There is a rare and curious condition known as "deciduous skin"or keratolysis, in which the owners possess a skin, which, like that of a serpent, is periodically cast off, that of the limbs coming off like the finger of a glove. Preston of Canterbury, New Zealand, mentions the case of a woman who had thus shed her skin every few weeks from the age of seven or even earlier. The woman was sixty-seven years of age; the skin in every part of the body came away in casts and cuticles which separated entire and sometimes in one unbroken piece like a glove or stocking. Before each paroxysm she had an associate symptom of malaise. Even the skin of the nose and ears came off complete. None of the patient's large family showed this idiosyncrasy, and she said that she had been told by a medical man that it had been due to catching cold after an attack of small-pox. Frank mentions a case in which there was periodic and complete shedding of the cuticle and nails of the hands and feet, which was repeated for thirty-three consecutive years on July 24th of each year, and between the hours of 3 P.M. and 9 P.M. The patient remembered shedding for the first time while a child at play. The paroxysms always commenced abruptly, constitutional febrile symptoms were first experienced, and the skin became dry and hot. The acute symptoms subsided in three or four hours and were entirely gone in twelve hours, with the exception of the redness of the skin, which did not disappear for thirty-six hours more. The patient had been delirious during this period. The cuticle began to shed some time between the third and twelfth day, in large sheets, as pictured in the accompanying illustrations. The nails were shed in about four weeks after the acute stage. Crocker had an instance of this nature in a man with tylosis palmae, in which the skin was cast off every autumn, but the process lasted two months. Lang observed a case in which the fingers alone were affected.
There is a case of general and habitual desquamation of the skin in the Ephemerides of 1686; and Newell records a case which recovered under the use of Cheltenham water for several seasons.
Latham describes a man of fifty who was first seized about ten years previously with a singular kind of fever, and this returned many times afterward, even twice in the course of the same year, attended with the same symptoms and circumstances, and appearing to be brought on by obstructed perspiration, in consequence of catching cold. Besides the common febrile symptoms, upon the invasion of the disease his skin universally itched, more especially at the joints, and the itching was followed by many little red spots, with a small degree of swelling. Soon after this his fingers became stiff; hard, and painful at the ends, and at the roots of the nails. In about twenty-four hours the cuticle began to separate from the cutis, and in ten or twelve days this separation was general from head to foot, during which time he completely turned the cuticle off from the wrists to the fingers'
ends like a glove, and in like manner on the legs to the toes, after which his nails shot gradually from their roots, at first with exquisite pain, which abated as the separation of the cuticle advanced, and the old nails were generally thrown off by new ones in about six months. The cuticle rose in the palms and soles like blisters, having, however, no fluid beneath, and when it came off it left the underlying cutis exposed for a few days.
Sometimes, upon catching cold, before quite free from feverish symptoms, a second separation of the cuticle from the cutis occurred, but it appeared so thin as to be like scurf, demonstrating the quick renewal of the parts.
There is a similar case in the Philosophical Transactions in a miller of thirty-five who was exposed to great heat and clouds of dust. On the first cold a fever attacked him, and once or twice a year, chiefly in the autumn, this again occurred, attended with a loosening and detachment of the cuticle. The disorder began with violent fever, attended with pains in the head, back, limbs, retching, vomiting, dry skin, furred tongue, urgent thirst, constipation, and high-colored urine. Usually the whole surface of the body then became yellow. It afterward became florid like a rash, and then great uneasiness was felt for several days, with general numbness and tingling; the urine then began to deposit a thick sediment. About the third week from the first attack the cuticle appeared elevated in many places, and in eight or ten days afterward became so loose as to admit of its easy removal in large flakes. The cuticle of the hands, from the wrists to the fingers' ends, came off like a glove. The patient was never disposed to sweat, and when it was attempted to force perspiration he grew worse; nor was he much at ease until his urine deposited a sediment, after which he felt little inconvenience but from the rigidity of the skin. The nails were not detached as in the previous case.
