mastocytoma
/ˌmastəsʌɪˈtəʊmə/Pathology
noun
A tumour composed of mast cells, occurring most frequently in the skin and subcutaneous tissue, and particularly common in certain breeds of dog.
Origin
1920s; earliest use found in Quarterly Cumulative Index Medicus. From German Mast mast + -o- + -cyte + -oma, after Italian mastocitoma; compare French mastocytome, and earlier mastocyte.