Draining sinuses are seen in -a) Mycetomab) Scrofulac) Lupus vulgarisd) Pediculosis

**Core Concept**
Draining sinuses are a clinical manifestation of a chronic infection or inflammation that leads to the formation of a fistulous tract connecting the infected site to the skin surface. This phenomenon is commonly observed in conditions that cause granulomatous reactions or necrotic infections.

**Why the Correct Answer is Right**
The correct answer is related to Mycetoma, a chronic granulomatous infection caused by filamentous bacteria (Actinomadura, Nocardia, Streptomyces) or fungi (Madurella, Aspergillus). The infection leads to the formation of sinuses and fistulas, discharging the causative organism and debris. This process is a result of the body's attempt to eliminate the infectious agent through the skin surface.

**Why Each Wrong Option is Incorrect**
**Option A:** Scrofula is a form of tuberculosis that affects the lymph nodes of the neck, but it does not typically present with draining sinuses. Instead, it may cause lymphadenopathy, fever, and weight loss.
**Option B:** Lupus vulgaris is a form of cutaneous tuberculosis that can cause skin lesions, but it does not typically present with draining sinuses.
**Option C:** Pediculosis is an infestation of the skin with lice, which can cause pruritus, but it does not lead to the formation of draining sinuses.

**Clinical Pearl / High-Yield Fact**
Remember that draining sinuses are a hallmark of chronic infections, particularly those caused by granulomatous organisms like Actinomadura and Madurella. This clinical finding should prompt the physician to consider a diagnosis of mycetoma in patients with chronic skin infections.

**Correct Answer:** A. Mycetoma