https://www.vetsurgeon.org/f/clinical-questions/10020/proliferative-thrombovascular-necrosis-of-the-pinna Anybody had a case? How did it turn out? Inherited a case, 12yo JRT with non-healing ulcerative lesions close to pinnal tips. Started on one ear, then t&#39;other. Resected both pinnal tips with at least 2cm margins, and sent off. Pathologist admitteden-USTelligent Community 10https://www.vetsurgeon.org/thread/50527?ContentTypeID=1Fri, 02 Dec 2011 23:02:47 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:269b33a0-ddda-480d-944b-bcb5f6b4ac1eAnonymous<p>Interesting case.</p> <p>Never treated one, but last recommendation from dermatologist I came across was pentoxyfylline (which I&#39;d guess bares as many similarities to vivitonin as it does to vetmedin, corvental and viagra - i.e. it&#39;s pharmacological mechanisms of action in dogs are probably poorly understood and it&#39;s vaguely classed as a &#39;phophodiesterase inhibitor&#39;) at 20-30mg/kg q12hrs, which is somewhat higher and less frequent than other textbook recommendations, in addition to some steroids and, failing that, surgery.</p> <p>I think some have linked it to vaccination - doubt any conclusive link, but may be worth not vaccinating the dog any more unless risk-assessment suggests it really needs these?</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/50520?ContentTypeID=1Fri, 02 Dec 2011 21:05:57 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:a0cbad24-0098-4992-a2cd-b8ffd5b8b788Rachael Winder<p>A friend who is also a vet had this with her lurcher. She just resected the pinna with a hefty margin and it did fine. Don&#39;t think she really realised what it was until afetr she&#39;d fixed it!</p><div style="clear:both;"></div>