Thin fine linear extensions radiating out from the skull that look on an X-ray like hair standing “on-end” from the skull, an appearance associated with hemolytic anemias such as sickle cell disease and thalassemia.
The “hair” represents the accentuated trabeculae extending between the inner and outer skull tables through the diploe in the expanded bone marrow space (because the bone marrow has expanded due to the excessive breakdown of red blood cells). The “hair” appears to be “on end” because the trabeculae are oriented perpendicular to the inner and outer tables of the skull.
A wad of swallowed hair. Hairballs sometimes cause blockage of the digestive system, especially at the exit of the stomach. Also called ‘trichobezoar.
- Hairy cell leukemia
A rare type of chronic leukemia in which the abnormal white blood cells appear to be covered with tiny hairs when examined microscopically. The hairy cells are malignant B lymphocytes. There may be too few normal blood cells of all types because of an exc
An unpleasant odor from the mouth, commonly referred to as bad breath. Halitosis can be caused by the consumption of certain foods, poor oral hygiene, alcohol or tobacco use, dry mouth, or by certain chronic medical conditions.
- Hallervorden-Spatz disease
A genetic disorder in which there is progressive neurologic degeneration with the accumulation of iron in the brain. The gene for the disease is on chromosome 20 in region 20p13-p12.3. The syndrome was first described by Julius Hallervorden and Hugo Spatz in 1922 in 5 sisters who showed increasing dysarthria (trouble speaking) and progressive dementia […]
An auditory hallucination is an hallucination involving the sense of hearing. Called also paracusia and paracusis. A gustatory hallucination is an hallucination involving the sense of taste. A hypnagogic hallucination is a vivid dreamlike hallucination at the onset of sleep. Hypnopompic hallucination is a vivid dreamlike hallucination on awakening. Kinesthetic hallucination is an hallucination involving […]