IMMUNOHISTOCHEMISTRY, ACTH

The Immunohistochemistry (IHC) – ACTH test is a specialized diagnostic test used to detect Adrenocorticotropic Hormone (ACTH) expression in tissue samples. ACTH is a hormone produced by the pituitary gland that stimulates the adrenal glands to release cortisol, an essential hormone involved in stress response, metabolism, and immune regulation.

This test is primarily used in endocrine pathology to diagnose and classify pituitary adenomas, especially corticotroph adenomas, which produce excess ACTH and may cause Cushing’s disease. Detecting ACTH expression helps pathologists confirm whether a pituitary tumor is actively producing this hormone.

The IHC ACTH test is also useful for evaluating certain neuroendocrine tumors and differentiating ACTH-producing tumors from non-functioning pituitary lesions. It plays an important role in understanding tumor behavior and guiding endocrine treatment decisions.

The ACTH marker is often used along with other pituitary hormone markers such as Prolactin, Growth Hormone (GH), TSH, LH, FSH, and Pit-1 for complete pituitary tumor classification.

Benefits of the Test

The IHC ACTH test offers several clinical benefits:

• Detects ACTH-producing cells accurately
• Helps diagnose corticotroph pituitary adenomas
• Supports classification of endocrine tumors
• Assists in identifying hormone-secreting lesions
• Improves diagnostic precision
• Guides endocrine treatment planning

This test is essential for accurate endocrine tumor diagnosis.

Why Doctors Recommend This Test

Doctors recommend the ACTH IHC test when evaluating pituitary tumors or endocrine abnormalities.

It is commonly advised for:

• Suspected pituitary adenoma diagnosis
• Evaluation of Cushing’s disease
• Classification of hormone-secreting pituitary tumors
• Differentiation of endocrine tumor subtypes
• Advanced endocrine pathology assessment

The results help endocrinologists and neurosurgeons determine the correct diagnosis and treatment strategy.

Preparation Before Test

No special preparation is required from the patient. The test is performed on previously collected pituitary tissue biopsy or surgical specimens.

Normal Reporting Time

The usual turnaround time for the ACTH IHC test is 3 to 5 working days, depending on tissue complexity and laboratory workflow.

Who Should Take This Test

This test is recommended for:

• Patients with suspected pituitary adenomas
• Individuals showing symptoms of hormone imbalance
• Patients with suspected Cushing’s disease
• Cases requiring endocrine tumor classification
• Patients requiring precise pituitary diagnosis for treatment planning

The IHC ACTH test is an essential diagnostic tool in endocrine pathology. It accurately identifies ACTH-producing tumors, supports early diagnosis, and helps guide personalized treatment for improved patient outcomes.