Reactive mesothelial cells are modified cells from the mesothelium, the thin layer of tissue covering internal organs and lining body cavities. These cells undergo changes in response to inflammation, injury, or disease.
The mesothelium produces reactive mesothelial cells when exposed to irritants, infections, or trauma. The cells change shape and function, often appearing in fluid samples like pleural or peritoneal fluid during diagnostic tests.
For example, in cases of peritoneal dialysis, reactive mesothelial cells may appear in the dialysate due to the mechanical irritation caused by the procedure. These cells help repair and protect the peritoneal membrane.
Reactive mesothelial cells can appear in different forms depending on the cause and location:
These cells play a important role in diagnosing and managing various conditions. Their presence indicates inflammation or injury, helping clinicians identify issues like infections, tumors, or autoimmune diseases.
Reactive mesothelial cells are often confused with malignant cells due to their atypical appearance. However, they lack the aggressive features of cancer cells, such as invasion and metastasis.
A study published in the Journal of Cytopathology (2020) highlights that reactive mesothelial cells can mimic malignant cells, leading to misdiagnosis if not carefully evaluated. Proper cytological techniques and immunohistochemical markers are essential for differentiation.
During my time working in a diagnostic lab, I encountered several cases where reactive mesothelial cells were present in fluid samples. One notable case involved a patient with recurrent pleural effusions. The initial cytology report suggested malignancy, but further analysis confirmed the cells were reactive mesothelial cells due to chronic inflammation. This experience underscored the importance of thorough evaluation and the use of additional tests to avoid misdiagnosis.