Objectives: Describe the demographic variables, types of liver tumor, surgeries performed and survival children diagnosed with liver tumor undergoing surgical treatment.Method: A retrospective analysis was performed in patients with pediatric liver tumors undergoing surgical treatment, from January 2010 to December 2015 at the "General Oncology Hospital. Solon Espinoza Ayala”. Results: Data from our study reported a diagnosis of hepatoblastoma in 51.85% of all pediatric liver tumors; 50% are routine controls without evidence of disease, 14.28% have been completed clinical treatment, 21.42% died from a second primary diagnosis with metastasis, and another 14.28% (only surgery) who were not followed up because they were transfers from another health system; with respect to global survival it was 64%. The ages ranged from 0 to 15 years old with an average of 5.5. Conclusion: It is very important a timely detection and adequate treatment by a specialized center and trained professionals, liver surgery is a very important chapter for the treatment of liver tumors. The surgical approach with tumor-free resection along with multidisciplinary treatment is the goal for healing.

OBJECTIVES: Description of different types of surgeries performed most frequently by a Pediatric Oncologist Surgeon. METHOD: Retrospective analysis of pediatric patients with oncological pathology who underwent surgical treatment by a Pediatric Oncologist Surgeon in the city of Quito – Ecuador, from July 2005 to October 2016. RESULTS: For the present study, a total of 2075 surgeries were identied, classifying them according to areas of the body; resulting in the most demanded surgeries with 62.93% thoracic surgeries, secondly with 13.25% (275) were abdominal surgeries; neck surgeries occupy third place with 7.13% (148), fourth with 6.50% (135) skin-related surgeries; Inguinal region occupies the fth place with 2.31% (48), surgeries performed in the oral cavity in sixth place with 1.44% (30) and lastly with 6.40% (133) we nd several surgeries such as Catheter Picc Line ttings, excision and tumor biopsies of limbs, cleaning and surgical review of areas that are not mentioned before. CONCLUSION: In medicine it is important to an oncological pathology the timely detection and appropriate treatment by specialized and trained professionals in a given area. The lack of specialists in Pediatric Oncological Surgery is evident; in Quito - Ecuador during the years of the present study there was only one specialist who with his scientic contribution, surgical ability and multidisciplinary team in oncology improved the quality and lifestyle of patients and family members; In addition, with this study, a precedent is created in an area as delicate as cancer surgery of children.

OBJECTIVES: Describe the main signs and symptoms of this type of tumors, as well as their appropriate treatment and post-surgical monitoring. METHOD: A retrospective study was carried out, a clinical case in adolescent patients since their detection, diagnostic tests, surgery, until their post-surgical follow-up. RESULTS: It is a female patient, 16 years old, mixed race who has symptoms of epigastralgia radiating back accompanied by nausea, vomiting and diarrhea; laboratory: reported blood test, chest Rx and normal tumor markers (AFP and BHCG); Simple and proven CT revealed occupational mass originated in the body of the pancreas. He underwent Corpo-pancreatectomy Surgical treatment, Postoperative satisfactory; 1 year of asymptomatic patient surgery. CONCLUSION: Pseudopapillary Solid Tumor of the Pancreas or Frantz's Tumor is a very rare tumor, with a low degree of malignancy, usually encapsulated. The diagnosis is mainly given by nding images; US (ultrasonography) and CT (Computerized Axial Tomography) as is the case with our patient. Complete tumor resection is the treatment of choice, preserving as much pancreatic tissue as possible.