“…Disorders to consider in the setting of a palmar rash with neuropathy include Crohn disease, psoriasis, toxins such as arsenic (which can cause palmar hyperkeratosis), infections such as syphilis and human T-lymphotropic virus-1 (HTLV-1), vasculitides such as polyarteritis nodosa, and chemotherapeutic agents such as vincristine. [1][2][3][4][5] Other systemic issues that could be responsible for palmar erythema, but unrelated to the neuropathy, include rheumatoid arthritis, cirrhosis, and drug eruptions. ª 2017 American Academy of Neurology.…”