A metastatic cancerous tumour is termed 'sarcoma' if the disorder is in

Options

A. fibroblasts
B. circulatory system
C. immune system
D. epithelial cells.

Explanation

To solve the question about what type of cells a metastatic cancerous tumor is termed 'sarcoma' if the disorder is in, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Sarcoma**:
- Sarcoma is a type of cancer that originates in connective tissues, which include bones, cartilage, fat, muscle, and blood vessels.

2. **Identify the Options**:
- The options provided are fibroblasts, circulatory system, immune system, and epithelial cells.

3. **Evaluate Each Option**:
- **Fibroblasts**: These are cells found in connective tissue. Since sarcoma affects connective tissues, this option is likely correct.
- **Circulatory System**: Cancers affecting the circulatory system are typically referred to as cardiac tumors. This does not fall under sarcoma.
- **Immune System**: Cancers affecting the immune system are known as lymphomas (for lymphocytes) and leukemias (for blood cells). These are not classified as sarcomas.
- **Epithelial Cells**: Cancers that arise from epithelial cells are called carcinomas, not sarcomas.

4. **Conclusion**:
- Based on the evaluations, the correct answer is that a metastatic cancerous tumor is termed 'sarcoma' if the disorder is in **fibroblasts**.

### Final Answer:
- A metastatic cancerous tumor is termed 'sarcoma' if the disorder is in **fibroblasts**.

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