Definitions provided in the MeSH (Medical Subject Headings) Database:
- Case Reports [Publication Type]: Clinical presentations that may be followed by evaluative studies that eventually lead to a diagnosis. Year introduced: 2008(1966)
- Rare Diseases: A large group of diseases which are characterized by a low prevalence in the population. They frequently are associated with problems in diagnosis and treatment. Year introduced: 2003
Neglected Diseases: Diseases that are underfunded and have low name recognition but are major burdens in less developed countries. The World Health Organization has designated six tropical infectious diseases as being neglected in industrialized countries that are endemic in many developing countries (HELMINTHIASIS; LEPROSY; LYMPHATIC FILARIASIS; ONCHOCERCIASIS; SCHISTOSOMIASIS; and TRACHOMA). Year introduced: 2011
Definition from the JAMAevidence Glossary:
- Case Study: In qualitative research, an exploration of a case defined by some boundaries or contemporary phenomena, usually within a real-life context.
- Case Series: A report of a study of a collection of patients treated in a similar manner, without a control group. For example, a clinician might describe the characteristics of an outcome for 25 consecutive patients with diabetes who received education for prevention of foot ulcers.