![](https://webarchive.library.unt.edu/eot2008/20090514043802im_/http://www.cancer.gov/images/spacer.gif) |
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(MAS-toh-sy-TOH-muh)
![](https://webarchive.library.unt.edu/eot2008/20090514043802im_/http://www.cancer.gov/images/spacer.gif)
| A growth or lump of mast cells (a type of white blood cell). Mast cell tumors can involve the skin, subcutaneous tissue, and muscle tissue. Also called mast cell tumor. |
Previous Definitions: | massage therapy, mast cell, mast cell tumor, mastectomy, mastitis | Next Definitions: | maternal, matrix metalloproteinase, Matulane, mature T-cell lymphoma, mature teratoma |
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