[Child orbital lymphoma: about one case].

BACKGROUND: The non-Hodgkin's lymphomas are a group of neoplasms characterized by proliferation of malignant lymphocytes. There is a wide variety of presenting signs and symptoms depending on the site of involvement and aggressiveness of the disease. Many organs in the body may be affected. Ocular and orbital localisations are rare, usually discovered in the older people and are exceptional in childhood. CASE REPORT: A 9-year old girl consulted for exophthalmia of the left eye without neither inflammation nor visual function alteration. The magnetic resonance imaging revealed a voluminous orbital tumour, probably a rhabdomyosarcoma. Two biopsies were done on the tumour without conclusion. The biopsy done on a frontal metastasis affirmed the diagnosis of non-Hodgkin's lymphoma. Chemotherapy led to tumour regression and involution of the exophthalmia. The aim of this study is to evaluate the clinical features and treatment of child orbital lymphoma.