UTHSC Fall 2022 D2 Par 3 Pathology

UTHSC Fall 2022 D2 Par 3 Pathology Neoplasia New growth Neoplasm An abnormal mass of tissue, the growth of which exceeds and is uncoordinated with that of the normal tissues and persists in the same excessive manner after cessation of the stimuli which evoked the change Tumor and neoplasm are (antonym/synonym) synonym hyperplasia increase in number of cells Tumor originally applied to the swelling caused by inflammation, now equated with neoplasm. Oncology study of tumors or neoplasms Neoplasms origin • Epithelial • Mesenchymal Neoplasms Biologic Behavior • Benign • Malignant when is a tumor said to be benign? when its gross and microscopic appearances are considered relatively innocent, implying that it will remain localized, will not spread to other sites, and is amenable to local surgical removal how are benign tumors designated in vocabulary? by attaching the suffix -oma to the name of the cell type from which the tumor originates what do epithelial neoplasms arise from? surface linings or glands Adenoma a benign tumor of glands Polyp a mass arising on an epithelial surface, not necessarily a neoplasm, such as nasal polyp Papilloma a polyp with finger-like projections due to a benign neoplastic epithelial hyperplasia Benign Mesenchymal Neoplasms Nomenclature Suffix "-oma" - Generally named for the neoplastic cell type - Examples: lipoma, fibroma, leiomyoma - Exceptions: Malignant: Melanoma, lymphoma, multiple myeloma, mesothelioma, seminoma - Inflammatory (benign): Granuloma, hematoma T/F The following terms have specific definition and not all considered as a benign neoplasm: - Teratoma