I know it's not benign. It's got to be a malignant tumor.

我知道这不是良性的。肯定是恶性肿瘤。

Now, among malignant tumors, the most common one is osteosarcoma.

，在恶性肿瘤中，最常见的是肉瘤。

In July of 2004, he undergoes surgery to remove a malignant tumor in his pancreas.

2004年7月，他接受了胰腺恶性肿瘤的切除手术。

A blood test for cancer antigen 125 might be done to rule out a malignant ovarian tumor.

抽血检查肿瘤抗原125可用来排除恶性肿瘤。

Malignant tumors typically cause a chronic inflammatory response which leads to fever, night sweats, and weight loss.

恶性肿瘤通常会引起慢性炎症反应，导致发热、盗汗和体重减轻。

The malignant type of serous tumors are called serous cystadenocarcinomas, and malignant mucinous tumors are called mucinous cystadenocarcinomas.

恶性浆液性肿瘤被为浆液性囊腺癌，而恶性黏液性肿瘤也黏液性囊腺癌。

Compared with benign tumor cells, a distinguishing feature of malignant tumor cells is that they have slightly less organized nuclei.

与良性肿瘤相比，恶性肿瘤的特征是其拥有稍微不规则的胞核。

It's got to be a malignant tumor.

应该是恶性肿瘤。

Surgery might be enough for malignant tumors confined to the ovary, whereas chemotherapy may be needed for disease that spread.

手术足以治疗仅局限于卵巢内的肿瘤，而化疗则是针对癌细胞已经发生扩散的情况。

But some become malignant tumors or cancers, and these are the ones that break through their basement membrane and invade nearby tissues.

但有成了恶性肿瘤细胞，即癌细胞：它们穿破基底膜，侵犯邻近组织。

Overall, the most common malignant tumor is a medulloblastoma, which typically forms in or around the cerebellum, adjacent to the fourth ventricle.

总体而言，最常见的儿童恶性脑肿瘤是髓母细胞瘤；它们通常在第四脑室旁的小脑内或周围形成。

Benign tumors can be surgically removed if they're causing symptoms, while the treatment for malignant tumors requires radiotherapy, chemotherapy, and surgery.

如果良性肿瘤引起临床症状，可以手术切除，而恶性肿瘤的治疗需要放疗、化疗和手术。

Through a process called metastasis a malignant tumor's cells will eventually break off, travel throughout the body, and begin forming tumors in other regions.

通过转移，恶性肿瘤的细胞最终会断裂，然后遍布全身，并开始在其他区域形成肿瘤。

Surgery might be enough for malignant tumors confined to the ovary, whereas chemotherapy might be needed for disease that has spread.

对于卵巢内的恶性肿瘤，手术可能就足够，对于已发生转移的卵巢癌可能还需要化疗。

A third class of tumors are called borderline tumors because they have features that are intermediate between the other benign and malignant tumors.

第三类肿瘤是中性肿瘤，因为其特点介于其他良性和恶性肿瘤之间。

As the cancer cells divide they can sometimes gain the ability to penetrate through the basement membrane, and at that point it's considered a malignant tumor.

当癌细胞分裂时，它们有时能获得穿透基底膜的能力，此时便被认为是恶性肿瘤。

Now, while medulloblastoma may be the most common malignant tumor, the most common primary pediatric tumor is a type of astrocytoma called a juvenile pilocytic astrocytoma.

尽管髓母细胞瘤可能是最常见的恶性肿瘤，最常见的儿童原发脑肿瘤是一种星形细胞瘤，为青少年毛细胞型星形细胞瘤。

Compared with benign tumor cells, malignant tumor cells have key features like not having a clearly defined border or like a slightly less organized nuclei.

和良性肿瘤相比，恶性肿瘤有一典型特征，比如边界不清且结构紊乱的细胞核。

A malignant tumor is composed of cells that invade the basement membrane and invade or spread to other parts of the body.

恶性 肿瘤是由该侵入基底膜并侵入或扩散到身体的其他部位的细胞。

Frequently, they are completely enclosed in a capsule of tissue and they typically do not pose danger to human life like malignant tumors (cancer) do.

它们（指良性）经常有完整的包膜，它们通常不像恶性肿瘤（肿瘤）样对人类生命构成危险。