Bursa involved in clergyman’s knee –
**Core Concept**
The clergyman's knee refers to a specific type of prepatellar bursitis, characterized by inflammation of a bursa located in front of the kneecap (patella). This condition is often caused by repeated pressure on the knee, leading to friction and irritation of the bursa.
**Why the Correct Answer is Right**
The prepatellar bursa is a lubricating sac that reduces friction between the patella and the skin in front of it. Inflammation of this bursa occurs when the knee is subjected to repetitive pressure, such as in activities requiring frequent kneeling, like gardening or carpentry. The resulting friction and irritation lead to swelling, pain, and warmth in the affected area.
**Why Each Wrong Option is Incorrect**
**Option A:** The infrapatellar bursa, also known as the deep infrapatellar bursa, is involved in a different type of knee injury, known as infrapatellar tendinopathy or Sinding-Larsen-Johansson syndrome.
**Option B:** The suprapatellar bursa is a fluid-filled sac located above the patella, and its inflammation is known as suprapatellar bursitis. While it can cause knee pain, it is not associated with the clergyman's knee.
**Option C:** The pes anserine bursa is located on the lower inner aspect of the knee and is prone to inflammation, especially in individuals with flat feet or other lower limb abnormalities.
**Option D:** The iliotibial (IT) band bursa is a fluid-filled sac that reduces friction between the IT band and the lateral femoral condyle. Its inflammation is known as iliotibial band syndrome, which primarily affects runners and cyclists.
**Clinical Pearl / High-Yield Fact**
The clergyman's knee is often seen in individuals with occupations that require frequent kneeling, such as gardeners, carpenters, and athletes who participate in sports like soccer, basketball, or football. This condition can be prevented or managed with proper knee support, padding, and regular breaks during activities that involve repetitive knee pressure.
**Correct Answer:** C. The pes anserine bursa is not the correct answer as it is not the bursa involved in clergyman's knee.