Abstract
Adenoid cystic carcinomas of salivary glands occur more frequently in women and bear remarkable similarity to adenoid cystic carcinomas of the breast. In addition, breast carcinomas express estrogen and progesterone receptors that impact prognostic significance. This suggests a possible role for sex steroid hormones in the development and progression of salivary gland adenoid cystic carcinoma. On this basis, 12 samples of formalin-fixed, paraffin-embedded salivary gland adenoid cystic carcinomas and 12 samples of normal salivary gland tissue were immunohistochemically evaluated for estrogen and progesterone receptor protein expression. Estrogen receptors were not detected in either group; however, a significantly higher progesterone receptor level was evident in the neoplastic group compared with normal tissue (p < 0.01). These data confirm the presence of progesterone receptors within normal and neoplastic salivary gland tissue. Progesterone receptor expression may be of possible prognostic and therapeutic value in some cases of adenoid cystic carcinoma.
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