Advanced case of abdominal tuberculous infection predominantly characterized by the typical low-attenuation adenopathy, with numerous bulky retroperitoneal and pelvic sidewall lymph nodes and numerous smaller mesenteric lymph nodes. 

The reason for leg swelling is due to mass effect on the iliac veins (right worse than left). 

Ascites and small bowel inflammation indicate an element of peritonitis/wet TB. 

Small subligamentous abscess along the right lower thoracic spine is typical for early Pott disease.