“…For the diagnosis of systemic PAN, the patient must meet at least three of the following American College of Rheumatology criteria, at the same time: weight loss greater than 4 kg, livedo, testicular pain, myalgia, mononeuropathy, diastolic blood pressure greater than 90mmHg, increased serum urea or creatinine, hepatitis B, abnormal arteriography or compatible histological changes. [1][2][3] Cutaneous polyarteritis nodosa seems to be a skin limited form of PAN. Clinically, the cutaneous form lesions may present as erythematous nodules, which may ulcerate, and livedo reticularis, especially in the lower limbs.…”