Table 2.

Diagnosis and first-time tumor detection.

Confirmation of pathological diagnosis, n (%)
Surgery without NAC *	5 (55.6)
Surgery after NAC	2 (22.2)
EUS-FNA †	2 (22.2)
Final tumor size, n (%) ‡
0 mm §	3 (33.3)
1–10 mm	1 (11.1)
11–20 mm	3 (33.3)
≥21 mm	2 (22.2)
First-time tumor detecting image modality
CT, n (%)	4 (44.4)
No detection in any images, n (%) ||	3 (33.3)
EUS, n (%)	2 (22.2)

* Neoadjuvant chemotherapy, ^† inoperable patients, ^‡ four patients assessed using EUS images, ^§ CIS, ^|| all cases were patients with CIS. Abbreviations: CIS, carcinoma in situ; CT, computed tomography; EUS, endoscopic ultrasound; EUS-FNA, endoscopic ultrasound-guided fine needle aspiration; NAC, neoadjuvant chemotherapy.