Carcinoma ex benign pleomorphic adenoma of the parotid gland.

Background: Carcinoma in pleomorphic salivary adenoma is a common histologic subtype of primary parotid malignancy.

Methods: In this study, 28 patients (predominantly male) with histologically diagnosed carcinoma in pleomorphic salivary adenoma presenting over 10 years were retrospectively reviewed.

Results: Only 25 percent of patients had a previously treated pleomorphic salivary adenoma.

Iris melanocyte numbers in Asian, African American, and Caucasian irides.

Purpose: The anatomical basis for iris color has long been a controversial issue in ophthalmology. Recent studies demonstrated that in Caucasians, blue-eyed, gray-eyed, and hazel-eyed individuals have comparable numbers of iris melanocytes. The present investigation was carried out to compare melanocyte numbers in the irides of Asian, African American, and Caucasian brown-eyed individuals.