“…Indeed, two patients in their study who had no evident systemic process occurring at the time of skin biopsy were eventually diagnosed with IH. Regarding associations with systemic disease, rheumatoid arthritis is the most common disease association [76][77][78][79][80][81][82][83][84][85], but IH has also been reported in osteoarthritis [86,87], Merkel cell carcinoma [81], mastectomy sites [81,88], joint replacements and metal implants [81,84,[88][89][90], breast implants [91], melanoma [81], Klippel-Trenaunay syndrome [81], Crohn's disease [76], cellulitis [92], and genital swelling and necrosis [84,93].…”