RT Book, Section
A1 Lichtman, Marshall A.
A1 Kaushansky, Kenneth
A1 Kipps, Thomas J.
A1 Prchal, Josef T.
A1 Levi, Marcel M.
SR Print(0)
ID 1126654548
T1 The Vascular Purpuras
T2 Williams Manual of Hematology, 8e
YR 2011
FD 2011
PB McGraw-Hill Education
PP New York, NY
SN 9780071622424
LK hemonc.mhmedical.com/content.aspx?aid=1126654548
RD 2024/04/19
AB Purpura  is  the  extravasation  of  red  cells  from  vasculature  into  the  skin  and/or  subcutaneous  tissues.Petechiae  are  lesions  less  than  2  mm  in  diameter.Purpura  describes  lesions  2  mm  to  1  cm.Ecchymoses  are  lesions  greater  than  1  cm.Erythema  is  reddened  skin  due  to  increased  capillary  flow.Telangiectasia  is  dilated  superficial  capillaries.Erythema  and  telangiectasia  blanch  with  pressure.  This  can  be  easily  demonstrable  with  a  glass  microscope  slide.