Giant myxoid retroperitoneal liposarcoma in a 41-year-old patient: A case report

INTRODUCTION: Retroperitoneal Liposarcomas (RL) are a rare form of malignant tumors, they encompass just 5 % ot these and mainly present in female adults between 50 and 60 years of age. They can be divided into 4 morphological subtypes: 1) well-differentiated, 2) undifferentiated, 3) myxoid, and 4) pleomorphic. CASE PRESENTATION: 41-year-old male who present to the outpatient consult of oncological surgery after being diagnosed via imaging with a giant retroperitoneal liposarcoma. The patient reported unsuccessful weight loss attempts and subsequently noticed an increase in abdominal size as well as the development of ulcers in the lower limbs. He underwent radical resection, which included a right nephrectomy, as the primary treatment. DISCUSSION: Giant retroperitoneal liposarcomas are defined as those 30 cm in diameter or more or 20 kg or more in weight are considered “giants” and are extremely rare. The only treatment involves resection of the tumoration and those adjacent involved organs, and sometimes, uninvolved ones. Due to the high risk of recurrence, adjuvant therapy may be provided as well as imaging follow up. CONCLUSION: RL are a complicated entity to manage. They tend to present high rates of recurrence due to the difficulty of performing a full resection without positive margins. These patients should be thoroughly studied before surgery and appropriate follow-up should be provided.