METATARSALGIA (MORTON’S PAINFUL AFFECTION OF THE FOOT), WITH AN ACCOUNT OF SIX CASES CURED BY OPERATION. BY THOMAS S. K. MORTON, M.D., PROFESSOR OF SURGERY IN THE PHIL'JttJtffiWffr POLYCLINIC, ETC. Reprinted, from the Transactions of the Philadelphia Academy of Surgery. Meeting of March 6th, iSgj. PHILADELPHIA: 1893. \_Read before the Philadelphia Academy of Surgery, March 6, METATARSALGIA (MORTON’S PAINFUL AFFEC- TION OF THE FOOT), WITH AN ACCOUNT OF SIX CASES CURED BY OPERATION. By THOMAS S. K. MORTON, M.D., Professor of Surgery in the Philadetfkia Polyclinic, etc. The affection that has come to be best known as “ Morton’s Painful Affection of the Foot,” or “ Morton’s Toe,” was first described and a method of certain cure presented by Dr. Thomas G. Morton, of Philadelphia, in 1876, under title of “ A Peculiar Painful Affection of the Fourth Metatarso-phalangeal Articulation.”1 In subsequent publications2 he has confirmed his views relative to cause and treatment, and reported large numbers of cases. The disease under consideration may be described as a pain- ful affection of the plantar digital nerves, directly caused by pressure upon or pinching of them by certain portions of the metatarso-phalangeal articulations—especially the fourth. The reason for the fourth toe being the almost invariable seat of origin of the train of painful and neurotic symptoms to be described is ascribed to anatomical causes by Morton in the following language: “ The occurrence of neuralgia may be understood by a refer- ence to the anatomy of the parts. The metatarso-phalangeal joints of the first, second, and third toes are found on almost a direct line with each other, while the head of the fourth meta- tarsal is from one-eighth to one-fourth of an inch behind the head of the third, and the head of the fifth is from three-eighths to half an inch behind the head of the fourth; the joint of the third, therefore, is slightly in advance of the joint of the fourth, and the joint of the fifth is considerably behind the joint of the fourth. “ The fifth metatarsal joint is so much posterior to the fourth that the base of first phalanx of the little toe is brought on a 1 American Journal Medical Sciences, January, 182&*.. . 2 Surgery in the Pennsylvania Hospital, i88o