Table 1.

Clinical characteristics of the family.

Characteristic	Proband	Mother	Grandfather
Age (years)	17	50	87
Height (cm)	165	156	165
Body weight (kg)	52.6	56	45.3
Body mass index (kg/m2)	19.3	23	16.6
FPG (mg/dL)	75	107	117
Insulin (μU/mL)	50	37	125.3*
C-peptide (ng/mL)	2.08	2.62	7.6
Proinsulin (pmol/L)	5.4	ND	ND
HbA1c (%)	5.6	6.5	6.4
Triglycerides (mg/dL)	87	114	109
HDL cholesterol (mg/dL)	70	72	43
LDL cholesterol (mg/dL)	82	125	96
Anti-IR antibody	None	ND	ND
Birth weight (g)	3000	3900	Unknown
Acanthosis nigricans	None	None	None
Hirsutism	None	None	None
Diabetes treatment	None	None	DPP4I
Estimated diabetes onset	No diabetes	50 years	77 years

*Postprandial value.

Anti-IR, anti-insulin receptor; BMI, body mass index; DPP4I, dipeptidyl peptidase 4 inhibitor; FPG, fasting plasma glucose; HbA1c, hemoglobin A1c; HDL, high-density lipoprotein; LDL, low-density lipoprotein; ND, not determined.