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Definition of melanosis in English: melanosisnoun ˌmɛləˈnəʊsɪsˌmɛləˈnoʊsəs mass nounMedicine A condition of excessive production of melanin in the skin or other tissue. 〔医〕黑变（病），黑素沉着病 Example sentencesExamples - Beyond this observation in 4 patients, we know of no other reports in the English literature of melanosis pigment in the pericolonic lymph nodes of patients with melanosis coli.
- Erythema toxicum neonatorum, transient neonatal pustular melanosis, sucking blister, miliaria, and mongolian spots are among the many benign skin conditions that can occur in newborns.
- A punch biopsy at the border of the lesion is necessary to rule out melanosis secondary to malignant melanoma that manifests as a generalized blue-gray skin discoloration.
- Various types of skin manifestations of arsenic toxicity were observed - from melanosis, keratosis, hyperkeratosis, dorsal keratosis, and nonpitting edema, to gangrene and cancer.
- Adrenal insufficiency was suspected when five of the following features were present: weight loss, general weakness, anorexia, diarrhoea, melanosis, postural hypotension, hyponatraemia and hyperkalaemia.
Derivativesadjective ˌmɛləˈnɒtɪk Medicine Therefore, a final diagnosis of melanotic pleomorphic xanthoastrocytoma was made. Example sentencesExamples - Lentigo maligna (Hutchinson's melanotic freckle), discussed above, is commonly located in sun-damaged areas on the heads and necks of elderly persons.
- Of the 9 metastatic melanomas, 5 were melanotic and 4 were amelanotic.
- About 1% of all newborns have a congenital melanotic (black pigmented) nevus or birthmark.
- Mr. Sailors, a 43-year-old man who is in otherwise good health, presents to the emergency department with a single episode of coffee-ground emesis and a large melanotic stool that morning.
OriginEarly 19th century: modern Latin, from Greek melas, melan- 'black' + -osis. Definition of melanosis in US English: melanosisnounˌmɛləˈnoʊsəsˌmeləˈnōsəs Medicine A condition of abnormal or excessive production of melanin in the skin or other tissue. 〔医〕黑变（病），黑素沉着病 Example sentencesExamples - Various types of skin manifestations of arsenic toxicity were observed - from melanosis, keratosis, hyperkeratosis, dorsal keratosis, and nonpitting edema, to gangrene and cancer.
- A punch biopsy at the border of the lesion is necessary to rule out melanosis secondary to malignant melanoma that manifests as a generalized blue-gray skin discoloration.
- Adrenal insufficiency was suspected when five of the following features were present: weight loss, general weakness, anorexia, diarrhoea, melanosis, postural hypotension, hyponatraemia and hyperkalaemia.
- Erythema toxicum neonatorum, transient neonatal pustular melanosis, sucking blister, miliaria, and mongolian spots are among the many benign skin conditions that can occur in newborns.
- Beyond this observation in 4 patients, we know of no other reports in the English literature of melanosis pigment in the pericolonic lymph nodes of patients with melanosis coli.
OriginEarly 19th century: modern Latin, from Greek melas, melan- ‘black’ + -osis. |