hey guys it's Ryan in this video we're gonna continue to talk about oral pathology and this time we're gonna move from benign connective tissue tumors to malignant connective tissue tumors and most of these are a malignant conversion of the previous lesions we just talked about so you may recognize a lot of similar sounding names but with the addition of sarcoma at the end so if you remember back to when we talked about malignant mucosal lesions we were talking about carcinomas is there epithelial in origin and now that we're deeper and talking about some mucosa we're gonna use the root sarcoma at the end of each of these lesions so first we have fibrosarcoma and this is the malignant proliferation of fibroblasts so you'll notice that a lot of these connective tissue tumors or lumps and bumps as I call them look kind of similar just on a spectrum of severity some being smaller and some being larger so I'm not going to include pictures for all these lesions for that reason but the most important thing to know for each of these malignant connective tissue tumors is this cell that's involved in a neoplasm in terms of an exam like the part 2 boards next we have neuro fibrosarcoma which is also known as a malignant peripheral nerve sheath tumor and this is a malignant proliferation of Schwann cells so fibrosarcoma we had fibroblasts and now we have Schwann cells next we have Kaposi sarcoma which is a malignant proliferation of endothelial cells and endothelium is what lines the inside of various organs including the blood and lymphatic vessels and it's caused by human herpes virus 8 and most commonly seen as a complication of AIDS and I'm gonna go back on my word and this one I do have a picture because unlike the other ones we're gonna talk about in the video this has a very characteristic and you Niq appearance clinically so it's this deep purple lesion here we have it on the inside of the hard palate and anything purple is usually nine times out of ten associated with Kaposi sarcoma it's just a very characteristic color and often test makers like to make that link and lastly we have three three more malignant connective tissue tumors that we want to want to cover and the first is leiomyosarcoma which if we're picking apart the roots here is a malignancy of smooth muscle cells we have rhabdomyosarcoma simal ignacy of skeletal muscle cells and lastly we have a malignancy of fat cells and here's a slide from my previous video on benign connective tissue tumors and you might notice how similar these names are and they have the exact same cell of origin so really you just have to memorize the benign ones and you'll have the malignant ones memorize then too so that's a nice little twist to have in terms of studying for these tumors so that's actually all for this video guys thanks again for watching if you like this video please leave a like on the video and subscribe to my channel if you haven't already for more oral pathology and other things dentistry thanks again for watching guys and I'll see you all in the next video