[Gastrointestinal Stromal Tumors "GIST": status and news through our experience on 54 cases and review of literature]. / Tumeurs Stromales Gastro-Intestinales «GIST¼: état des lieux et actualités à travers notre expérience portant sur 54 cas et une Revue de littérature.

Tumors Gastrointestinal Stromal "GIST" are a very rare form of digestive tract cancers belonging to the family of sarcomas. The aim of this study is to establish the epidemiological profile, the diagnostic and therapeutic difficulties of this malignancy supported in a developing country. A retrospective study spread over 8 years from January 2002 to March 2010, was conducted at the Department of Radiotherapy and Oncology of Casablanca (Morocco) have collated 54 cases of Gastrointestinal Stromal tumors. The average age of our patients was 55 years. The average time of evolution was 11 months (0-72 months). The biopsy confirmed the diagnosis in 14 cases and surgery in 40 cases. The main histological form was fusiform (92.6%). GIST in our series had an average tumor size of 12.5 cm with a positive C-Kit in 52 cases. The risk of progression was established in 47 cases of which 39 were high risk. Surgery was the main treatment of patients in our study. After a mean fellow of 31 months, half of evaluable patients in our series (n = 19) is maintained complete remission, one third (n= 13) died while a quarter (n= 8) has a local recurrence and / or metastatic. Although the recommendations are published for the treatment of these tumors, these still present many problems both diagnostic and therapeutic in our context.

[Subcutaneous myxoid liposarcoma]. / Liposarcome myxoide sous cutané.

Although myxoid liposarcomas (MLS) are the most common type of soft-tissue sarcomas in adults, their primary location in the superficial tissues is rare. So sarcomas are classified as superficial and deep-seated. They are distinct based on their location and their frequency as well as their prognosis which is relatively better in superficial sarcomas. We here report the case of a patient with subcutaneous liposarcoma in the right thigh. The diagnosis was confirmed by histology after clinical symptoms had evolved over 1 year. Treatment involved wide surgical resection followed by locoregional radiation therapy. Patient's evolution was marked by complete remission maintained after 32 months follow-up. This study highlights that superficial sarcomas are rare and this can cause a delay in diagnosis compromising their prognosis.