Which term means 'new growth' and includes tumors that may be benign or malignant with a unique appearance and growth pattern?

• A. Neoplasia
• B. Hyperplasia
• C. Aplasia
• D. Dysplasia

Answer: (A)

Neoplasia is the term for a new, abnormal growth arising from clonal cell proliferation that can form benign or malignant tumors. These growths have an autonomous, disordered growth pattern and a characteristic appearance that persists independent of the original stimulus. This contrasts with hyperplasia, which is simply an increase in cell number due to a stimulus but remains regulated and typically reversible when the stimulus is removed. Dysplasia refers to abnormal maturation and architectural disarray of cells and is usually a precancerous change, not a true tumor. Aplasia means failure of development or absence of tissue. Thus, the concept described as a new growth that may be benign or malignant with a unique appearance and growth pattern is neoplasia.