Which of the following is true about skeletal tuberculosis in children?
**Core Concept**
Skeletal tuberculosis (TB) in children is a rare but serious form of extrapulmonary TB that affects the bones and joints, often causing destruction and deformity. It typically presents in the spine, hips, or knees, and can be associated with systemic symptoms such as fever, weight loss, and fatigue.
**Why the Correct Answer is Right**
Skeletal TB in children is most commonly caused by the hematogenous spread of Mycobacterium tuberculosis from a primary pulmonary focus. The bacteria infect the metaphyseal region of long bones and the vertebral bodies, leading to caseous necrosis and granuloma formation. In children, skeletal TB often presents as a destructive lesion with little or no systemic symptoms, making it challenging to diagnose.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because skeletal TB in children typically does not present as a painless, localized mass.
**Option B:** Incorrect because while TB can affect the joints, it is not the most common site of skeletal TB in children.
**Option C:** Incorrect because TB osteomyelitis is a form of skeletal TB, but it is not the most characteristic presentation in children.
**Clinical Pearl / High-Yield Fact**
In children, skeletal TB often presents as a destructive lesion of the spine, hips, or knees, and can be associated with systemic symptoms such as fever, weight loss, and fatigue. A high index of suspicion and a thorough radiological evaluation are essential for early diagnosis and treatment.
**Correct Answer:** C.