Glossary

Browse through glands, hormones and endocrine conditions.
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Dehydroepiandrosterone

Dehydroepiandrosterone is an important precursor hormone, and is the most abundant circulating steroid present in the human body. It has little biological effect on its own but has powerful effects when converted into other hormones such as sex steroids.

deep vein thrombosis

(DVT) a condition that occurs when a blood clot forms in a deep vein, usually in the leg or thigh. The blood clot can break off into the bloodstream and cause obstruction in other organs.

Dihydrotestosterone

Dihydrotestosterone, a hormone with powerful androgenic actions, causes the body to mature during puberty and is responsible for many of the physical characteristics associated with adult males.

Diabetes insipidus

Diabetes insipidus (water diabetes) is caused by a reduction in, or failure to respond to, anti-diuretic hormone. This results in passing too much dilute urine and increased thirst.

Diabetes mellitus

Diabetes mellitus is a very common disorder caused by high levels of sugar in the bloodstream. It affects a large number of people, with many more people remaining undiagnosed.

Delayed puberty

Delayed puberty is defined as no secondary sexual maturation or any sign of puberty by the age of 13 years in girls and 14 years in boys.

dehydration

occurs when the body loses more fluid than it takes in; e.g. due to excess fluid loss, inadequate fluid intake, sweating during physical activity, fever, vomiting or diarrhoea. Symptoms include headache, tiredness, dry mouth and dizziness.

depression

a disorder characterised by feelings of exhaustion, sadness and worthlessness. Patients can experience insomnia, loss of appetite and suicidal thoughts.

DNA

the hereditary material that makes up our genes and is passed on to the next generation. DNA, which stands for 'deoxyribonucleic acid', is found coiled up as chromosomes in the nucleus of each cell in our body.


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