Thymic Carcinoma: Current Concepts

OF NORTH AMERICAcould be assigned to high- or low-grade histologic categories, with clinical behavior paralleling their morphology. Despite the many advances in our un-derstanding of these tumors, thymic carcinoma remains an elusive diagnosis. With few exceptions, it remains a diagnosis of exclusion because the possibility of a late metastasis or of spread from an occult primary to the mediastinum must always be ruled out first before making this diagnosis.60 cases, various histologic subtypes were identified, the majority of which these tumors was published in 1991 by Suster and Rosai [3]. In their study ofand Histologic Feature