doiSerbia

Coexisting diseases modifying each other’s presentation - lack of growth failure in Turner syndrome due to the associated pituitary gigantism

Dragović Tamara (Military Medical Academy, Clinic for Endocrinology, Belgrade + University of Defence, Faculty of Medicine of the Military Medical Academy, Belgrade)
Đuran Zorana (Military Medical Academy, Clinic for Endocrinology, Belgrade)
Jelić Svetlana (Clinical Hospital Center “Bežanijska kosa”, Clinic for Internal Medicine, Department of Endocrinology, Belgrade + Faculty of Medicine, Belgrade)
Marinković Dejan (Military Medical Academy, Clinic for Endocrinology, Belgrade)
Kiković Saša (Military Medical Academy, Clinic for Endocrinology, Belgrade)
Kuzmić-Janković Snežana (Military Medical Academy, Clinic for Endocrinology, Belgrade)
Hajduković Zoran (Military Medical Academy, Clinic for Endocrinology, Belgrade + University of Defence, Faculty of Medicine of the Military Medical Academy, Belgrade)

Introduction. Turner syndrome presents with one of the most frequent chromosomal aberrations in female, typically presented with growth retardation, ovarian insufficiency, facial dysmorphism, and numerous other somatic stigmata. Gigantism is an extremely rare condition resulting from an excessive growth hormone (GH) secretion that occurs during childhood before the fusion of epiphyseal growth plates. The major clinical feature of gigantism is growth acceleration, although these patients also suffer from hypogonadism and soft tissue hypertrophy. Case report. We presented a girl with mosaic Turner syndrome, delayed puberty and normal linear growth for the sex and age, due to the simultaneous GH hypersecretion by pituitary tumor. In the presented case all the typical phenotypic stigmata related to Turner syndrome were missing. Due to excessive pituitary GH secretion during the period while the epiphyseal growth plates of the long bones are still open, characteristic stagnation in longitudinal growth has not been demonstrated. The patient presented with delayed puberty and primary amenorrhea along with a sudden appearance of clinical signs of hypersomatotropinism, which were the reasons for seeking medical help at the age of 16. Conclusion. Physical examination of children presenting with delayed puberty but without growth arrest must include an overall hormonal and genetic testing even in the cases when typical clinical presentations of genetic disorder are absent. To the best of our knowledge, this is the first reported case of simultaneous presence of Turner syndrome and gigantism in the literature.

Keywords: turner syndrome, gigantism, pituitary neoplasms, adolescent, women, puberty, growth hormone, insulin like growth factor I