Description
Why It’s Done:
• To diagnose round cell tumors: The IHC test helps to confirm the diagnosis of round cell tumors, which can be difficult to differentiate from other types of cancers based on morphology alone. By identifying specific cell markers, the test helps pinpoint the type of tumor.
• To classify tumor subtypes: Round cell tumors are a diverse group that includes a variety of cancer types. By identifying markers such as NSE, LCA, CD99, Cytokeratin, and Chromogranin, the test helps classify the tumor into a more specific subtype, aiding in diagnosis.
• To differentiate between similar tumor types: This test is especially useful in distinguishing between neuroendocrine tumors, lymphomas, sarcomas, and carcinomas, which may appear similar under a microscope. For example, NSE and Chromogranin are specific to neuroendocrine tumors, while LCA is used for hematologic cancers.
• To assess tumor origin: This test is crucial for determining the origin of metastatic tumors. If a tumor has spread to other areas of the body, identifying markers like Cytokeratin or CD99 can confirm whether it originates from epithelial or round cell sources.
• To plan treatment: Accurate identification and classification of the tumor guide appropriate treatment decisions, as different tumor subtypes may require different therapies, such as chemotherapy, immunotherapy, or targeted therapies.
Preparation:
• Fasting: Fasting is typically not required for the IHC – Round Cell Tumor (Adults) test, as it is based on tissue samples rather than blood.
• Tissue sample: The test requires a biopsy sample, usually obtained from the tumor tissue. This biopsy may be performed through a needle aspiration or surgical biopsy, depending on the tumor’s location and size.
• Medications: Inform your healthcare provider about any medications you are taking, especially chemotherapy or immunosuppressive drugs, as these treatments may affect the expression of certain tumor markers.
• No special preparation: There are no special dietary or lifestyle preparations needed for the test. However, follow your healthcare provider’s instructions regarding the biopsy procedure, including any medications or supplements that might need to be stopped or adjusted prior to the biopsy.
