I think the condition you are referring here could be "Lupus
Profundus" or " Lupus Panniculitis". i.e lupus affecting the fat underlying the skin. Inflammation of the fat cells may initially appear as firm nodules. Later the fat cells are completely destroyed by the lupus leading to dents/scars
Hope I have answered your question.
Have a nice day :)
Dr. Divya Kuttikrishnan