A TERATOCARCINOMA DEVELOPING AFTER GROSS TOTAL EXCISION OF A PINEAL TERATOMA IN A PATIENT WITH SYSTEMIC LUPUS-ERYTHEMATOSUS

This is a rare case of a teratocarcinoma developing at the same site o ne year after the gross total excision of a mature pineal teratoma. Th e malignant tumour arose probably from microscopic remnants of the ter atoma. This patient also suffered from systemic lupus erythematosus. A utoimmune diseases have been associated with an increased risk of mali gnancy, and in this case may have contributed to the malignant transfo rmation of the teratoma.