Liposarcome mixte, bien différencié et myxoïde, de la paroi thoracique

The World Health Organization classifies liposarcomas into five subtypes: well-differentiated, myxoid, round cell, polymorphous, and dedifferentiated. In 5 to 10% of cases, several types of liposarcomas coexist within the same mass and represent the mixed type. Well-differentiated and myxoid liposarcomas are by far the most commonly associated in limbs. A chest-wall localization is rare. We report a case of liposarcoma showing biphasic features, radiologically and histologically. This 22 × 17 × 8.5 cm tumor weighing 1250 g was identified in the intramuscular left lateral chest was in an 80-year-old patient. CT scan revealed a biphasic mass composed of body fat and tissue. The histological diagnosis was a mixed type liposarcoma consisting of well-differentiated liposarcoma and myxoid liposarcoma. Through this observation and data from the literature, we discuss the pathological and radiological aspects of mixed liposarcoma.