<prompt> Marjolin ulcerCa in marjolins is squamous cell caChronic venous insufficiencyBasal cell carcinomaarise from base of the ulcer  <response>: .marjolin;s ulcer is the name given to a malignancy usually a squamous cell carcinoma which arise in any long standing wound or a scar mostly scar of an old burn it grows slowly as it is avascular it is painless 