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Conjunctivitis is a very common eye infection. It involves the inflammation (swelling) of the conjunctiva which is the thin delicate membrane that covers the whites of the eyes and lines the inside of the eyelids.

Cortisol deficiency

Find out more about cortisol deficiency and how it is treated. This page also contains information from Great Ormond Street Hospital (GOSH) about how to deal with illnesses, accidents and other stressful events in children on cortisol replacement.

Cranio-fronto-nasal dysplasia

Cranio-fronto-nasal dysplasia is a type of craniosynostosis. The name describes the parts of the skull and face affected. This information sheet from Great Ormond Street Hospital (GOSH) explains the causes, symptoms and treatment of cranio-fronto-nasal dysplasia (also known as cranio-fronto-nasal dysostosis) and where to get help.

Craniofacial microsomia

Craniofacial microsomia is a condition where one or both sides of the face (facial) is underdeveloped (microsomia). This information sheet from Great Ormond Street Hospital (GOSH) explains the causes, symptoms and treatment of craniofacial microsomia (also known as hemifacial microsomia or Goldenhar syndrome) and where to get help.

Crouzon syndrome

Crouzon syndrome is the most common type of complex craniosynostosis. It is named after the doctor who first described it in the early 20th Century. This page from Great Ormond Street Hospital (GOSH) explains the causes, symptoms and treatment of Crouzon syndrome and where to get help.

Cutaneous mastocytosis

Cutaneous mastocytosis is a condition characterised by increased numbers of mast cells in the skin. Mast cells are part of the immune system.This page from Great Ormond Street Hospital (GOSH) explains the causes, symptoms and treatment of cutaneous mastocytosis and where to get help.

Cutis aplasia

Cutis aplasia means ‘missing skin’ and is a congenital (present at birth) condition where a section of skin, usually on the scalp, is missing. This page explains the condition called cutis aplasia, what causes it and how it can be treated. It also outlines what you can expect when a child comes to Great Ormond Street Hospital (GOSH) for assessment and treatment.