SUMMARYFifteen cases of primary pulmonary malignant lymphoma (M.L.) were studied using strict criteria to distinguish them from secondary pulmonary manifestations. All were M.L.'s of the lymphoid B type.

A case of primary intracerebral plasma cell granuloma without meningeal attachment is presented. Histologically, the lesion showed two different patterns. At the center, it displayed the features of a benign fibrous histiocytoma. At the periphery, a mixture of polyclonal plasma cells, lymphocytes, and “epithelial-like”cells was observed. Electron microscopy and immunocytochemistry confirmed the histiocytic nature of the “epithelial-like cells.” The differential diagnosis and histogenesis of such a lesion are discussed.

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We report 2 cases of aluminium sensitivity in adults. Each time, the means of sensitization was the inoculation of aluminium-precipitated pollen or dust extracts for hyposensitization. We conclude that aluminium allergy is not exceptional and that in these cases one can observe allergic reactions to the Finn Chamber tests.

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