"multiple tumors" is correct and usable in written English.
For example, you could use it in a sentence like "The patient was diagnosed with multiple tumors in her stomach."
Smitten with multiple tumors, he continued to operate on patients.
The Mahars understandably worry that Katie will one day have to have multiple tumors cut out of her face.
Multiple tumors can be seen in the setting of CYLD tumor suppressor gene mutations.
Somatic mutations in PTEN occur in multiple tumors, most markedly glioblastomas.
Moreover, researchers believe there could be numerous common genetic variants involved in the development of multiple tumors, as yet unidentified.
IGF1 plays a key role in the development and growth of multiple tumors and in the prevention of apoptosis.
Nineteen patients (42%) had multiple tumors.
However, CT and MRI revealed multiple tumors with ring enhancement.
PD-L1-targeting MAbs are also efficacious in multiple tumors.
The anticancer immune response of TLP against multiple tumors [81] has been improved by CNTs.
Regional activity distribution is not considered and also the handling of multiple tumors is not feasible.
