[Benign mediastinal hemangiomas].

Haemangiomas represent a very rare form of primary mediastinal tumour. Their benign character, though rare, should not allow one to forget that their excision is correct, though sometimes tricky on account of their special anatomic situation. Two new observations are reported here as evidence of this difficulty. The prognosis, save for a few exceptional cases of local recurrence as in one of the cases sighted here is always good.