[Signet ring cell colorectal carcinom - case report].

Signet ring cell colorectal carcinoma is a rare aggressive tumor. The incidence of this desease is very low in young patients and accounts up to 1% of all surgical patients with colorectal cancer. The infrequency of the disease among young patients makes the diagnosis more difficult and the prognosis less favourable.

[Personal experience with the sleep apnea syndrome].

In three children aged 3, 9 and 10 years the syndrome of sleep apnea with typical manifestations of obstructive apnoeic episodes during sleep is described. In two instances the nocturnal periodic apnoeic spells were associated with marked varying hypoxemia, objectively recorded by continuous monitoring of the transcutaneous oxygen tension using a skin oximeter. In one child the cause of airway obstruction during sleep were hypertrophic tonsils and adenoid vegetation, in the other two children in the nocturnal apnoeic spells above all the functional component participated, expressed by increased relaxation of the oropharyngeal musculature during sleep.