From: Surgical anatomy of the internal thoracic lymph nodes in fresh human cadavers: basis for sentinel node biopsy
Hemithorax
Retrocostal space
Right n (%)
Left n (%)
Second (17)a
5 (29.4)
3 (17.6)
Third (19)
7 (36.8)
Fourth (19)
1 (5.2)
2 (10.5)