Takayasu's arteritis exposes to complications of varying severity, such as arterial stenosis, thrombosis, and more rarely aneurysms. Aortic dissection is a rare complication of Takayasu's disease, reported in few times in the literature, only 7 of which concern the abdominal aorta. We report the case of a 41-year-old woman followed for Takayasu disease for 15 years, who presented an asymptomatic and chronic dissection of the abdominal subrenal aorta. The patient underwent conservative medical treatment. After a follow-up of 17 months, the aortic dissection was still asymptomatic, with a stable appearance on follow-up imaging. To our knowledge, this is the first case report of asymptomatic aortic dissection as a rare complication of Takayasu disease.

Osteoblastoma is a rare benign tumor arising predominantly in the vertebrae or long tubular bones. Its naso-sinusian origin is rare and can be responsible for ophthalmological complications [1]. We report the case of 19-yeaold patient admitted to the Ophthalmology department for progressive right exophthalmia and ptosis evolving over 8 months. The diagnosis of osteoblastoma was suspected on CT and MRI imaging and then confirmed by the anatomopatological studies. Total surgical excision was performed. Clinical and radiological evolution has been favorable.

Polymicrogyria is a malformation characterized by an abnormality in late neuronal migration and cortical organization, that causes usually recurrent seizures and or status epilepticus. It results from a combination of genetic and non-genetic factors. We report a case of bilateral perisylvian polymicrogyria in an infant with status epilepticus.

Sjögren's syndrome is an autoimmune disease. This means that the immune system attacks parts of your own body by mistake. It attacks the glands that produce tears and saliva. We report the case of a 51 -year-old woman who presented with bilateral parotid gland enlargement as the initial manifestation of primary Sjögren syndrome.

The mandible is an unusual localisation of the Ewing sarcoma, Only 1% of cases are reported with mandibular involvement. This case report aims to make clinicians, especially dentists aware of the neoplastic origin of rapidly enlarging intraoral or extraoral swellings that can simulate an odontogenic infection, for adequate and early management.