25.4.1 Data elements. The data dictionary defines each data element, assigns it a meaningful name, specifies both its logical and physical characteristics, and records information concerning how it is used. Table 25.1 summarizes the type of information that might be recorded in the data dictionary.
General Discussion. Moebius syndrome is a rare neurological disorder characterized by weakness or paralysis (palsy) of multiple cranial nerves, most often the 6th (abducens) and 7th (facial) nerves. Other cranial nerves are sometimes affected. The disorder is present at birth (congenital).
SjÃ¶gren syndrome is a systemic chronic inflammatory disorder characterized by lymphocytic infiltrates in exocrine organs. Most individuals with SjÃ¶gren syndrome present with sicca symptoms, such as xerophthalmia (dry eyes), xerostomia (dry mouth), and parotid gland enlargement, which is seen in the image below. (See Presentation.) Marked bilateral parotid gland enlargement in a patient with primary SjÃ¶gren syndrome.