Oral Presentation - 31
Surgical treatment of childhood inflammatory myofibroblastic tumors
Tutku Soyer 1, Beril Talim 2, İbrahim Karnak 1, Saniye Ekinci 1, Fatih Andıran 1, Arbay Özden Çiftçi 1, Diclehan Orhan 2, Canan Akyüz 3, Feridun Cahit Tanyel 1
1 Hacettepe University Faculty of Medicine Department of Pediatric Surgery
2 Hacettepe University, Faculty of Medicine, Department of Pediatric Pathology
3 Hacettepe University, Faculty of Medicine, Department of Pediatric Oncology
Aim: A retrospective study was performed to evaluate the results of surgical treatment of childhood inflammatory myofibroblastic tumors (IMT).Methods: Between 1977-2015, patients underwent surgical treatment for IMT were evaluated retrospectively for age, sex, presenting symptoms, physical examination findings, diagnostic methods, treatment features, histopathologic findings and the results of surgical treatment. Results: Twenty-two patients were included. Male to female ratio was 15:7 and the mean age of the patients was 7.4 years (1-14 years). Presenting symptoms were respiratory difficulty, cough(n=8;36.3%), abdominal pain, vomiting(n=7;31.8%), weight loss(n=2;9.09%), palpable mass(n=2;9.09%), rectal bleeding(n=1;4.5%) and jaundice(n=1;4.5%). Localizations of tumors were lung (n=8;36.3%), small-large bowel (n=4;18.18%), spleen (n=3;13.6%), liver-biliary tract (n=2;9.09%), esophagus (n=1;4.5%), mesentery (n=1;4.5%) and mediastinum (n=1;4.5%). The mean size was 5.6 cm (1-12 cm) and 6 patients diagnosed with preoperative tru-cut biopsy. Lung lobectomy (right lower; n=6, left lower; n=1, right upper-lower; n=1), total resection of mass with adjacent bowel (n=4), splenectomy (n=3, partial splenectomy in 1 case), liver lobectomy (n=1), portoenterostomy(n=1), cervical esophagostomy and distal esophagectomy(n=1), bronchoscopic extraction(n=1) and incomplete resection(n=3). Incomplete resection was performed in mass with closely adjacent to atrium, duodenum and mediastinal structures. In histopathology evaluation, surgical margins were free of tumor in 10 cases, positive in 7 cases and unknown in 5 cases. ALK positivity was detected in 8 cases, negative in 2 cases and did not evaluated in cases operated before 2000. Regrowth of residual mass was seen in three ALK (+) cases and these cases received chemotherapy. The mean follow-up period was 119.5 months (5 months-30 years). Conclusion: IMT is a rare tumor of childhood with wide spectrum of clinical findings because of variable localization. Surgical treatment is the first choice of treatment and regrowth of residual mass with ALK positivity is indication of medical treatment. Long-term survival of patients was favorable in patients with total resection.