Tubuloalveolar adenoma of salivary gland.

An unusual monomorphic salivary gland adenoma, occurring in a 57-year-old woman, is described. The lesion was histologically similar to the so-called tubular adenoma; however, occasional microscopic foci of serous (acinar cell) differentiation were present. The term tubuloalveolar adenoma is proposed to describe salivary gland tumors that are histologically benign and composed of cells resembling those of normal intercalated ducts and secretory units (acini).