A child with a ring G chromosome (46,XX, Gr).

نویسندگان

  • N C Nevin
  • B MacLaverty
  • W A Campbell
چکیده

The patient was first seen at the age of 4 years 2 months because of persistent vomiting and failure to thrive. She was born in July 1965 at 38 weeks gestation after an uncomplicated pregnancy and a normal delivery; the birthweight was 2818 g. She was the eldest of four sibs of unrelated healthy parents aged 24 (father) and 22 years (mother) at the time of her birth. The mother had no known miscarriages. Four generations of the familiy were reviewed without uncovering any birth defect or hereditary disorder. Two days after the birth, the parents were informed that the baby was a mongol. Mental and motor development was slow. She sat up at 15 months, stood at 24 months, and walked at 42 months. She also failed to develop any speech. Apparently she thrived quite well until 8 weeks before admission to hospital in October 1969, when she began vomiting after every meal. This became persistent with evidence of dehydration and weight loss (4 kg). Examination revealed a thin, pale, and apathetic child. She measured 85 cm (below 3rd centile) in length, weighed 8-6 kg (below 3rd centile), and had a head circumference of 49 cm. Though she had an odd facies, her appearance did not suggest mongolism. The bridge of the nose was broad and prominent; and the ears were large and low set. The eyes were normal, except for a slight antimongoloid slant to the palpebral fissures. She also had micrognathia and a high arched palate. The heart, lungs, and abdomen were normal. There was no abnormality of the central nervous system. The stools were bulky, pale to almost white, and contained little or no bile pigment. There was no urobilinogen in the urine. The faeces contained no sugars and had a normal amino acid pattern. On no occasion was the patient jaundiced nor did her plasma bilirubin

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Postnatal diagnosis of constitutive ring chromosome 13 using both conventional and molecular cytogenetic approaches.

We describe the first postnatal diagnosis of a child from Central Brazil with de novo cytogenetic alterations in 13q showing malformations of the brain, eyes, distal limbs, and genitourinary tract, and severe intellectual disability. The karyotype was a constitutive 46,XX,r(13)[77]/45,XX,-13[17]/46,XX,idic r(13)[6]. Interphase and metaphase fluorescence in situ hybridization analyses also showe...

متن کامل

Two cases of ring chromosome 11.

Two cases of ring chromosome 11 are reported. Both had mental retardation, microcephaly, and short stature. High resolution G banding in case 1 showed no visible loss of chromatin, the karyotype being assessed as 46,XX,r(11) (p15 X 4q2 X 5). In case 2, a Wilm's tumour developed at 8 months and the child died at 18 months. Cytogenetic analysis by Q banding demonstrated minimal chromosome deletio...

متن کامل

Transmission of a ring chromosome 18 from a mother with 46,XX/47,XX, + r(18) mosaicism to her daughter, resulting in a 46,XX,r(18) karyotype.

A 6 month old patient is reported with a ring chromosome 18 confirmed by cytogenetic studies and in situ hybridisation. Her clinical features were similar to previous cases of ring chromosome 18 syndrome. The ring chromosome was inherited from the phenotypically and mentally normal mother with a mos 46,XX/47,XX, + r(18) karyotype.

متن کامل

Smallest critical region for microcephaly in a patient with mosaic ring chromosome 13.

A ring chromosome 13 or r(13) exhibits breakage and reunion at breakage points on the long and short arms of chromosome 13, with deletions of the chromosomal segments distal to the breakage points. The r(13) chromosome accounts for approximately 20% of ring chromosomes compatible with life. We describe a female patient with mental retardation, growth retardation, microcephaly, craniofacial dysm...

متن کامل

Chromosomal Analysis Of Couples With Bad Obstetric Histoty

Background and Objective: Pregnancy termination and recurrent abortion are one of the common complications during pregnancy and in patients with a bad obstetric history. Materials and Methods: In this study, a total of 154 individuals including 75 couples four single women from different communities and ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Journal of medical genetics

دوره 8 2  شماره 

صفحات  -

تاریخ انتشار 1971