Step 1: Understanding the Concept:
Neoplasms (tumors) are divided into benign and malignant categories.
Malignant tumors demonstrate aggressive behavior, tissue invasion, rapid multiplication, and a tendency to spread to distant parts of the body.
Step 2: Detailed Explanation:
Let us review each of the descriptive parameters:
- Statement A: Malignant cells divide at an uncontrolled, accelerated rate, resulting in rapid tumor growth and a high mitotic index compared to benign cells.
Therefore, Statement A is correct.
- Statement B: Metastasis is the hallmark feature of malignancy.
The statement that malignant tumors do not metastasize is incorrect.
Therefore, Statement B is incorrect.
- Statement C: Because malignant tumors are poorly demarcated, unencapsulated, and infiltrate locally, surgical removal can be challenging, making local recurrence common.
Therefore, Statement C is incorrect.
- Statement D: In malignant cells, the nucleus enlarges significantly while cellular volume changes disproportionately.
This causes an increase in the nuclear-to-cytoplasmic (N:C) ratio, which is equivalent to a decrease in the cytoplasm-to-nucleus (C:N) ratio.
Therefore, Statement D is correct.
Step 3: Final Answer:
Since only statements A and D are true, the correct choice is (C).