Yes, my understanding is: clinical features of inflammatory breast cancer are present + biopsy confirms cancer (regardless of intralymphatic tumor present or not) = inflammatory breast cancer

From pathologic viewpoint, the tumor should be present in lymphovscular spaces of skin and nipple, and that's the reason why the tumor is called 'Inflammatory' breast cancer. Because the skin is involved, it looks red and edematous...

In some references dermal lymphatic invasion is present in

Here is a good reference web: http://www.pathologyoutlines.com/topic/breastmalignantinflamcar.html

Thanks for the reference web