Table 10. Lymphocytic thyroiditis or thyroid tumor with focal thyroiditis?
(Proliferation of oncocytes and/or great number of nuclear grooves on the smear)
.
CLOSE
Favouring
benign
lesion
Favouring
tumor
Not specific
Number of lymphocytes
numerous
none or only a few
Number and size of the lesions on US
more than 2
(irrespective of their size) *
only one, greater than
2 cm
Shape of the lesion on US
irregular
*
regular
Cell type with grooves
non- metaplastic
*
oncocyte