Dear Dr Badalyan- I found these images in on-line atlas of dermatopathology.
Jeff Silverman
Southside Hospital
Bay Shore NY USA


http://www.pathology.iupui.edu/drhood/lichenplanus.html


http://tray.dermatology.uiowa.edu/DPT/Hist/LNitid-001.jpg

http://tray.dermatology.uiowa.edu/DPT/Hist/LPlan-001.jpg