ESPE Abstracts

Background: Ullrich-Turner-Syndrome is usually characterized by typical morphological features. Short status, delayed bone age in childhood and gonadal dysgenesis with delayed or lacking pubertal development, amenorrhoea and infertility. Other symptoms like thyroid dysfunction, heart defects, diabetes, behavioural or learning problems vary. The genotype/phenotype correlation may be poor. Especially in UTS mosaicism, spontaneous puberty may occur.

Objective and hypotheses: We report a girl with UTS mosaicism with lack of morphological features and precious puberty.

Patient and Methods: She is the first of 2 children born after normal pregnancy at term with low birth weight of 2820 g. Her uncle suffered from Klinefelter syndrome. At the age of 8 she developed pubertal hair and thelarche. Bone age was 12.5y and she measured 139 cm with a target height of 169 cm. LH was 2.5 U/l (<12), FSH 6.3 U/l ((0.4–6.6), oestradiol 25 ng/l (6–27) with normal levels of beta-HCG, alpha-1-foetoprotein, testosterone, prolactin, IGF1 and IGFBP3. She then showed behavioural problems and learning difficulties. Menarche was at the age of 9 8/12y. She also developed an insulin insensitivity with a peak insulin level of 302.3 μU/ml after 60 min and had a thyroid dysfunction. An ACTH-Test showed normal levels. We treated the patient with growth hormone, gonadotropin-releasing hormone analogues and thyroid hormones. A chromosomal analysis war added.

Results: The chromosomal result was 46/45 XX/X0 female. During the treatment the girl showed moderate growing (growth rate 7.2 cm), while we managed to stop puberty development and bone age acceleration.

Conclusion: Our patient showed a rare condition of UTS which is not recognized by appearance. Apart from hypothyroidism, for therapeutic considerations, short stature and precocious puberty with mental development are relevant. Chromosomal analysis should be mandatory in short stature or reduced prospective height even if there are no morphological features.