A 23-year old female pateint presents with 2 months history of low grade fever and moderate right-sided pleural effusion. Pleural fluid shows lymphocyte predominance with ADA levels of 120IU/L. The patient is staed on anti-tubercular therapy (WHO catergory 1). Two months later the patient presents with progressive breathlessness, generalized body swelling and raised JVP. Pleural fluid is now predominantyl transudate. This patient is liekly to have developed-

**Core Concept**
The patient is presenting with a complication of tuberculosis (TB) treatment, specifically the development of a parapneumonic effusion or fibrosing pleurisy, leading to restrictive lung disease and possibly cardiac involvement.

**Why the Correct Answer is Right**
The patient initially presented with lymphocyte-predominant pleural effusion and elevated adenosine deaminase (ADA) levels, consistent with tuberculous pleuritis. However, after starting anti-tubercular therapy (ATT), the patient develops progressive breathlessness, generalized body swelling, and raised jugular venous pressure (JVP), indicating fluid overload and possible cardiac involvement. The pleural fluid has transitioned to a transudate, suggesting a shift from a lymphocytic to a hydrostatic fluid accumulation. This pattern is suggestive of constrictive pericarditis, a known but rare complication of TB treatment, particularly in young women.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not account for the change in pleural fluid characteristics from lymphocyte-predominant to transudative.

**Option B:** This option is incorrect as it does not explain the development of cardiac symptoms and fluid overload.

**Option C:** This option is incorrect as it does not account for the patient's response to ATT and the transition of pleural fluid characteristics.

**Clinical Pearl / High-Yield Fact**
Constrictive pericarditis is a rare but serious complication of TB treatment, particularly in young women, and requires prompt recognition and management to prevent further cardiac complications.

**Correct Answer:** C. Constrictive pericarditis.

✓ Correct Answer: D. Constrictive pericarditis