MedicalTerminology DB

Meaning of MUC-1: A substance found on certain epithelial cells (cells that cover organs, glands, and other body surfaces) and on breast cells involved in making milk.

Definition of MUC-1

A substance found on certain epithelial cells (cells that cover organs, glands, and other body surfaces) and on breast cells involved in making milk. It is also found on tumors of the breast, ovary, lung, and prostate. MUC-1 is a type of tumor marker.

Written and maintained by James Murray Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.

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For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.