dot positivity
dot positivity
A rarely used term of art referring to minimal positive staining of a particular antigen (in dots, hence the name) due to aggregation of staining material in the Golgi apparatus by immunohistochemistry, which serves to establish the cell’s lineage—e.g., T cells, Ewing sarcoma cells, fibrosarcoma, neuroblastoma, etc.Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.