NURS 506 Week 5 Case Study 2 on Graves Disease Example

Case Study: Graves Disease With Early Thyroid Eye Disease in a 34-Year-Old Middle School Teacher

Patient Background

The patient is a 34-year-old Hispanic middle school science teacher who saw a family nurse practitioner after three months of a racing heart, a 14-pound weight loss despite a good appetite, trouble sleeping, heat intolerance, frequent loose stools and a hand tremor that students had noticed during lab demonstrations. Over the past month the eyes had felt gritty, and family members said the patient looked "startled." On examination, the pulse was 112 and regular, blood pressure 138/68 mm Hg, the skin warm and moist, and a fine tremor present in the outstretched hands. The gland was symmetrically enlarged, roughly double its expected volume, soft and painless, with a bruit over both lobes. Both upper lids were retracted, with mild redness of the conjunctivae and no double vision. Laboratory tests showed a suppressed thyroid-stimulating hormone level below 0.01 mIU/L, a free thyroxine level of 3.9 ng/dL and an elevated free triiodothyronine level, and thyrotropin receptor antibodies were positive, confirming Graves disease with early thyroid eye disease. The patient takes a combined oral contraceptive and no other medications, and reports a penicillin allergy that caused hives. A sibling has Hashimoto thyroiditis, and a parent has type 1 diabetes. The patient smokes about half a pack a day, drinks coffee heavily, is married with no children yet, plans a pregnancy within two years and is active in a Catholic parish.

Pathophysiology at the Cellular Level

Graves disease begins with a loss of immune tolerance to the thyroid-stimulating hormone receptor, a G protein-coupled receptor on the surface of thyroid follicular cells. Helper T cells that recognize the receptor escape the usual controls, and B cells produce IgG antibodies that bind it. Unlike most autoantibodies, which damage their target, these stimulating antibodies mimic the pituitary hormone itself (Karapanou et al., 2026).

When the antibody binds, the receptor activates its G protein, and adenylate cyclase raises cyclic adenosine monophosphate inside the cell. That second messenger switches on every step of hormone production: the sodium-iodide symporter brings more iodide into the cell, thyroglobulin synthesis increases, thyroid peroxidase iodinates tyrosine residues and couples them into thyroxine and triiodothyronine, and the cell takes up colloid and releases hormone into the blood (McCance & Huether, 2019). The same signal makes follicular cells divide and enlarge and increases the gland's blood supply, which explains the diffuse goiter and the bruit.

The defining feature is that this stimulation escapes feedback. Normally, high thyroid hormone levels suppress the pituitary's output of thyroid-stimulating hormone, and the gland slows down. In Graves disease the pituitary is suppressed, as the patient's undetectable level shows, but the antibodies keep stimulating the receptor regardless. Excess hormone then acts on nearly every cell. Triiodothyronine enters cells and binds nuclear receptors that increase transcription of genes for sodium-potassium pumps, mitochondrial enzymes and beta-adrenergic receptors. More pumps and less efficient mitochondria raise oxygen use and heat production, explaining the weight loss, heat intolerance and warm, moist skin. Greater beta-adrenergic sensitivity accounts for the tachycardia, tremor and anxiety, and faster gut motility causes the loose stools.

The eye findings arise from the same antigen in another tissue. Orbital fibroblasts express the thyroid-stimulating hormone receptor along with the insulin-like growth factor 1 receptor, and the two signal together. Activated fibroblasts produce hyaluronan, a glycosaminoglycan that draws in water, and some differentiate into fat cells, while T cells infiltrate the orbit. The swollen muscles and fat push the eye forward and can, in severe disease, compress the optic nerve (Markantes et al., 2026). Smoking increases the risk and severity of eye involvement.

Holistic Plan of Care

Genetic Counseling and Testing

Graves disease runs in families, as this patient's sibling and parent with autoimmune disease show, but no single gene causes it. Susceptibility involves several genes that shape immune regulation, including human leukocyte antigen variants, together with triggers such as smoking, stress and infection. Counseling explains that there is no predictive genetic test, that relatives have a higher risk of autoimmune thyroid disease and should know its symptoms, and that a future child's thyroid function will be checked if antibody levels remain high during pregnancy.

Physical Care

Propranolol controls the tachycardia and tremor within days by blocking beta-adrenergic receptors. Methimazole inhibits thyroid peroxidase, lowering hormone production over several weeks. Long-term therapy is now a reasonable first choice: conventional courses of 12 to 18 months end in relapse in about half of patients, while continuous methimazole for 60 months or more led to relapse rates below 20% with few late adverse effects (Azizi, 2026). Thyrotropin receptor antibody levels may not fall permanently for five to six years, which supports extending therapy instead of stopping early (Azizi et al., 2024). Because the patient plans a pregnancy, the advanced practice nurse discusses switching to propylthiouracil before conception and through the first trimester, since methimazole carries a risk of birth defects early in pregnancy. Radioiodine is avoided given the active eye disease. The eyes are managed with lubricating drops, sunglasses and prompt ophthalmology referral; intravenous glucocorticoids or the insulin-like growth factor 1 receptor antibody teprotumumab are options if eye disease becomes moderate to severe (Markantes et al., 2026).

Patient Education

The patient learns to stop methimazole and call the same day for a sore throat, fever or mouth ulcers, which can signal agranulocytosis, and to report yellowing of the skin or dark urine. Teaching also covers why laboratory tests are repeated every four to six weeks at first, why caffeine worsens the tremor, and why smoking cessation is the single most important step for the eyes.

Psychosocial Care

Hyperthyroidism causes anxiety, irritability and poor sleep, which strain teaching and family life. The nurse validates that these symptoms are physical and improve with treatment, screens for depression, and offers a work note to reduce afternoon duties during the first month. A smoking cessation plan with counseling and nicotine replacement starts at this visit.

Spiritual and Cultural Care

The patient finds strength in attending Mass and asked whether fasting during Lent was safe. The plan advises postponing fasting until the thyroid is controlled and offers to speak with the parish priest if helpful. Spanish is spoken at home, so education materials are provided in English and Spanish, and the patient's spouse is invited to visits, respecting the family's preference for shared decisions.

References

Azizi, F. (2026). Long-term antithyroid drug therapy in the management of Graves' hyperthyroidism: An updated narrative review. Endocrine Practice, 32(10), 1512-1521. https://doi.org/10.1016/j.eprac.2026.05.005

Azizi, F., Mehran, L., Abdi, H., & Amouzegar, A. (2024). Approach to the patient considering long-term antithyroid drug therapy for Graves' disease. The Journal of Clinical Endocrinology & Metabolism, 109(10), e1881-e1888. https://doi.org/10.1210/clinem/dgae456

Karapanou, O., Saltiki, K., Markantes, G. K., Kasotas, A., Michalaki, M., & Effraimidis, G. (2026). How to manage autoimmune hyperthyroidism (Graves' disease): From differential diagnosis to emerging immunological therapies. Drugs in Context, 15, Article 2026-4-10. https://doi.org/10.7573/dic.2026-4-10

Markantes, G. K., Effraimidis, G., Karapanou, O., Saltiki, K., & Michalaki, M. (2026). How to manage thyroid eye disease: Recent advances: A narrative review. Drugs in Context, 15, Article 2026-4-5. https://doi.org/10.7573/dic.2026-4-5

McCance, K. L., & Huether, S. E. (2019). Pathophysiology: The biologic basis for disease in adults and children (8th ed.). Elsevier.