Prediabetes, a High ALT, and a Request for Secrecy
J.R., a 14-year-old, comes alone to your clinic for a sports physical after being cut from the basketball team. BMI is 33.4 kg/m² (>99th percentile), blood pressure 124/78 mm Hg (122/76 on repeat), acanthosis nigricans at the neck and axillae, no striae, Tanner stage IV. His mother has type 2 diabetes and his father had a myocardial infarction at 42. Fasting labs from a health-fair screening show glucose 106 mg/dL, A1c 5.9%, ALT 68 U/L, AST 40 U/L, LDL 128 mg/dL, HDL 36 mg/dL, triglycerides 190 mg/dL. He drinks two sports drinks and one sweetened iced tea daily, sleeps about 6 hours on school nights, and plays no organized sports. On a private screen he scores positive on the PHQ-2 and says, "Don't tell my parents about the sugar thing - or the questions."
1. Interpret the screening labs. What can you diagnose today, and what needs confirmation?
Read the worked answer
Glycemia: A1c 5.9% is in the prediabetes range (5.7-6.4%) and FPG 106 mg/dL is impaired fasting glucose (100-125). Neither alone diagnoses diabetes; confirm with a second abnormal test on a separate day (repeat A1c, FPG, or 2-hour OGTT). Do not label diabetes without a confirmatory value, or symptoms plus a random glucose ≥200 mg/dL.
A1c caveats: hemoglobinopathies (sickle cell trait, thalassemia), iron deficiency, recent transfusion, hemolysis, and ethnicity-related differences in red cell turnover can shift A1c. If the A1c and glucose disagree, use an OGTT.
ALT 68: suggests metabolic dysfunction-associated steatotic liver disease, but that is a diagnosis of exclusion and needs confirmation. Repeat ALT/AST in about 3 months after lifestyle change; exclude hepatitis B and C, EBV/CMV if acute, autoimmune hepatitis, ceruloplasmin, alpha-1 antitrypsin, and check CK for a muscle source. Persistent elevation or ALT more than twice the upper limit of normal → pediatric gastroenterology/hepatology.
Lipids: LDL 128 is borderline-high for age (130-159 is high), HDL 36 is low, triglycerides 190 are high for 10-19 years (>130). Repeat fasting and screen first-degree relatives for familial hypercholesterolemia.
Blood pressure: 124/78 is roughly the 85th-90th percentile for a 14-year-old - elevated BP. Confirm on 3 occasions and consider ambulatory monitoring.
Also screen for obstructive sleep apnea (snoring, daytime sleepiness) and complete the PHQ-9.
2. Lay out a first-3-month plan with specifics: what you prescribe, what you recheck, and what would trigger medication or referral.
Read the worked answer
Anchor: intensive health behavior and lifestyle treatment - family-based, multicomponent, at least 26 contact hours over 3-12 months. In practice: monthly visits, dietitian referral, a group program, and one written goal at a time.
Countable targets:
- Eliminate sugar-sweetened beverages - his two sports drinks plus sweet tea are likely 300-400 kcal/day; water or milk with meals.
- 5-2-1-0: 5 fruits/vegetables, ≤2 hours screens, ≥1 hour activity, 0 sugary drinks.
- 60 minutes of moderate-to-vigorous activity daily, built on something he will actually do (walking, pickup basketball).
- Sleep 8-10 hours; screen for OSA.
Mental health: PHQ-2 positive → complete PHQ-9, assess safety, refer to behavioral health. Depression affects weight and motivation and is not optional to treat.
Recheck: A1c or FPG, ALT/AST, fasting lipids at 3-6 months; blood pressure at every visit.
Medication/referral thresholds:
- Metformin is not first-line for adolescent prediabetes; consider it or refer if A1c/FPG is rising despite 3-6 months of intensive lifestyle change.
- For obesity itself, AAP guidance supports considering anti-obesity pharmacotherapy (e.g., a GLP-1 receptor agonist) at age ≥12 alongside lifestyle - discuss and check coverage.
- Statin discussion if LDL remains ≥160, or ≥130 with additional risk factors, after about 6 months - refer to lipids.
- Endocrinology if repeat A1c ≥6.4% or FPG ≥126 mg/dL, rapid weight gain, or pharmacotherapy you cannot manage.
Keep the visits from being only about weight - address the team cutoff and teasing, and set a fitness/strength agenda.
3. He asked you not to tell his parents. How do you handle the mood screen and the confidentiality request?
Read the worked answer
Be transparent about the rules rather than promising secrecy: "What we talk about stays between us unless I think you're in danger or someone is hurting you - and if I ever need to tell your parents something to keep you safe, I'll tell you first and we'll do it together."
Ask what he fears: being yelled at, blamed, pulled from sports, or something worse. Screen for physical abuse and for safety at home - that answer changes the plan.
Escalation ladder for the mood screen:
- Passive ideation without plan, intent, or means, and a supportive adult available → work with him on disclosure and a safety plan while arranging the mental health referral.
- Intent, plan, or access to means → confidentiality yields. Involve the guardians and crisis services (988) and document your reasoning.
Know the law: many states allow minors to consent to a limited number of outpatient mental health sessions, and HIPAA does not give a parent automatic access when the minor lawfully consented under state law. Check before sharing anything.
The "sugar thing": the labs are in the chart, and the parent portal may expose them. Ask about proxy access and how results are released - better to plan the conversation than have his parents read it.
Document the discussion, the limits you explained, and the safety assessment.