<prompt> This patient presented with fatigue, fever, anorexia, and weight loss. What is the most likely diagnosis?LeukemiaScurvyAcquired immunodeficiency syndromeSarcoidosis  <response>: Answer A. LeukemiaGingival infiltration in a patient with fever, fatigue, and weight loss is most suggestive of acute leukemia, especially monocytic variants of acute myelogenous leukemia. This patients gingival infiltration resolved after treatment for acute myelomonocytic leukemia. 