displasia

Dysplasia is a term used in medicine to describe abnormal development or growth of cells, tissues, or organs. It denotes disordered cellular organization and variation in size, shape, and maturation within a tissue. Dysplasia is not cancer, but in some contexts it can be a precancerous condition that carries a risk of progression to neoplasia if the abnormal cells persist or acquire additional changes.

Dysplasia can be congenital or acquired later in life. Causes include genetic factors, environmental exposures, chronic inflammation, and infections such as human papillomavirus in cervical dysplasia. Histologically, dysplasia shows cellular atypia and architectural disarray, but without evidence of invasion through the basement membrane in true dysplasia. The term is often used for epithelial tissues, though developmental dysplasias can affect bones, joints, or other organs.

Common examples include cervical dysplasia, where cervical intraepithelial neoplasia is graded as low or high grade based on the extent of dysplastic change and the risk of progression to cancer. Skeletal dysplasias refer to disorders of bone or cartilage development, producing abnormal bone growth and body proportions. Other organ-specific dysplasias can occur in the skin, respiratory tract, and gastrointestinal tract.

Diagnosis typically relies on clinical assessment, imaging, and histopathology from biopsies or cytology. Management depends on the tissue involved and the grade or severity, ranging from observation and surveillance for low-grade lesions to surgical excision or ablation for higher-grade dysplasia. Prevention and control focus on addressing underlying causes, such as infection or environmental risk factors, and appropriate follow-up to monitor for progression.