BACKGROUND
The latissimus dorsi (LD) muscle has a dominant pedicle with one thoracodorsal artery and receives sufficient blood by segmental circulation through several perforators. Thus, it is widely used in various reconstructive surgeries. We are reporting on the patterns of the thoracodorsal artery analyzed by chest CT angiography.
PATIENTS AND METHODS
We analyzed the preoperative chest CT angiography results of 350 patients scheduled to undergo LD flap breast reconstruction following complete mastectomy for breast cancer between October 2011 and October 2020.
RESULTS
700 blood vessels were classified according to the KNUPS TDA classification, 388 (185 Rt. and 203 Lt.), 126 (64 Rt. and 62 Lt.), 91 (49 Rt. and 42 Lt.), 57 (27 Rt. and 30 Lt.), and 38 (25 Rt. and 13 Lt.) vessels were classified as Type I, II, III, IV, and V, respectively. Among 350 patients, 205 patients showed matching types for Lt. and Rt. vessels, whereas 145 patients showed mismatching types. For 205 patients with matching types, the distribution by type was 134, 30, 30, 7, and 4 patients with Type I, II, III, IV, and V, respectively. For 145 patients with mismatching types, the distribution by different combinations was 48, 25, 28, 19, 2, 9, 7, 3, 1, and 3 patients with Types I+II, I+III, I+IV, I+V, II+III, II+IV, II+V, III+IV, III+V, and IV+V, respectively.
CONCLUSIONS
While there is some diversity in the vascular anatomical structures of the LD flap, the dominant vessel can be found in a similar location in almost all cases and no flap had absence of a dominant vessel. Therefore, in surgical procedures using the thoracodorsal artery as the pedicle, preoperative radiological confirmation is not absolutely necessary; however, due to variants, performing the surgery with an understanding of this aspect should lead to good outcomes.