Primary lymphoplasmacytic lymphoma of the larynx: a rare localization of MALT-type lymphoma.

Laryngoscopy carried out in a 46-year-old man revealed a left paralaryngeal tumor. The mass was entirely removed by left pharyngolaryngotomy. Microscopic study showed a diffuse malignant lymphoma of low-grade malignancy, exhibiting all the criteria of the MALT-type lymphoma: the proliferation of centrocyte-like and lymphoplasmacytic cells, lymphoepithelial lesions, and the presence of germinal centers. Primary lymphoma of the larynx is a rare condition. Most of the reported low-grade lymphomas and the pseudolymphomas probably belong to the category of MALT-type lymphoma. Remission can be obtained by surgery, radiotherapy, and polychemotherapy.

[Mucinous adenocarcinomas of the scalp. Anatomo-clinical, histochemical and ultrastructural study of a case and a review of the literature]. / L'adénocarcinome mucineux du cuir chevelu. Etude anatomo-clinique, histochimique et ultra-structurale d'un cas et revue de la littérature.

The third recurrence of a primary mucinous adenocarcinoma of the right parietal scalp was studied by histochemistry and electron microscopy. Histochemically the mucin produced by this neoplasm was of the sialomucine type. Electron microscopy revealed a high differentiated tumour whose cells looked like eccrine mucinous ones. The natural history of this carcinoma is similar to that of 33 ones already published. The tumours, round and elevated, grow in 75 p. 100 of the cases in patients over 50 years of age. They are located on the face or the scalp and more rarely on the trunk. Such tumours are frequently misdiagnosed as carcinomas. But the knowledge of thier morphological and histochemical features should lead to the right diagnosis all the more since the various biological and radiological investigations do not discover other primary neoplasm. Besides if these neoplasms are not metastases they are quite different from the other sweat gland carcinomas. They have a better prognosis than these tumours. However they give local recurrences, lymph node or subcutaneous metastases and a fatal issue in 6 p. 100 of the cases.