What does dysplasia mean?
Dysplasia refers to the abnormal growth or development of cells, tissues, or organs within the body. In medicine it most often describes precancerous changes, where cells lose their normal size, shape, and organisation — as seen in cervical or oesophageal dysplasia detected during routine screening. The term also covers structural abnormalities present from development onward, such as hip dysplasia, in which a joint fails to form properly and is well known among dog owners and orthopaedic specialists alike. Derived from Greek roots meaning 'bad formation', the word entered English through medical Latin in the late nineteenth century. Clinicians grade dysplasia by severity, from mild to severe, because its presence can signal an elevated risk of progression to malignancy. Though technical and largely confined to medical settings, dysplasia is worth knowing: it appears frequently in health reporting, screening results, and veterinary diagnoses, where early detection often makes the difference between simple monitoring and serious intervention.
nounAbnormal development or growth of cells, tissues, or organs, often indicating a precancerous condition.
- Abnormal development or growth of cells, tissues, or organs, especially as a precancerous change in epithelial tissue.
- Abnormal development of a body part, such as a joint (e.g. hip dysplasia in dogs).
"The biopsy revealed mild dysplasia of the cervical cells, which doctors will monitor closely."
"Routine screening detected low-grade dysplasia in the oesophageal lining."
"Veterinarians screened both parents for hip dysplasia before allowing the litter."
Rarely needed since the term usually appears in uncountable clinical contexts, but the regular plural applies when discussing multiple distinct cases or types.
"Several skeletal dysplasias were ruled out during the genetic workup."
The same word that flags a precancerous smear result also names why some puppies wobble on their hips — dysplasia spans cells to skeletons.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of dysplasia
Dysplasia derives from the Greek roots 'dys-' meaning bad or faulty and '-plasia' from 'plassein', meaning to form or mould. The word was formed in modern scientific Latin and entered English usage in the late nineteenth century as pathology developed as a discipline. It shares this formative root with related medical terms such as hyperplasia, hypoplasia, neoplasia, and aplasia.
Related word forms
How dysplasia is actually used
A formal, medical term used almost exclusively in clinical and veterinary contexts. It carries an ominous connotation for patients because it often precedes cancer, though many forms are treatable when caught early. Plural: dysplasias.
Easily confused with dysplasia
Hyperplasia is an increase in the number of normal cells; dysplasia is abnormal development or maturation of cells.
Anaplasia is a complete loss of cellular differentiation typical of malignant tumours; dysplasia is an earlier, less severe abnormality.