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Items: 3

1.

Major depressive disorder

Marked depression appearing in the involution period and characterized by hallucinations, delusions, paranoia, and agitation. [from MeSH]

MedGen UID:
266123
Concept ID:
C1269683
Mental or Behavioral Dysfunction
2.

Seasonal affective disorder

Some people experience a serious mood change during the winter months, when there is less natural sunlight. This condition is called seasonal affective disorder, or SAD. SAD is a type of depression. It usually lifts during spring and summer. . Not everyone with SAD has the same symptoms. They include. -Sad, anxious or empty feelings. -Feelings of hopelessness and/or pessimism. -Feelings of guilt, worthlessness or helplessness. -Irritability, restlessness. -Loss of interest or pleasure in activities you used to enjoy. -Fatigue and decreased energy. -Difficulty concentrating, remembering details and making decisions. -Difficulty sleeping or oversleeping. -Changes in weight. -Thoughts of death or suicide. SAD may be effectively treated with light therapy. But nearly half of people with SAD do not respond to light therapy alone. Antidepressant medicines and talk therapy can reduce SAD symptoms, either alone or combined with light therapy. NIH: National Institute of Mental Health.  [from MedlinePlus]

MedGen UID:
38984
Concept ID:
C0085159
Mental or Behavioral Dysfunction
3.

Unipolar Depression

A mood disorder having a clinical course involving one or more episodes of serious psychological depression that last two or more weeks each, do not have intervening episodes of mania or hypomania, and are characterized by a loss of interest or pleasure in almost all activities and by some or all of disturbances of appetite, sleep, or psychomotor functioning, a decrease in energy, difficulties in thinking or making decisions, loss of self-esteem or feelings of guilt, and suicidal thoughts or attempts.(Dictionary.com) [from NCI]

MedGen UID:
22552
Concept ID:
C0041696
Mental or Behavioral Dysfunction
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