RESUMO
The authors present an interesting case of a suckling baby treated for forearm tumour. All the preoperative examinations including the imaging methods are documented, as are the surgical procedures and the final results. The case report is interesting not only because such surgery is infrequent but also due to the unpredictable progress of the final diagnosis statement. Before surgery the tumour was diagnosed as an organising haematoma; based on clinical and radiological signs the diagnosis subsequently rose to rapidly growing haemangioma or vascular malformation causing arm paresis and vascular supply disorder. The diagnosis was changed to angiolipoma during surgery. The final histopathological statement was: infantile fibrosarcoma. Despite the virtue of imaging methods and meticulous clinical examination, the surgical and histopathological findings are not necessarily absolutely identical. Having presented this particular case the authors would like to share their experience.