ECCRINE SWEAT GLAND DISORDERS: PART I--NEOPLASMS.

Many eccrine gland neoplasms can be separated into categories based upon anatomic appearance and microscopic differentiation as these characteristics pertain to normal eccrine gland architecture. Eccrine lobules are composed of glands and ducts. The glandular or secretory portion is a coiled tubule located in the dermis or upper portion of the subcutaneous fat. Eccrine sweat gland neoplasms are a complex group of neoplasms. Because many demonstrate histologic similarity and a spectrum of eccrine, acrosyringial, ductal, and secretory differentiation, they are not always easily classified.