Which statement best identifies dysplasia in a diagnostic sense?

Which statement best identifies dysplasia in a diagnostic sense?

• A. Hyperplasia
• B. Metaplasia
• C. Atrophy
• D. Dysplasia

Answer: (D)

Dysplasia in a diagnostic sense is a pattern of disordered cellular growth with architectural and cytologic abnormalities that remains confined to the epithelium, without invasion through the basement membrane. The cells show variability in size and shape (pleomorphism), increased nuclear-to-cytoplasmic ratio, hyperchromasia, loss of maturation, and abnormal mitotic activity. These features indicate a premalignant change with potential to progress to cancer if untreated. This differs from hyperplasia, which is simply an increase in cell number with preserved tissue architecture; metaplasia, which is the replacement of one differentiated cell type by another as an adaptive process; and atrophy, which is a reduction in cell size and function. Dysplasia uniquely describes disordered growth and cellular atypia before invasion occurs, signaling a precancerous condition.

Dysplasia in a diagnostic sense is a pattern of disordered cellular growth with architectural and cytologic abnormalities that remains confined to the epithelium, without invasion through the basement membrane. The cells show variability in size and shape (pleomorphism), increased nuclear-to-cytoplasmic ratio, hyperchromasia, loss of maturation, and abnormal mitotic activity. These features indicate a premalignant change with potential to progress to cancer if untreated.

This differs from hyperplasia, which is simply an increase in cell number with preserved tissue architecture; metaplasia, which is the replacement of one differentiated cell type by another as an adaptive process; and atrophy, which is a reduction in cell size and function. Dysplasia uniquely describes disordered growth and cellular atypia before invasion occurs, signaling a precancerous condition.