英语语法分析

Secondary malignant tumors can occur by hematogenous spread or direct invasion.

继发的恶性肿瘤可以是血行转移或直接侵犯而来。

There were 14 cases of hematogenous osteomyelitis and 53 cases of traumatic osteomyelitis.

其中血源性骨髓炎14例，创伤性骨髓炎53例。

This pattern is a manifestation of hematogenous spread of tuberculosis and metastatic disease.

该型是结核和转移性疾病血源性播散的表现。