[Myopathy and hypothyroidism]. / Miopatía e hipotiroidismo.

Muscular disturbances in hypothyroid children are: generalized muscular weakness of proximal predominance, muscular hypotonicity, pseudohypertrophy (of gastrocnemius muscles chiefly), slow relaxation stage of osteotendinous reflexes, rise of muscular enzymes (CPK andaldolase), unspecific electromyographic changes and histopathologic disturbances comprised by persistent decrease of fibers type II. All these changes are reversible with thyroglobulin therapy; therefore they exert no influence on the prognosis of hypothyroid patients.

[Feeding of low-birth-weight infants]. / Alimentación en niños de peso bajo al nacimiento

A child with low birth-weight is defined. Physiological and biochemical bases for the nutrition of these babies are given. Breast-feeding is recommended describing advantages and disadvantages compared with other milk formulas. Some artificial milk formulas in the national market are analyzed and modified milk or protein-modified milk are recommended as substitutes for mother's milk.

[Hypoglycemia in the newborn infant subsequent to hyperplasia of beta cells of the pancreas]. / Hipoglicemia en el recién nacido consecutiva a hiperplasia de células beta del páncreas

A case of hypoglycemia of difficult control and resistant to treatment due to hypersinsulinism as a result of hypertrophy of beta celis of the pancreas in the newborn perior is analyzed. Based on this case, hypoglycemia of the newborn is discussed, analyzed etiology, pathogenesis, symptomatology, diagnosis and treatment. Emphasis is place on the lack of clear symptoms and signs at this age, on the differential diagnosis, on the entities with which it can be associated or confused, and on the need to make an early diagnosis in order to prevent brain damage.

[Pediatrics in Mexico. What it is and what is should be]. / La pediatría en México. Lo que es y lo que debiera ser

The present situation of the pediatrician in Mexico is described and the effects on medicine in the country are outlined. The evolution of pediatrics in the country in the past 35 years and what is expected in the future if the actual structure is not changed are discussed. What a real pediatrician should be is defined and solutions are offered to solve the problem.

[Adoerse effects by the administration of salicylates]. / Efectos indeseables por la administración de los salicilatos

Two cases that illustrate one of the side-effects of salicylates are presented. Both cases manifested as non thrombocytopenic purpura. Indications and contraindications for the use of salicylates are described. Emphasis is made not to use them as analgesics or antipyretics in cases with congential or acquired defects in the coagulation mechanism. Other side-effects of salicylates are described.