Teratoma With a Malignant Somatic Component in Pediatric Patients: The Associazione Italiana Ematologia Oncologia Pediatrica (AIEOP) Experience

Background. Teratoma with a malignant somatic component (TMSC) is rare but described in adults, whereas information on pediatric presentation is sparse Procedure. The Associazione Italiana Ematologia Oncologia Pediatrica identified 14 cases of TMSC Clinical files and pathology specimens were reviewed Results. The series (9 female, 5 male) showed the following disease testis (2), sacrococcygeal (3), ovary (3), retroperitoneum (3), mediastinum (2), and foot soft tissue (1) Distribution of the somatic component vas carcinoma (4), pancreatic neuroendocrine tumor (1), neuroblastoma (3), rhabdomyosarcoma (3), rhabdomyosarcoma plus liposarcoma, chondrosarcoma, neurogenic sarcoma (1), chondrosarcoma plus neuroectodermal sarcoma (1), malignant peripheral nerve sheath tumor(1) Three patients where in stage I, four in stage II, three in stage III, and four in stage IV All but one patient patient underwent surgery and only showed carcinoma components Nine patients relapsed or progressed and eight died Six patients are alive and disease-free Two patients underwent complete resection and four were treated based on transformed histologies Relapse-lice and overall survival rates were 35.7% and 42.8%, respectively (median follow-up, 3 1 months) Conclusions. Prognosis for germ cell tumors (GCTs) containing MSC is worse than that for GCTs The pediatric disease appears to be more heterogeneous in tumor site distribution and MSC histology than in adults Our series suggests no effects of age, histology, or gender on outcome Surgery has an essential role in localized disease, with complete resector highly desirable Chemotherapy optimized for histology should include reagents directed to the somatic malignancy, if chemosensitive Malignant GCT warrants GCT-directed chemotherapy Pediatr Blood Cancer 2010,54 532-537 (C) 2010 Wiley-Liss, Inc