[Incidence rate, epidemiology of sarcoma and molecular biology. Preliminary results from EMS study in the Rhône-Alpes region].

Sarcomas comprise a heterogeneous group of mesenchymal neoplasms. They can be grouped into 3 general categories, soft tissue sarcoma, visceral and primary bone sarcoma, which have different staging and treatment approaches. Soft tissue sarcomas are typically classified on the basis of genetic alterations and light-microscopic examination of hematoxylin-eosin-stained tissue, in which recognizable morphological characteristics of normal tissues are identified.

Collagenous spherulosis mimicking keratinizing squamous metaplasia in a borderline endometrioid tumour of the ovary.

Aims: Collagenous spherulosis (CS) is a rare lesion which is an incidental finding in breast and salivary glands. It is characterized by fibrillar spherules exhibiting an intrinsic radiating or concentric pattern which are surrounded by myoepithelial cells. This entity can be misdiagnosed as adenoid cystic carcinoma and in-situ ductal carcinoma.

[Peutz-Jeghers syndrome. A case in an adolescent].

The Peutz-Jeghers syndrome includes periorificial melanin spots and digestive adenoma, transmitted according to an autosomal dominant mode. We report on a case discovered in a 13 year-old girl presenting with anaemia.