[Osteoclast-type giant cell tumor of the parotid gland]. / Tumeur à cellules géantes de type ostéoclastique de la parotide.

INTRODUCTION: Osteoclast-type giant cell tumors of the salivary gland are extremely rare; only 23 cases have been reported. Two presentations were observed: isolated tumor or tumor associated with a carcinomatous contingent. CASE REPORT: A 51-year-old female patient consulted for a painless left retro-angulo-mandibular swelling having appeared 2 years before. This was a 2 cm parotid mass without facial nerve palsy or cervical lymphadenopathy. The patient underwent a superficial parotidectomy to remove the nodule. The direct microscopic examination revealed an osteoclastic giant cell tumor without any carcinomatous contingent. At immunohistochemistry, mononuclear cells were diffusely and intensely stained by anti-pancytokeratin, while multinucleated cells were totally negative and CD68 positive. The patient was not given any complementary treatment. She was followed-up 23 months later and did not present any signs of recurrence or metastasis. DISCUSSION: The histogenesis and nosology of osteoclastic giant cell are currently unknown. Although this entity was not integrated into the latest WHO classification, most authors consider it as a variant of carcinoma. Published data on the epithelial or histiocytic nature of multinucleated cells is not consensual. Our case presentation supports the hypothesis of a histiocytic differentiation of giant cells and epithelial mononuclear cells.

[Intrathoracic lymphadenopathy: an unusual manifestation of rheumatoid arthritis]. / Les adénopathies intrathoraciques: une manifestation méconnue de la polyarthrite rhumatoïde.

Lung disease is the most frequent extra-articular manifestation of rheumatoid arthritis. It is detected in nearly 50% of patients with this multisystem affection, his knowledge has benefited from advances in computed tomography (CT). The inflammation can affect the pleura, the airways and the lung parenchyma. Intrathoracic lymphadenopathy complicating rheumatoid lung are not usual, and then pose the problem of differential diagnosis. We report a 51-year-old man, with a history of tobacco intoxication, suffering from rheumatoid arthritis who developed an interstitial lung disease at stage of fibrosis with mediastinal and hilar adenopathy. We will discuss the clinical, paraclinical, evolutionary and therapeutic particularities case.