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Retinoblastoma regression patterns following chemoreduction and adjuvant therapy in 557 tumors Shields CL; Palamar M; Sharma P; Ramasubramanian A; Leahey A; Meadows AT; Shields JAArch Ophthalmol 2009[Mar]; 127 (3): 282-90OBJECTIVE: To evaluate retinoblastoma regression patterns following chemoreduction and adjuvant therapy. PARTICIPANTS: A total of 557 retinoblastomas. METHODS: A retrospective medical record review following 6 cycles of chemoreduction and tumor consolidation (thermotherapy or cryotherapy). Regression patterns included type 0 (no remnant), type 1 (calcified remnant), type 2 (noncalcified remnant), type 3 (partially calcified remnant), and type 4 (flat scar). MAIN OUTCOME MEASURES: Regression pattern. RESULTS: Retinoblastoma regressions were type 0 (n = 10), type 1 (n = 75), type 2 (n = 28), type 3 (n = 127), and type 4 (n = 317). Tumors with an initial thickness of 3 mm or less regressed most often to type 4 (92%), those 3 to 8 mm regressed to type 3 (34%) or type 4 (40%), and those thicker than 8 mm regressed to type 1 (40%) or type 3 (49%). Factors predictive of type 1 regression included larger tumor base and closer foveolar proximity. Factors predictive of type 3 included older age, larger tumor base, macular location, closer foveolar proximity, and lack of consolidation. Factors predictive of type 4 included familial hereditary pattern, smaller tumor base, greater foveolar distance, and tumor consolidation. CONCLUSIONS: Following chemoreduction, most small retinoblastomas result in a flat scar, intermediate tumors in a flat or partially calcified remnant, and large tumors in a more completely calcified remnant.|*Cryotherapy[MESH]|*Hyperthermia, Induced[MESH]|Antineoplastic Combined Chemotherapy Protocols/*therapeutic use[MESH]|Calcinosis/pathology[MESH]|Carboplatin/therapeutic use[MESH]|Child, Preschool[MESH]|Etoposide/therapeutic use[MESH]|Female[MESH]|Humans[MESH]|Infant[MESH]|Male[MESH]|Retinal Neoplasms/classification/*pathology/therapy[MESH]|Retinoblastoma/classification/*pathology/therapy[MESH]|Retrospective Studies[MESH]|Vincristine/therapeutic use[MESH] |
