<prompt> True about Lucios phenomenon is?Associated with tuberculoid leprosyOccurs as side effect of treatment of leprosyIschemic necrosisAlso known as type 2 Lepra reaction  <response>: Ans. is c i.e., ischemic necrosisRef: IADVL 3de p. 2023,24Lucios phenomenon is seen in untreated cases of lepromatous leprosy.Lucios phenomenon is seen in lepromatous leprosy LL.It occurs in patients who are untreated.Patients develop recurrent crops of large sharply marginated, ulcerative lesions, paicularly on lower extremities. It is due to heavy parasitism of endothelial cell, endothelial proliferation and thrombus formation which lead to ischemic necrosis. 