Phakomatosis
Pronunciation: fak-oh-mah-TOH-sis
Any of a group of neurocutaneous syndromes characterised by hamartomatous lesions affecting the skin, nervous system, and eyes, often presenting in childhood.
Full Definition
Phakomatosis (plural: phakomatoses; from Greek phakos, meaning 'lens' or 'lentil,' referencing lens-shaped lesions) encompasses hereditary neurocutaneous disorders including neurofibromatosis types 1 and 2, tuberous sclerosis complex, von Hippel–Lindau disease, and Sturge–Weber syndrome. These conditions share hamartomatous growth in ectodermal tissues and frequently require multidisciplinary management. In editorial contexts, the term is occasionally misspelled as 'phacomatosis' (both spellings are acceptable in international literature, but consistency within a document is paramount). The plural 'phakomatoses' must be used when referring to the group collectively.
Usage
Usage note: Both 'phakomatosis' and 'phacomatosis' are found in the literature; ensure consistency within a single document. Plural is 'phakomatoses.' Do not use interchangeably with 'genodermatosis,' which is a broader category.
In Context
- "The child's combination of ash-leaf macules and shagreen patches raised suspicion for tuberous sclerosis complex, a phakomatosis requiring multidisciplinary follow-up." — Paediatric neurology referral letter
- "The chapter on phakomatoses covered neurofibromatosis, tuberous sclerosis, and Sturge–Weber syndrome in successive sections." — Paediatric dermatology textbook