Two patients were successfully treated with interferon α-2b.
Gonciarz Z, Mazur W, Hartleb J, Machniak M, Bednarek I, Mazurek U, Wilczok T: Interferon alfa-2b induced long-term relief of pain in two patients with adiposis dolorosa and chronic hepatitis C. J Hepatol 1997, 27:1141.
*Case reports are generally considered a type of anecdotal evidence. Given their intrinsic methodological limitations, including lack of statistical sampling, case reports are placed at the foot of the hierarchy of clinical evidence, together with case series. https://en.wikipedia.org/wiki/Case_report