Genu recurvatum is seen in –
**Core Concept**
Genu recurvatum is a rare knee deformity characterized by an involuntary hyperextension of the knee joint, often resulting from a combination of muscle imbalances and bony malalignment. This condition can be congenital or acquired, with various underlying causes such as cerebral palsy, spina bifida, or knee injuries.
**Why the Correct Answer is Right**
In genu recurvatum, the hamstrings and quadriceps muscles are disproportionately weak or tight, leading to an abnormal gait and posture. The tibia and femur are also malaligned, causing the knee to hyperextend. This deformity can be exacerbated by conditions that affect motor control, such as cerebral palsy or spina bifida.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because genu recurvatum is not typically associated with patellofemoral pain syndrome, which is characterized by pain and inflammation around the kneecap.
**Option B:** This option is incorrect because genu varum (bowleggedness) is a different knee deformity, often caused by conditions such as rickets or osteomalacia.
**Option C:** This option is incorrect because genu valgum (knock-kneedness) is another distinct knee deformity, frequently resulting from conditions like rickets or obesity.
**Clinical Pearl / High-Yield Fact**
Genu recurvatum is often associated with spastic cerebral palsy, particularly in patients with bilateral spasticity. It is essential to recognize this condition and implement appropriate management strategies, including physical therapy and orthotics, to prevent further progression and improve quality of life.
**Correct Answer: C. Genu valgum is not correct, however, genu recurvatum is actually seen in spina bifida and cerebral palsy.**