Definition

1. Adjective:
   • Relating to or characterized by anaplasia: Pertaining to the reversion of cells to a more primitive, undifferentiated, and often rapidly dividing form. This is a characteristic feature of highly malignant tumors.

Usage

The term anaplastic is used almost exclusively in medical and biological contexts, particularly in oncology (the study of cancer) and pathology. It describes cells or tissues that have lost their normal, specialized structure and function.

Examples

• The biopsy revealed an anaplastic tumor, indicating a very aggressive form of cancer.
• Anaplastic cells are poorly differentiated and difficult to classify under a microscope.
• The prognosis for anaplastic thyroid carcinoma is often less favorable than for other types.

Advanced Usage

• Anaplastic transformation: The process by which a tumor becomes more primitive and aggressive.
  • The disease progressed, showing signs of anaplastic transformation.
• Used in compound medical terms to specify a type of highly malignant cancer:
  • Anaplastic large cell lymphoma
  • Anaplastic astrocytoma

Variants and Related Words

• Anaplasia (noun): The condition itself, defined as a loss of structural differentiation within a cell or group of cells.
• Dedifferentiated (adjective): A synonym often used interchangeably with anaplastic to describe the loss of specialized cell features.

Synonyms

• Dedifferentiated
• Undifferentiated (in a pathological context)
• Primitive (in a pathological context)

Antonyms

• Differentiated
• Well-differentiated
• Specialized

Adjective

1. of or relating to anaplasia