Question

Which is the most feared property of malignant tumors ?

• A. Neoplasty
• B. Metastasis
• C. Rapid invasive growth
• D. Loss of contact inhibition

Answer 1

The Correct Option is B

Malignant tumors, commonly known as cancers, exhibit several properties that distinguish them from benign tumors and normal tissues. Let's analyze the given options: 

• Neoplasty (or Neoplasia): This simply means "new growth" and refers to the formation of a neoplasm or tumor. Both benign and malignant tumors are neoplasms. While uncontrolled growth is a hallmark of cancer, neoplasia itself isn't the most feared property specific to malignancy.
• Metastasis: This is the process by which cancer cells break away from the primary tumor, enter the bloodstream or lymphatic system, travel to distant parts of the body, and form secondary tumors (metastases). This ability to spread makes the cancer systemic and significantly harder to treat effectively. Cancers that have metastasized are often associated with a poorer prognosis and higher mortality.
• Rapid invasive growth: Malignant tumors often grow rapidly and invade (infiltrate) surrounding tissues. This local invasion can damage nearby organs and structures and makes complete surgical removal difficult. While dangerous, a locally invasive tumor might still be treatable if it hasn't spread distantly.
• Loss of contact inhibition: Normal cells typically stop dividing when they come into contact with neighboring cells. Cancer cells lose this property, allowing them to continue dividing and pile up, contributing to tumor formation. This is a fundamental characteristic of uncontrolled cell growth but doesn't directly describe the spread or lethality associated with advanced cancer.

Comparing these properties, metastasis is widely considered the most feared property of malignant tumors. It is the primary cause of cancer-related death, as widespread secondary tumors are very difficult to eradicate completely with current therapies like surgery, radiation, or chemotherapy. The ability to spread throughout the body makes cancer a systemic disease, rather than just a localized problem.

Answer 2

The most feared property of malignant tumors is metastasis. Metastasis refers to the ability of cancer cells to spread from the original (primary) site to other parts of the body, forming secondary tumors. This spread makes the cancer much more difficult to treat and is often associated with poor prognosis.

Other options:

• Neoplasia refers to abnormal cell growth, not a property specific to malignant tumors.
• Rapid invasive growth and loss of contact inhibition are characteristics of malignant tumors but are less critical than metastasis in terms of prognosis.

The correct answer is (B) : Metastasis.