Extreme Tall Stature in a Japanese Boy with a 48,XXYY Karyotype
نویسندگان
چکیده
We report an 18-yr-old Japanese boy with a 48,XXYY karyotype and extreme tall stature (194 cm). A GnRH test at 12.5 yr of age showed hypergonadotropism (LH, 4.2 → 72.2 mIU/mL; FSH, 28.9 → 61.7 mIU/mL), and an hCG test at 15.5 yr of age revealed a normal testosterone response (1.67 → 4.08 ng/mL). The tall stature is remarkable, because the mean adult height of Caucasian 48,XXYY patients is 181 cm. Although the underlying factors for the tall stature are unknown, this report indicates an association of the 48,XXYY karyotype with marked tall stature.
منابع مشابه
Cognitive, Affective Problems and Renal Cross Ectopy in a Patient with 48,XXYY/47,XYY Syndrome
Klinefelter syndrome is the most common sex chromosome abnormality (SCA) in infertile patients and 47,XXY genomic configuration constitutes most of the cases. However, additional Xs and/or Y such as 48,XXYY, 48,XXXY, and 47,XYY can occur less frequently than 47,XXY. Those configurations were considered as variants of Klinefelter syndrome. In this report, we present an infertile man with tall st...
متن کاملChromosome 2 fragility- 48, XXYY syndrome
We report a case of double male syndrome, a type of Klinefelter syndrome with 48, XXYY chromosome. The case had been referred to our department because of severe mental retardation and behavioural and psychiatric problems. In the karyotype analysis, the chromosome constitution of that 16–year–old case was revealed as 48, XXYY, fra 2q (32.2–32.3). More than 70 patients with 48, XXYY chromosome c...
متن کاملThe Emerging Ophthalmic Phenotype of XXYY Syndrome
48 XXYY is a sex chromosome tetrasomy condition which causes tall stature, hypergonadotrophic hypogonadism, facial dysmorphism, developmental delay and behavioural difficulties. Over 100 cases have been published in the literature but there is little information on the ophthalmic findings in these patients. Previously reported ophthalmic findings have included Duane anomaly, high myopia and ret...
متن کاملA new 48, XXYY/47, XYY syndrome associated with multiple skeletal abnormalities, congenital heart disease and mental retardation
While the XYY and XXYY syndromes have been several time described in patients, the combination of both syndromes in an individual is a rare event and may result in a severe phenotype. In the present observation, a boy with congenital scoliosis due to segmented thoracic hemivertebra associated with radioulnar synostosis and congenital heart disease is described. Chromosome G-banding and FISH ana...
متن کاملBalanced Reciprocal Translocation t(X;1) in a Girl with Tall Stature and Primary Amenorrhea
AbstractChromosomal translocations constitute one of the most important, yet uncommon, causes of primary amenorrhea and gonadal dysgenesis. Although X-autosome translocations are frequently associated with streak gonads and clinical features of the Turner syndrome, the majority of X-autosome carriers may present with a variable phenotype, developmental delay, and recognizable X-linked syndrome ...
متن کامل