Biomaterial Database

Subcutaneous fat necrosis of the newborn: light, ultrastructural and histochemical microscopic studies. 1989

S J Friedman, and R K Winkelmann

Department of Dermatology, Mayo Clinic, Rochester, MN 55905.

Multiple subcutaneous plaques and nodules appeared on the back and the dorsal proximal area of the extremities of a 9-day-old male infant after a complicated prenatal period necessitating cesarean section. The clinical and histological features were diagnostic of subcutaneous fat necrosis of the newborn. Light microscopy revealed adipocyte necrosis, a lymphohistiocytic infiltrate, and needle-shaped clefts within adipocytes and macrophages. Ultrastructurally, there were aggregations of electron-lucent spaces in the form of spindles and needles arranged in parallel within the altered adipocytes; macrophages surrounded these cells or their fragments and invaded the fat lobules. Enzyme histochemical staining, not previously reported in the literature, showed that acid phosphatase, leucine aminopeptidase, and indoxyl and non-specific esterases were present in the areas of fat necrosis.

UI	MeSH Term	Description	Entries
D007211	Indoles	Benzopyrroles with the nitrogen at the number one carbon adjacent to the benzyl portion, in contrast to ISOINDOLES which have the nitrogen away from the six-membered ring.
D007231	Infant, Newborn	An infant during the first 28 days after birth.	Neonate,Newborns,Infants, Newborn,Neonates,Newborn,Newborn Infant,Newborn Infants
D007232	Infant, Newborn, Diseases	Diseases of newborn infants present at birth (congenital) or developing within the first month of birth. It does not include hereditary diseases not manifesting at birth or within the first 30 days of life nor does it include inborn errors of metabolism. Both HEREDITARY DISEASES and METABOLISM, INBORN ERRORS are available as general concepts.	Neonatal Diseases,Disease, Neonatal,Diseases, Neonatal,Neonatal Disease
D007931	Leucyl Aminopeptidase	A zinc containing enzyme of the hydrolase class that catalyzes the removal of the N-terminal amino acid from most L-peptides, particularly those with N-terminal leucine residues but not those with N-terminal lysine or arginine residues. This occurs in tissue cell cytosol, with high activity in the duodenum, liver, and kidney. The activity of this enzyme is commonly assayed using a leucine arylamide chromogenic substrate such as leucyl beta-naphthylamide.	Cytosol Aminopeptidase,Leucine Aminopeptidase,L-Leucylnaphthylamidase,Methoxyleucine Aminopeptidase,Peptidase S,Zinc-Manganese-Leucine Aminopeptidase,Aminopeptidase, Cytosol,Aminopeptidase, Leucine,Aminopeptidase, Leucyl,Aminopeptidase, Methoxyleucine,Aminopeptidase, Zinc-Manganese-Leucine,Zinc Manganese Leucine Aminopeptidase
D008297	Male		Males
D008854	Microscopy, Electron	Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.	Electron Microscopy
D009336	Necrosis	The death of cells in an organ or tissue due to disease, injury or failure of the blood supply.
D002265	Carboxylic Ester Hydrolases	Enzymes which catalyze the hydrolysis of carboxylic acid esters with the formation of an alcohol and a carboxylic acid anion.	Carboxylesterases,Ester Hydrolases, Carboxylic,Hydrolases, Carboxylic Ester
D006651	Histocytochemistry	Study of intracellular distribution of chemicals, reaction sites, enzymes, etc., by means of staining reactions, radioactive isotope uptake, selective metal distribution in electron microscopy, or other methods.	Cytochemistry
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man