MSFinals-2340
A 52-year-old woman presented with abdominal pain, fever and weight loss. Abdominal imaging revealed multiple retroperitoneal lymph nodes. She was diagnosed with intestinal tuberculosis and received a full drug regimen for six months. However, after completion of treatment, her symptoms remain. She presents to us with a body weight of 38 kg. There is angular stomatitis and diffuse loss of hair. She looks tanned. Repeat abdominal imaging reveals persistence of the lymph nodes. Her son, who accompanied her, complains that his mother is becoming listless and she has even given up her favourite hobby of Sudoku. She also has a few involuntary movements of her face, such as chewing.
Which of the following is the most likely diagnosis?