[Solitary bony plasmocytoma of the mandible]. / Plasmocytome solitaire osseux de la mandibule.

INTRODUCTION: Solitary plasmocytoma is a rare malignant tumor, belonging to the larger family of plasma cell proliferative diseases observed in bones. The mandible localization reported here is extremely rare. CASE REPORT: A 57-year-old man consulted for a tumefaction of the right mandible. Physical examination revealed a mandibular tumor with an osseous consistency covered by a healthy mucous. Radiologically, the tissue processed from the mandible, which presented a defect and an eroded cortical. Hemimandibulectomy was performed. Pathologic examination of the operative specimen demonstrated plasmocytoma. Complementary radiotherapy was performed. Outcome at 13 months was favorable, without recurrence of multiple myeloma. DISCUSSION: Plasma cell tumors are rare, about 10% of them are solitary plasmocytomas observed in intra- or extramedullar sites. Pathology is required for confirmation. An exhaustive assessment is needed to rule out multiple myeloma. Most solitary forms are observed in the spine. Appropriate treatment combines surgery and radiotherapy. Careful surveillance is required because of the frequent progression to multiple myeloma.

[Orbital osteoma: clinical evaluation of nine cases]. / Les ostéomes orbitaires: évaluation clinique de neuf cas.

INTRODUCTION: Osteoma of the nasosinus cavities, particularly the frontoethmoidal cavities, is often a fortuitous radiographic discovery. Potential complications include ophthalmological, sinusal, and endocranial disorders. MATERIAL AND METHODS: Nine patients (five men and four women), mean age 24.3 years (18-43) presenting orbital osteoma were managed from 1994 to 1999. RESULTS: Clinical signs were dominated by ophthalmological disorders, basically non-reducible exophthalmia (n = 8). Two patients had permanent unilateral nasal obstruction and one had acute sinusitis. The bony orbital tumefaction was located in the superior medial angle in five patients. Radiography (Blondeau view) demonstrated an opacity in the sinus with an orbital extension. Computed tomography, performed in all patients, identified the lesion location: ethmoidofrontal (n = 4), anterior ethmoidal (n = 2), frontal (n = 2), ethmoidomaxillary (n = 1). There were no endocranial extensions. Surgery was undertaken for eight patients generally via the transfacial approach (n = 7); a bicoronal approach was used for one patient. En bloc resection (n = 4) or fragmentation (n = 4) was performed. There was one postoperative complication: regressive diplopy. These patients have been followed regularly with clinical and radiographic explorations and have been free of relapse for 2 to 6 years. DISCUSSION: Frontoethmoidal osteoma is a relatively rare benign tumor. Severity depends on the orbital and endocranial extension. Imaging provides the positive diagnosis and guides the surgical approach. Therapeutic indications depend on the tumor size, its course, and the development of complications. We observed total relapse free outcome after complete resection.