Chondroblastic osteosarcoma of the nasal cavity: an exceptional and misdiagnosed presentation.

Chondroblastic osteosarcoma of the nasal cavity is a rare and aggressive tumor that presents diagnostic challenges due to its variable clinical and radiological features. Histological analysis is crucial for an accurate diagnosis, despite morphological similarities with chondrosarcoma. We present a case of primary craniofacial chondroblastic osteosarcoma originating from the nasal cavity in a 17-year-old adolescent. The tumor was characterized by cartilaginous lobules and spindle cell proliferation with osteoid matrix deposition. Immunohistochemical analysis supported the diagnosis. This case highlights the rarity of this particular presentation and emphasizes the significance of accurate diagnosis through histopathological evaluation to achieve optimal management.

Primary laryngeal tuberculosis mimicking laryngeal carcinoma: CT scan features.

Laryngeal tuberculosis is a rare disease. It is almost always associated with pulmonary tuberculosis. It occurs generally in adults without BCG vaccination or in cases of the acquired immune deficiency syndrome. On laryngoscopy and imaging, it often simulates laryngeal carcinoma, and confirmation is always histological. We report the case of a 36-year-old man who presented to our hospital with dysphonia and dysphagia. Laryngoscopy revealed a lesion of the left vocal cord and the ventricular strip. CT scan found focal, regular thickening of the left vocal cord, associated with irregular thickening of the posterior laryngeal wall. A biopsy confirmed the diagnosis of tuberculosis.

[Isolated congenital left ventricular diverticulum: report of a paediatric case]. / Le diverticule cardiaque gauche congénital isolé: à propos d'un cas pédiatrique.

Congenital cardiac diverticulum is a rare malformation formed by an outpouching of the ventricular wall, in particular the left ventricle. The thoraco-abdominal type is more frequent than the isolated thoracic type. Topographical and imaging considerations regarding an isolated congenital left ventricular diverticulum incidentally discovered in a 9-year-old-boy are reviewed.

[Persistent mullerian duct syndrome with transverse testicular ectopia: a rare association]. / Syndrome de persistance du canal müllérien avec ectopie testiculaire transverse: une association rare.

Persistent mullerian duct syndrome with transverse testicular ectopia is a very rare pathological association, often fortuitously discovered in boys during repair for inguinal hernia or cryptorchidism. The authors present the case of an 15 year old adolescent with cryptorchidism, in whom ultrasonography of the right iliac fossa showed 2 testicles and a uterus. Surgical exploration confirmed the diagnosis.