Introduction: Psoriasis is a common chronic inflammatory condition, often beginning in childhood in approximately one-third of cases. It can be associated with various other autoimmune diseases such as rheumatoid arthritis, celiac disease, and thyroid disorders. However, its co-occurrence with Van Wyk Grumbach syndrome has not been described in the pediatric population. This syndrome, resulting from untreated hypothyroidism, is characterized by early puberty and ovarian cysts.
Observation: A 15-year-old adolescent with a diagnosis of psoriasis since the age of 9 presented with chronic constipation and headaches. She exhibited early puberty (menarche at 9 years) and academic regression. Clinical examination revealed growth retardation and arterial hypertension. Hormonal analyses revealed primary hypothyroidism : Free Thyroxine (FT4)=7pmol/mL(9- 20 pmol/l), Thyroid Stimulating Hormone (TSH)=200 mIU/mL( 0,4 - 5 mUI/ml.). The ultrasound and scintigraphic appearance were suggestive of thyroiditis. Additionally, she experienced menstrual irregularities and pelvic pain. Radiological exploration revealed a left ovarian cyst. The diagnosis of Van Wyk Grumbach syndrome was established due to early puberty, hypothyroidism, and polycystic ovary. Treatment with l-thyroxine led to stabilization of blood pressure and hormonal levels. Her height remained below the target adult height.
Conclusion: Assessment of thyroid function appears necessary in pediatric patients with psoriasis. Early hormonal replacement therapy for hypothyroidism may alleviate the symptoms of Van Wyk Grumbach syndrome and mitigate its impact on stature.