ONCE AGAIN, there are 5 people in front of kakashi here!
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Not just chouza and kakashi, but others are there too
they got attacked too seen here
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and here
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The 3 others obviously got knocked out leaving just chouji, chouza and kakashi to fight, but there are others injured there, hence why tsunade said "them"
also when chouhi asked about kakashi, she went silent!
she also has a shocked and face, and then upset face when the slug tells her about kakashis condition.
she is a legendary healer, the only thing she cannot heal is old fashioned death, if she can heal everything else (which she can) thered be no need in this theatrical facial expressions of shock, anger and sadness.
If he is alive then i dont know why tsunade is pulling faces about kakashis condition, maybe shes constipated, who knows.