The Great Pretender: Unmasking Persistent Inflammation as Whipple's Disease.

Whipple's disease is a rare and chronic multisystem infection caused by Tropheryma whipplei. Its protean and often nonspecific clinical manifestations frequently delay diagnosis, increasing the risk of irreversible organ damage. A 54-year-old man was referred for evaluation of persistently elevated inflammatory markers and iron-deficiency anemia. He was initially asymptomatic but subsequently developed intermittent fever, unintentional weight loss, and occasional nausea, vomiting, and diarrhea. A CT revealed retroperitoneal lymphadenopathy. Upper gastrointestinal endoscopy demonstrated diffusely edematous duodenal mucosa with a characteristic pearly appearance. Histopathological examination of duodenal biopsies, supported by PCR testing, confirmed T. whipplei infection. Tests for neurological and cardiac involvement showed no abnormalities. The patient was treated with intravenous ceftriaxone followed by oral doxycycline and hydroxychloroquine, resulting in normalization of inflammatory markers, resolution of iron-deficiency anemia, sustained clinical recovery, and complete endoscopic remission. This case illustrates that Whipple's disease may initially present with persistent systemic inflammation and iron-deficiency anemia before other significant symptoms arise. Recognizing these unusual features may help enable earlier diagnosis and treatment, preventing irreversible organ damage.