldi in the tribe of Hyabites living in Arabia are very numerous and confine their marriages to their tribe. They all have 24 digits, and infants born with the normal number are sacrificed as being the offspring of adultery. The inhabitants of the village of Eycaux in France, at the end of the last century, had nearly all supernumerary digits either on the hands or feet.
Being isolated in an inaccessible and mountainous region, they had for many years intermarried and thus perpetuated the anomaly.
Communication being opened, they emigrated or married strangers and the sexdigitism vanished. Maupertuis recalls the history of a family living in Berlin whose members had 24 digits for many generations. One of them being presented with a normal infant refused to acknowledge it. There is an instance in the Western United States in which supernumerary digits have lasted through five generations. Cameron speaks of two children in the same family who were polydactylic, though not having the same number of supernumerary fingers.
Smith and Norwell report the case of a boy of fifteen both of whose hands showed webbing of the middle and ring fingers and accessory nodules of bone between the metacarpals, and six toes on each foot. The boy's father showed similar malformations, and in five generations 21 out of 28 individuals were thus malformed, ten females and 11 males. The deformity was especially transmitted in the female line.
Instances of supernumerary thumbs are cited by Panaroli, Ephemerides, Munconys, as well as in numerous journals since.
This anomaly is not confined to man alone; apes, dogs, and other lower animals possess it. Bucephalus, the celebrated horse of Alexander, and the horse of Caesar were said to have been cloven-hoofed.
Hypertrophy of the digits is the result of many different processes, and true hypertrophy or gigantism must be differentiated from acromegaly, elephantiasis, leontiasis, and arthritis deformans, for which distinction the reader is referred to an article by Park. Park also calls attention to the difference between acquired gigantism, particularly of the finger and toes, and another condition of congenital gigantism, in which either after or before birth there is a relatively disproportionate, sometimes enormous, overgrowth of perhaps one finger or two, perhaps of a limited portion of a hand or foot, or possibly of a part of one of the limbs. The best collection of this kind of specimens is in the College of Surgeons in London.
Curling quotes a most peculiar instance of hypertrophy of the fingers in a sickly girl. The middle and ring fingers of the right hand were of unusual size, the middle finger measuring 51/2 inches in length four inches in circumference. On the left hand the thumb and middle fingers were hypertrophied and the index finger was as long as the middle one of the right hand. The middle finger had a lateral curvature outward, due to a displacement of the extensor tendon. This affection resembled acromegaly. Curling cites similar cases, one in a Spanish gentleman, Governor of Luzon, in the Philippine Islands, in 1850, who had an extraordinary middle finger, which he concealed by carrying it in the breast of his coat.
