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Club foot
Clostridium difficile (klos-TRID-e-um dif-uh-SEEL), also known as Clostridioides difficile and often referred to as Cdifficile or C. diff, is a bacterium that can cause symptoms ranging from diarrhea to life-threatening inflammation of the colon.
Clostridium difficile
Inflammation of the colon caused by the bacteria Clostridium difficile.
Clostridium difficile colitis results from disruption of normal, healthy bacteria in the colon, often as a result of antibiotics. C. difficile can also be transmitted from person to person by spores. It can cause severe damage to the colon and even be fatal.
Symptoms include diarrhoea, stomach pain and fever.
Treatment includes antibiotics. Even when treated with antibiotics, the infection may come back. In rare cases, faecal transplant or surgery may be needed.
Clinical trials
Clinical trials are research studies intended to answer scientific questions and find better ways to treat or prevent diseases. All drugs enter the clinic via proof-of-concept trials, small-scale studies designed to get an early read on a drug’s safety and effectiveness, and to help find and advance the most promising drug candidates. Wherever possible, especially when molecular pathways are shared, several diseases are explored in parallel. If the proof-of-concept study is successful, a medicine typically moves into full clinical development.
Clinical depression
A mental health disorder characterised by persistently depressed mood or loss of interest in activities, causing significant impairment in daily life.
Possible causes include a combination of biological, psychological and social sources of distress. Increasingly, research suggests that these factors may cause changes in brain function, including altered activity of certain neural circuits in the brain.
Cleft lip and palate

Cleft lip and cleft palate are openings or splits in the upper lip, the roof of the mouth (palate) or both. Cleft lip and cleft palate result when facial structures that are developing in an unborn baby don't close completely.

Cleft lip and cleft palate are among the most common birth defects. They most commonly occur as isolated birth defects but are also associated with many inherited genetic conditions or syndromes.

Claustrophobia
Claustrophobia is a situational phobia triggered by an irrational and intense fear of tight or crowded spaces. It can be triggered by things like being locked in a windowless room, being stuck in a crowded elevator, or driving on a congested highway. Claustrophobia is one of the most common phobias.