The Salivary Glands
DEVELOPMENTAL ABNORMALITIES Print Section Listen The most common developmental salivary gland disorder is salivary tissue in an ectopic location such as the nasopharynx or middle ear (salivary gland choristoma). Other…
The Paranasal Sinuses
NORMAL DEVELOPMENT Print Section Listen The maxillary sinuses are the first of the paranasal sinuses to develop. In the neonate, the maxillary sinuses are quite small and may be partially…
Intracranial Vascular Abnormalities
DEVELOPMENTAL VARIATIONS AND VASCULAR ANOMALIES Print Section Listen Arterial Agenesis, Aplasia, and Hypoplasia Developmental abnormalities that result in absence or narrowing of intracranial vascular structures are common. However, collateral pathways…
The Vascular System
NONINFECTIOUS VASCULITIS Print Section Listen The term vasculitis refers to inflammation of blood vessels. There are various classification schemes for noninfectious vasculitis, based on the sizes of the blood vessels…
Intracranial Infections
CONGENITAL INFECTION Print Section Listen Congenital infections are acquired by the maternal hematogenous-transplacental route or by exposure to organisms during passage through the birth canal. Most fetal bacterial infections are…
Anomalies of the Great Vessels
ANOMALIES OF THE AORTA Print Section Listen Terminology The aorta consists of thoracic and abdominal components. There are 5 segments of the thoracic aorta. The aortic root is a short…
Metabolic and Destructive Disorders of the Brain
PREDOMINANT INVOLVEMENT OF WHITE MATTER Print Section Listen Adrenoleukodystrophy (X-linked) X-linked adrenoleukodystrophy is a metabolic disorder that predominantly affects the central nervous system (CNS), adrenal glands, and testicles. The clinical…
Pulmonary Infection
CLINICAL AND RADIOGRAPHIC PRESENTATIONS Print Section Listen Respiratory System Defense Mechanisms Against Infection Pneumonias, sometimes recurrent, occur with increased frequency in children who have defective immune or pulmonary defense mechanisms….
Acquired Diseases of the Heart and Pericardium
DISEASES OF THE MYOCARDIUM AND ENDOCARDIUM Print Section Listen Terminology of Myocardial and Endocardial Diseases The myocardium is the middle layer of the heart wall and is predominantly composed of…
Hydrocephalus
MECHANISMS OF HYDROCEPHALUS Print Section Listen Hydrocephalus refers to abnormal dilation of the ventricular system in association with narrowing of the subarachnoid spaces. Elevation of the intraventricular pressure may or…
