Reinbach has found them in a case of lymphosarcoma with metastases in the bone-marrow.
Medullary carcinoma is more frequently accompanied by metastases than the other forms.
If operation is deferred, metastases of the tumour will have occurred, and operation will be too late.
The neighbouring lymph glands are infected early, but metastases to other organs are not common.
After such free removal these tumours show little tendency to recur and metastases are rare.
Although these tumours have been known to give rise to metastases, they are, as a rule, innocent and are to be treated as such.