ALK and anaplastic large cell lymphoma: Primary gastric ALCL‐ALK+ patients exhibited older age of onset (Table 5), inferior OS (median OS: 7.0 months vs. 83.0 months, P < 0.001, Figure 7A) and CSS (median CSS: 8.0 months vs. not reached, P < 0.001, Figure 7B) compared with non‐gastric ALCL‐ALK+ patients.