A 15 years old boy with insulin dependent diabetes mellitus is brought to the ER by his father because of severe abdominal pain and vomiting for the past six hours. the father says he has been complaining of mild stomach ''cramps'' and ''thirst'' for the past few days, but nothing this extreme. when the father leaves the room, the boy reluctantly admits that he has not been taking his insulin because he is mad at his parents for going away on cruise and ''leaving him'' for five days. his blood pressure is 100/70mmhg, pulse is 9/min, and respirations are 30/min. physical examination shows dry skin and mucus membranes and diffuse abdominal pain, laboratory studies show:

Glucose: 675 mg/dL

Sodium: 136mEq/L

Potassium: 6.0mEq/L

Bicarbonate: 11 mEq/L

1. For this patient, what is the most likely diagnosis?

2. List the three types of diabetes and discuss the parthenogenesis, treatment, and long term sequelea for each type?