A 60-year-old male with a...

A 60-year-old male with a mixed diet presented with a history of easy fatiguability, malaise, and low-grade fever spikes in the evening over the last 20 days. He also reported a loss of appetite and decreased body weight. He had a previous history of pulmonary tuberculosis (PTB) 20 years ago, for which he completed a course of anti-tuberculosis treatment (AKT). CXR was s/o old infective etiology. A chest X-ray revealed indications of a previous infectious cause. A complete blood count (CBC) showed pancytopenia, with a hemoglobin level of 5.8 g/dL, a white blood cell count of 3200/cumm, a platelet count of 112,000/cumm, and an MCV of 105fL. Both the erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) levels were elevated. Vitamin B12 levels were measured at 150. Renal and liver function tests were within normal limits. A contrast-enhanced CT scan of the abdomen and pelvis revealed thickening of the bowel wall at the junction between the small and large intestines, along with a raised cecum and appendix. Additionally, a few small para-aortic lymph nodes were observed, and there were enlarged necrotic lymph nodes on both sides of the armpits.