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Query: UMLS:C0027819 (neuroblastoma)
 27,800 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Neurofibroma and neuroblastoma both arise from the neural crest, and there has long been speculation regarding a pathogenetic relationship between them. Clinical characteristics do not necessarily distinguish these tumors, therefore the diagnosis of neuroblastoma should be considered in all children with neurofibromatosis 1 (NF-1) who have a rapidly growing or inaccessible mass. A careful physical examination, imaging studies, and urinary catecholamine measurement are indicated. In a child with NF-1 and malignancy, direct tissue examination may be necessary to differentiate malignant from nonmalignant tumor and guide therapy. Furthermore, with the significantly increased risk of certain types of childhood cancer in these patients, we recommend evaluation for this common heritable condition in all patients with malignancy.
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PMID:Neurofibromatosis 1: recognition and management of associated neuroblastoma. 212 42

Neurofibroma type 1 tissue was investigated for the presence of growth-promoting activity on human neuroblastoma cells. The activity was isolated by gel filtration and reversed-phase column chromatographs from neurofibroma type 1 extracts. An adenosine-containing dinucleotide (adenylyl(3'-5')cytidine-3'-phosphate) was identified as one of the major components of the activities by its enzymatic fragmentation and liquid chromatography/mass spectrometry. Synthetic adenosine-containing dinucleotide derivatives such as cytidyl(3'-5')adenosine, cytidyl(2'-5')adenosine, adenylyl(3'-5')cytidine, and adenylyl(2'-5')cytidine showed a similar action. Cytidyl(3'-5')adenosine, cytidyl(2'-5')adenosine, and adenylyl(2'-5')cytidine, which are able to release a free adenosine through enzymatic hydrolysis, in particular elicited a strong activity corresponding to that of adenosine with the highest action. These results suggest that neuroblastoma cells are able to use adenosine-containing dinucleotides as well as mononucleotides for their survival and proliferation.
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PMID:Growth-promoting action of adenosine-containing dinucleotide on neuroblastoma cells: detection of adenosine-cytidine dinucleotide (ApCp) in neurofibroma (NF1) extracts. 837 96