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Controversies in clinical cancer dormancy Uhr JW; Pantel KProc Natl Acad Sci U S A 2011[Jul]; 108 (30): 12396-400Clinical cancer dormancy is defined as an unusually long time between removal of the primary tumor and subsequent relapse in a patient who has been clinically disease-free. The condition is frequently observed in certain carcinomas (e.g., breast cancer), B-cell lymphoma, and melanoma, with relapse occurring 5-25 y later. Clinical data suggest that a majority of breast cancer survivors have cancer cells for decades but can remain clinically cancer-free for their lifetime. Thus, there is a major effort to characterize the molecular mechanisms responsible for inducing tumor cell dormancy using experimental models or studying the early phases of cancer growth in humans. Many molecules and signaling pathways have been characterized and have led to concepts that dominate the field, such as the possible role of innate and adaptive immunity in immune surveillance and initiation and maintenance of dormancy. However, recent clinical data do not support many of these concepts. Several areas need further study to determine their relevance to clinical cancer dormancy. We suggest hypotheses that may contribute to elucidation of the mechanisms underlying the dormant state.|Adaptive Immunity[MESH]|Animals[MESH]|Breast Neoplasms/immunology/pathology[MESH]|Cancer Vaccines/pharmacology[MESH]|Female[MESH]|Homeostasis/immunology[MESH]|Humans[MESH]|Immunity, Innate[MESH]|Male[MESH]|Mice[MESH]|Models, Immunological[MESH]|Neoplasms/*immunology/pathology/therapy[MESH]|Recurrence[MESH]|Time Factors[MESH] |
