Challenges in the early diagnosis and staging of Fallopian-tube carcinomas associated with BRCA mutations.

The histopathologic diagnosis of fallopian-tube carcinoma has been traditionally made at an advanced stage. More recently, predictive genetic BRCA testing is leading to the recognition in prophylactic oophorectomy specimens of clinically occult tubal carcinomas that are frequently in situ or small early-stage invasive carcinomas. These early lesions present a challenge in diagnosis and staging because the available criteria for the histopathologic diagnosis and staging of tubal carcinoma were derived from the clinicopathologic experience derived from the usual high-stage tubal carcinomas. The detection of early-stage tubal carcinomas requires that all tubal tissue be submitted for histologic examination. The diagnostic criteria for tubal in situ carcinoma have been defined, although the natural history of this lesion is unclear. Similarly defined criteria for a diagnosis of tubal dysplasia are lacking. Any early, invasive tubal carcinoma should be staged using a refined staging system suitable for early stage and fimbrial carcinomas. The adoption of these methods should increase our knowledge of early-stage tubal carcinoma and may add to our understanding of the development of ovarian-epithelial neoplasia.