Frozen section examination demonstrates fibrosis and cystic spaces. Also seen are areas of compressed glands with a lobular orientation. The glands are lined by a single layer of epithelial cells with oval nuclei and regular arrangement. No true invasion of glands into the adjacent stroma is seen. This patient probably has which of the following?
Atypical ductal hyperplasia Ductal carcinoma in situ Lobular carcinoma in situ Sclerosing adenosis