<prompt> Raynauds phenomenon what change is seen in vessels initial stage:No changeThrombosisFibrinoid necrosisHyaline sclerosis  <response>: Ans. a No changeRef: Harrison 17th ed Table 243-1Most common cause of Raynauds Phenomenon -Primary or idiopathic.In initial stages of Raynauds phenomenon no changes is seen late stages may show atherosclerosis or thrombosis 