Benign tumour of voluntary muscle
**Core Concept**
A benign tumor of voluntary muscle is a type of soft tissue tumor that arises from skeletal muscle cells. This condition is often associated with muscle hypertrophy and fibrosis, leading to a palpable mass.
**Why the Correct Answer is Right**
The correct answer is a type of benign tumor known as a **Rhabdomyoma**. Rhabdomyomas are typically found in the skeletal muscle of the heart, particularly in infants and children, but can also occur in other parts of the body. They are characterized by the presence of large, eosinophilic cells with abundant cytoplasm and a minimal amount of nuclear material. The pathogenesis of rhabdomyomas is not fully understood, but they are thought to arise from a congenital defect in muscle cell development.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because **Lipoma** is a type of benign tumor that arises from fat tissue, not muscle tissue.
**Option B:** This option is incorrect because **Hemangioma** is a type of benign tumor that arises from blood vessels, not muscle tissue.
**Option C:** This option is incorrect because **Fibroma** is a type of benign tumor that arises from fibrous connective tissue, not muscle tissue.
**Clinical Pearl / High-Yield Fact**
It's essential to differentiate rhabdomyomas from other types of muscle tumors, such as rhabdomyosarcomas, which are malignant and require prompt treatment. A thorough histological examination and clinical evaluation are crucial in making an accurate diagnosis.
**Correct Answer:** C.