Table 2. Overall frequency of dissection of each level and identification of lymph node metastasis at that level Table 2. Overall frequency of dissection of each level and identification of lymph node metastasis at that level Table 2. Overall frequency of dissection of each level and identification of lymph node metastasis at that level Table 2. Overall frequency of dissection of each level and identification of lymph node metastasis at that level
Neck Level Dissected Frequency of dissection of each level (n=63) Frequency of identification of LN metastasis (n=63) % pN+ve
I 4 3 75
II§ 63 55 87.3
III 63 18 28.6
IV 63 3 4.8
V 7 1 14.3
Total 200 80 40
§Level II was subdivided into IIA and IIB in 26 of the 63 dissection specimens; LN metastasis was found in 24 of 26 IIA specimens and in 3 of 26 IIB specimens, all of which had concurrent IIA disease. §Level II was subdivided into IIA and IIB in 26 of the 63 dissection specimens; LN metastasis was found in 24 of 26 IIA specimens and in 3 of 26 IIB specimens, all of which had concurrent IIA disease. §Level II was subdivided into IIA and IIB in 26 of the 63 dissection specimens; LN metastasis was found in 24 of 26 IIA specimens and in 3 of 26 IIB specimens, all of which had concurrent IIA disease. §Level II was subdivided into IIA and IIB in 26 of the 63 dissection specimens; LN metastasis was found in 24 of 26 IIA specimens and in 3 of 26 IIB specimens, all of which had concurrent IIA disease.