Joslin described his mother's case in The Treatment of Diabetes Mellitus (1916):
A woman showed the first symptoms of diabetes in the spring of 1899 at 60 years of age and 5% of sugar was found in June. She had gradually lost, during the preceding fifteen years, twenty pounds and weighed 165 pounds when the diagnosis was made. Under rigid diet, the urine promptly became sugar-free, the tolerance rose to 130 grams and safe for very brief intervals and remained so for nine years until 1908. In 1909, a carbuncle appeared. With prompt surgical care, vaccines, the restriction of carbohydrates and the temporary utilization of an oatmeal diet, the sugar disappeared and the carbuncle healed promptly, but the urine did not remain permanently sugar-free, although only about 30 grams of sugar was excreted. Residence in the hospital for a few days in September of 1912, in order to have a few teeth removed, lowered the sugar to 0.8%.
Except for brief periods of illness due to the carbuncle and pneumonia, the patient remained well during all these years and was unusually strong and vigorous for a woman of 73 until she finally succumbed to a lingering illness subsequent to a hemiplegia, and death finally occurred due to a terminal pneumonia in 1913.
Quoted in Elliott P. Joslin, MD: A Centennial Portrait, by Donald M. Barnett (Joslin Diabetes Center, 1998).