What is the most likely cause of this presentation?: (A) Chemotherapy, (B) Hyperthyroidism, (C) Nephrotic syndrome, (D) Psoriasis
Answer is A. Answer A. ChemotherapyThese multiple white lines on the fingernails, known as Beau's lines, correspond with chemotherapy cycles in this patient with gastric cancer. Cytotoxic chemotherapeutic agents can induce the temporary arrest of proliferative function of the nail matrix.