A patient with a malignant, primary neoplasm of the pylorus has been receiving chemotherapy and develops dehydration as a side effect of the chemotherapy. The encounter is only for treatment of the dehydration. Report:
a) T51.9X5A Adverse effect of unspecified drugs, medicaments, and biological substances, initial encounter
b) K31.1 Atrophic gastritis
c) E87.1 Hypo-osmolality and hyponatremia
d) Z51.11 Encounter for antineoplastic chemotherapy