Category: H

In the newborn, a ring of long, dark, coarse hair surrounding a midline nodule on the scalp. This may indicate neural tube closure defect.  

Excessive deposition of iron in the liver, found in patients with cirrhosis and hemochromatosis.  

Shock produced by extremely low blood sugars (e.g., less than 40 mg/dl), usually caused by an injection of an excessive amount of insulin, failure to eat after an insulin injection, or rarely by an insulin-secreting tumor of the pancreas. Insulin-related hypoglycemic shock may be intentionally induced in the treatment of certain psychiatric conditions.  

In chemistry, compounds that proceed from one to the next by some constant such as a CH2 group.  

A secretion in which the entire cell and its contents are extruded as a part of the secretory product, as in sebaceous glands.  

The testing of the biological or pharmacological properties of molecules by immersion in a large number of chemical baths or cellular systems. It is used, e.g., to determine whether any of a group of chemicals has specific therapeutic actions.  

Scoliosis due to habitually assumed improper posture or position.  

An ultrasonic dissecting device used in surgery to disrupt, disintegrate, or coagulate tissues, especially those with a high water or fat content. The device works by cavitating the tissues it contacts. When used laparoscopically, tissues destroyed by the scalpel are removed from the body by aspiration.  

A scale used to express the degree of acidity or alkalinity of a solution. It extends from 0.00 (total acidity) to 14 (total alkalinity), the numbers running in inverse order of hydrogen ion concentration. The pH value is the negative logarithm of the hydrogen ion concentration of a solution, expressed in moles per liter.  

A salt of hypochlorous acid used in household bleach and as an oxidizer, deodorant, and disinfectant.