IMMUNOHISTOCHEMISTRY, CD 34

The IHC – CD34 (Cluster of Differentiation 34) test is an immunohistochemistry-based diagnostic assay used to detect CD34 protein expression in tissue samples. CD34 is a transmembrane glycoprotein commonly expressed on hematopoietic stem cells, endothelial cells, and certain soft tissue tumors.

This test is widely used in pathology and oncology to help diagnose vascular tumors, evaluate hematological malignancies, and classify specific soft tissue neoplasms. CD34 staining is especially valuable in identifying blood vessel structures and determining tumor origin.

Benefits of the Test

• Helps diagnose vascular tumors and soft tissue neoplasms
• Assists in identifying endothelial and hematopoietic cells
• Supports classification of certain leukemias and sarcomas
• Improves tumor differentiation accuracy
• Helps guide oncology treatment planning

Why Doctors Recommend This Test

Doctors recommend the IHC CD34 test when there is suspicion of vascular tumors, soft tissue tumors, or hematological disorders. It is commonly used in:

• Diagnosis of vascular tumors such as hemangioma and angiosarcoma
• Evaluation of gastrointestinal stromal tumors (GIST)
• Soft tissue tumor classification
• Bone marrow and leukemia investigations
• Oncology biopsy interpretation

CD34 is often used together with markers such as CD31, CD117, SMA, Desmin, and Factor VIII-related antigen for comprehensive tumor profiling.

Preparation Before Test

No special preparation is required from the patient. Important considerations include:

• The test is performed on a biopsy or surgical tissue sample
• No fasting or medication restrictions are necessary
• Clinical findings and imaging reports may support interpretation

Normal Reporting Time

The typical turnaround time is 3 to 5 working days, depending on laboratory workflow and tissue processing requirements.

Who Should Take This Test

• Patients with suspected vascular tumors
• Individuals with soft tissue masses of unknown origin
• Cases requiring hematopoietic tumor evaluation
• Patients undergoing biopsy for tumor classification
• Oncology patients needing immunohistochemistry profiling

The IHC CD34 test is an important diagnostic tool in surgical pathology and hematopathology. By detecting endothelial and stem cell-related protein expression, it helps clinicians accurately diagnose vascular and soft tissue tumors and guide effective treatment planning.