Reported cases of the adenoid basal variety of cervical neoplasia are infrequent. However, the fundamental differences in its biologic behavior justify documentation of these tumors. Three cases of invasive disease and two instances of superficial alterations, which are representative of this unusual type of cervical neoplasia, are compared with similar tumors arising in the skin and appendages. Histogenesis and clinicopathologic features of these atypical neoplasms are discussed.
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