**Question:** All are causes of chronic granulomatous uveitis except:

A. Vogt-Koyanagi-Harada disease (VKH)
B. Behcet's disease
C. Tuberculosis
D. Sarcoidosis

**Core Concept:** Chronic granulomatous uveitis is a group of uveitis conditions characterized by granuloma formation and chronic inflammation within the eye. It is classified into infectious (e.g., tuberculosis), non-infectious (e.g., sarcoidosis), and idiopathic causes (e.g., VKH and Behcet's disease).

**Why the Correct Answer is Right:** Option A (Vogt-Koyanagi-Harada disease, VKH) is a non-infectious cause of chronic granulomatous uveitis, characterized by bilateral panuveitis, vitritis, and serous retinal detachment. While VKH can be granulomatous, it is not considered a primary granulomatous disease.

Option B (Behcet's disease) is also a non-infectious cause of uveitis. Behcet's disease is a chronic multisystem disorder characterized by recurrent oral ulcers, genital ulcers, and ocular inflammation. It is not granulomatous and is distinct from chronic granulomatous uveitis.

Option C (Tuberculosis) is primarily a granulomatous infection caused by the bacteria Mycobacterium tuberculosis, leading to chronic granulomatous uveitis in susceptible individuals.

Option D (Sarcoidosis) is a non-infectious cause of granulomatous inflammation, affecting multiple organs including the eye. While it may present with uveitis, it is not specifically classified as chronic granulomatous uveitis.

**Why Each Wrong Option is Incorrect:**

Option A (VKH) is not granulomatous, making it an incorrect cause of chronic granulomatous uveitis.

Option B (Behcet's disease) is a distinct entity with recurrent oral and genital ulcers, and ocular inflammation, but is not granulomatous and is not a cause of chronic granulomatous uveitis.

Option C (Tuberculosis) is a granulomatous infection leading to chronic granulomatous uveitis in susceptible individuals.

Option D (Sarcoidosis) is a non-infectious granulomatous disease affecting multiple organs including the eye, but is not specifically classified as chronic granulomatous uveitis.

**Clinical Pearls:**

1. Chronic granulomatous uveitis is typically caused by infectious agents like tuberculosis.
2. Behcet's disease and sarcoidosis are non-infectious granulomatous diseases affecting multiple organs, but are not specifically classified as chronic granulomatous uveitis.
3. VKH is a non-granulomatous disorder, making it an incorrect cause of chronic granulomatous uveitis.

**Why Correct Answer is