[Differential physical growth during the first years of life. III. Body composition].

The present article report the results of longitudinally research, on growth children, of both sex and ages from 0 to 1 year of extrauterine life. We obtained measures that appraisal the muscular and fat tissues: upper arm and leg circumferences; muscle and fat of upper arm areas; triceps, subscapular and supra-iliac skinfolds. Moreover, we report relationship dates between weight and stature, which is a good indicator for morphological body equilibrium.

[Differential physical growth during the 1st year of life. II. Growth of the head].

The corporal segment that display the major growth velocity before and after born is the head; that is, once a baby is born, it represents the fourth part of the stature, it has the greater corporal circumference, and their development is superior than other corporal segments. However, the growth shape of the craniofacial structures is different; so, the growth gradient of brain, is the responsible of the morphological view described previously; the facial structures follow the general growth curve; moreover, the facial bone that contributes with the growth of brain, describes mixed growth gradients. This complex shape of the head growth, requires the existence of growth standards for these structures.

[Differential physical growth during the first year of life. I. Body growth].

Keeping up to date the children growth and development standards, it is a necessity of main order for Health Secretary, because of it is possible an adequate pediatric evaluation. The present study, reports the results of a longitudinal research on growth in children of both sexes and ages from 0 to 1 year of extrauterine life. In all, we got 44 growth measures of the body, head and corporal composition.

[Age of onset of spermaturia (spermache) in 669 Mexican children and its relation to secondary sexual characteristics and height].

The onset of production of spermatozoa (spermarche) indicates the beginning of reproductive capacity in men. With the purpose to establish the age of initiation of spermaturia, we performed a transversal study in 669 Mexican boys aged 9-16 years old, searching for the presence of spermatozoa in the first urine sample during five consecutive days. Besides, physical examination, including Tanner stages for genitalia and pubic hair was practiced.

[Estimation of the probability of heterozygosity in Duchenne-type progressive muscular dystrophy].

The severe Duchenne type of muscular dystrophy is inherited as an X-linked recessive trait. Approximately two thirds of healthy female heterozygous carriers have a high serum creatine kinase (SCK). A suspected carrier with a normal SCK level therefore, presents an important problem in genetic counselling.

Brief clinical report: corneal dermoids and short stature in brother and sister--a new syndrome?

We describe 2 sibs; brother and sister, with corneal dermoids and proportionately short stature. It is suggested that this is an autosomal recessive condition.

[Hypermethioninemia. Apropos of a case in a consanguineous couple].

We describe a female child from a consanguineous marriage (uncle-niece) with hypermethioninemia and hypermethioninuria without homocystinuria. She had several signs and symptoms previously undescribed in this pathology as growth retardation, generalized hypotonia, digestive disturbances, white skin, hypochromia of iris, thin, sparse and blond scalp hair. The pedigree suggests an autosomal recessive inheritance pattern.

Peculiar face, pectus carinatum and joint laxity in brother and sister.

This report describes a probably new syndrome seen in a brother and sister and characterized by joint laxity, pectus carinatum and a peculiar face with mild frontal bossing, low nasal bridge, lateral displacement of the inner malar hypoplasia, parrot-like nose, chubby cheeks, striking philtrum and arched upper lips.

[The genetic component of congenital cataract].

Twenty-four families with at least one patient with congenital cataract in each were studied. In eleven families (45%), the etiology was genetically determined (mendelian or chromosomal) and in the rest, it was not established. Bender's test was done to six patients which had more errors than expected for their chronological age; this suggests the importance of an early diagnosis of cataracts in order to correct and/or rehabilitate the eye lesions which are affecting the psychomotor development.

[Hemoglobin S. Apropos of a family].

The present paper describes a homozygote patient for the gene of hemoglobin S. The patient is the first child of non-consanguineous parents. The family study revealed 11 heterozygote subjects for the sickle cell disease.

[Genetic counseling of acrocephalosyndactylia].

The present paper describes a case with clinical and radiological characteristics of Apert's syndrome. He was the first offspring from second cousins marriage. We considered that in this case, consanguinity is an associated feature.