[Neurosarcoma of the submandibular gland arising in a pleomorphic adenoma. Apropos of a case]. / Neurosarcome de la glande submandibulaire développé sur un adénome pléomorphe. A propos d'un cas.

A 71-year-old woman consulted for a tumor of the right submandibular gland that had been present for 4 years and had rapidly increased in size during the last two months. Histological examination of frozen sections and immunohistochemistry concluded to a poor differentiated sarcoma probably a neurosarcoma with residual pleomorphic adenoma component. In spite of wide resection, local recurrences with nodes and lung metastases occurred leading to the death of the patient. We think interesting to report this unusual salivary tumor and to discuss its pathological features.

[Acute pyelonephritis and subcapsular hematoma revealing nephroblastoma at the age of 15 years]. / Pyélonéphrite aiguë et hématome sous-capsulaire révélant un néphroblastome à l'âge de 15 ans.

BACKGROUND: Nephroblastoma' the most common renal tumor in children between 1 and 5 years, occurs rarely in the oldest child. CASE REPORT: A 16-year-old teenager suffered from acute pyelonephritis caused by Klebsiella pneumoniae. Renal ultrasonography showed a left subcapsular hematoma; the CT scan confirmed the finding and also showed renal scarring. However, a second CT scan showed pulmonary nodules suggestive of metastasis, a diagnosis that was confirmed by needle biopsy of pulmonary lesions. Recovery was obtained after chemotherapy and nephrectomy with a 3-year-follow-up. CONCLUSION: This nephroblastoma was particular because its development in an adolescent, its association with acute pyelonephritis and subcapsular hemorrhage.