**Core Concept**
Askin's tumor is a rare type of malignant neoplasm that primarily affects the chest wall, particularly in children and young adults. It is a type of extrapulmonary small cell carcinoma, which is a distinct entity from pulmonary small cell carcinoma.

**Why the Correct Answer is Right**
Askin's tumor is characterized by its aggressive behavior and rapid growth, often presenting with symptoms such as chest pain, cough, and shortness of breath. The tumor arises from the neural crest cells, which are precursors to the cells that give rise to the peripheral nervous system. This leads to the production of neuroendocrine hormones, contributing to the tumor's rapid growth and metastasis. The tumor is often associated with a poor prognosis due to its aggressive nature and early metastasis.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately describe Askin's tumor. Askin's tumor is not a type of osteosarcoma, which is a different malignant bone tumor.
**Option B:** This option is incorrect as it does not accurately describe Askin's tumor. Askin's tumor is not a type of Ewing's sarcoma, which is a different malignant bone tumor.
**Option C:** This option is incorrect as it does not accurately describe Askin's tumor. Askin's tumor is not a type of rhabdomyosarcoma, which is a different type of soft tissue sarcoma.

**Clinical Pearl / High-Yield Fact**
Askin's tumor is often associated with a poor prognosis, and early diagnosis is crucial for improving patient outcomes. It is essential for clinicians to be aware of this rare tumor and its characteristic presentation, particularly in pediatric and young adult populations.

**Correct Answer:** C. Askin's tumor is a type of extrapulmonary small cell carcinoma.