Final answer:
Malignant neoplasms, or malignant tumors, are harmful as they are cancerous and can invade and damage tissues, and also spread to other body parts through metastasis, leading to new tumors.
Step-by-step explanation:
Malignant neoplasms, which are also known as malignant tumors, are detrimental to health as they are cancerous growths that can invade and damage surrounding tissues.
Unlike benign tumors that remain localized and generally do not impact health significantly, malignant tumors have no growth limits and can spread to other parts of the body
through a process called metastasis. This spread of cancer cells to new areas can lead to the formation of new tumors, making treatment more challenging and affecting a person's overall health.
Malignant neoplasms continue to divide and undergo DNA replication, which may lead to further somatic mutations, enhancing their ability to metastasize and grow in various tissues throughout the body.
Thus, the presence of a malignant neoplasm indicates the presence of actual cancer, which requires medical attention and intervention to potentially control or cure it.