[Retinoblastoma in Senegal: Pathologist's view]. / Le rétinoblastome au Sénégal : point de vue du pathologiste.

OBJECTIVES: Describe the macroscopic and microscopic profiles of the retinoblastoma (RB) in Senegal and correlate histological criteria to evolution to emerge severity factors. METHODOLOGY: We realized a retrospective study on 10years (January 2005-December 2014). Only patients (n=67) who performed a histological analysis of the enucleation specimen (n=68) were followed until the end of the study. RESULTS: The tumor measured an average of 3.8cm (2/4.5). Endophytic tumor development was in 55 cases (80.8%), exophytic in 6 cases (8.9%) and mixed in 7 cases (10.3%). Extra-retinal form was present in 13 cases (19.2%). The RB was well differentiated in 11 cases (16.2%), moderately differentiated in 31 cases (45.6%) and undifferentiated in 26 cases. The invasion of optic nerve (ON) was present in 18 cases (26.5%). The tumor was extra-retinal in 37 cases (54.4%). The anterior chamber was invaded in 6 cases (8.8%). The global survival at 2years was 84% and 70% at 5years. In multivariate analysis, well tumor differentiation and stage pT1 were associated with remission. The other-laminar of ON invasion, the massive invasion of the choroid and pT3 stage were recurrence risk factors. The undifferentiating tumor, invasion of the ON section, tumor sclera crossing and pT4 stage were predictive death. CONCLUSION: The RB histological prognostic factors should be clearly identified in the pathological reports as they guide the after surgical period care and follow-up management strategy.

[A rare parotid tumor]. / Une tumeur parotidienne rare.

INTRODUCTION: Sebaceous lymphadenoma of the parotid (SLP) is a rare, benign tumor with similar epidemiological and macroscopic characteristics with other sebaceous differentiated tumors of the parotid (SDTP). The authors report a case of SLP in an 80-year-old woman. They then recall the distinctive histological and immunohistochemical criteria of SDTP. OBSERVATION: Mrs P. D. was received during a surgical consultation for the management of a painless right parotid swelling that has evolved for 10years, increasing slightly in volume. At admission, the mass was movable, firm with a healthy skin without facial paralysis or satellite lymphadenopathy. The surgical intervention performed removed a nodular mass measuring 7cm, encapsulated, yellowish. It was made of regular epithelial cells without atypia or mitoses organized in nests, trabeculae and massifs. This tumor also included small canalicular cystic dilatations associated with several islands of sebaceous glands. The stroma was dense lymphoid with follicles and germinal centers. The tumor cells were CK7+, P63+, MSA+ and had a Ki67<5%. The diagnosis of an SLP was retained. No additional therapy was performed. One year after surgery, the patient had no local recurrence or metastatic foci. CONCLUSION: SLP is a rare tumor with a particular histological and immunohistochemical profile. It is an epithelial tumor with sebaceous islands, a dense reactional lymphoid stroma, expression of luminal and basal epithelial markers and a low proliferation index.