Cranial fasciitis resembling infantile fibrosarcoma differentiated by genetic assay

tions should be undertaken to clarify it. Fortna and Junkins-Hopkins have reported a case of locally aggressive subcutaneous LCH that required the excision of underlying skeletal muscle. In our case, the tumor was well demarcated clinically and not adhesive to adjacent tissue. Histological findings revealed that the tumor was encapsulated by fibrous connective tissue. Fortunately, there has been no finding of local recurrence, similar to the other Japanese cases. We should recognize the clinical entity of subcutaneous LCH and the existence of locally aggressive cases, though they may be rare. We should also take subcutaneous LCH into consideration as a differential diagnosis of a subcutaneous nodule, especially one that occurs on the extremities and face.