**Question:** Meig's syndrome consists of the following except -

A. Pleural effusion
B. Cisplatin chemotherapy
C. Thrombocytopenia
D. Pleural biopsy

**Core Concept:**
Meig's syndrome is a rare clinical entity characterized by the association of pleural effusion, ovarian cancer, and extrapleural symptoms. It is named after the German gynecologist, Emil Meigs, who first described the condition in 1924. Pleural effusion is a common manifestation of pleural diseases, including Meigs' syndrome.

**Why the Correct Answer is Right:**
Meig's syndrome is specifically characterized by the combination of pleural effusion, ovarian cancer, and extrapleural symptoms. Pleural biopsy is a procedure to obtain a tissue sample from the pleura for diagnostic purposes, which is not a part of Meig's syndrome. Pleural biopsy is a diagnostic tool used in pleural diseases, differentiating it from the diagnostic criteria of Meig's syndrome.

**Why Each Wrong Option is Incorrect:**

**Option A (Cisplatin chemotherapy):**
Cisplatin is a common chemotherapy drug used to treat various malignancies, including ovarian cancer, which is a key component of Meig's syndrome. Cisplatin is a treatment intervention and not a clinical manifestation of Meig's syndrome, making it the wrong choice.

**Option B (Pleural biopsy):**
As mentioned above, pleural biopsy is a diagnostic tool used to investigate pleural diseases. Pleural biopsy is not a component of Meig's syndrome and should not be present in the correct criteria.

**Option C (Thrombocytopenia):**
Thrombocytopenia refers to a decrease in platelet count, which is a potential side effect of cisplatin chemotherapy. While thrombocytopenia can be associated with ovarian cancer and chemotherapy, it is not a defining characteristic of Meig's syndrome.

**Clinical Pearl:**
Meig's syndrome is a clinical entity characterized by the triad of pleural effusion, ovarian cancer, and extrapleural symptoms. Although side effects of chemotherapy (like thrombocytopenia) and pleural biopsy are related to the management and investigation, they are not part of the essential criteria for Meig's syndrome. Cisplatin chemotherapy, while used in treating ovarian cancer, is not a core feature of Meig's syndrome.

By understanding these core components, students can differentiate Meig's syndrome from other pleural effusion cases and ovarian cancers. Meig's syndrome is a specific clinical entity, and its correct criteria should be adhered to for accurate diagnosis and differentiation from similar conditions.