$args = array('child_of' => 17);
$categories = get_categories( $args );
foreach($categories as $category) { 
    echo '
Category: name ) . '" ' . '>' . $category->name.' 
 ';
    echo '
 Description:'. $category->description . '
';
    echo '
 Post Count: '. $category->count . '
';  
}