大家好，我是你们的医学专家朋友，今天我们要聊一个有点“懒”的话题——那些血行转移少见的癌症，是的，你没听错，有些癌症就是“懒癌”，它们不太喜欢到处乱跑，尤其是通过血液系统转移，今天我们就来扒一扒这些“懒癌”的底细，顺便看看它们为什么这么“宅”。
什么是血行转移？
咱们得搞清楚什么是血行转移，血行转移就是癌细胞通过血液循环跑到身体的其他部位，然后在那里安家落户，继续搞破坏，这个过程有点像“癌细胞旅游团”，它们从原发地出发，搭上血液这趟“高铁”，然后随便找个地方下车，开始新的“殖民地”。
有些癌症就是不喜欢这种“旅游生活”，它们更愿意待在原地，做个“宅癌”，这些癌症的血行转移率相对较低,今天我们就来认识一下它们。
基底细胞癌：皮肤界的“宅男”
首先登场的是基底细胞癌（Basal Cell Carcinoma, BCC），这是皮肤癌中最常见的一种，基底细胞癌的“宅”属性非常明显，它几乎从不通过血液转移，虽然它可能会在局部扩散，但跑到远处去搞破坏？不存在的。
为什么基底细胞癌这么“宅”呢？原因有几个：它的生长速度相对较慢，癌细胞没有太多机会进入血液，基底细胞癌的侵袭性较低，它们更喜欢在皮肤表面“躺平”，而不是深入组织，基底细胞癌的细胞特性决定了它们不太适合长途跋涉，毕竟“宅男”嘛,出门多累啊。
甲状腺乳头状癌：甲状腺界的“佛系青年”
接下来是甲状腺乳头状癌（Papillary Thyroid Carcinoma, PTC），这是甲状腺癌中最常见的一种，甲状腺乳头状癌的“佛系”属性也很强，虽然它可能会通过淋巴系统转移,但血行转移却非常少见。
为什么甲状腺乳头状癌这么“佛系”呢？它的生长速度较慢，癌细胞进入血液的机会较少，甲状腺乳头状癌的细胞分化较好，这意味着它们的行为相对“规矩”，不太喜欢到处乱跑，甲状腺乳头状癌的治疗效果通常较好，手术切除后复发率较低，这也让它们没有太多机会去“旅游”。
前列腺癌：男性健康的“慢性子”
前列腺癌（Prostate Cancer）是男性常见的癌症之一，尤其是老年男性，前列腺癌的“慢性子”属性非常明显，它的生长速度通常较慢,血行转移的发生率也相对较低。
为什么前列腺癌这么“慢性子”呢？前列腺癌的生长速度较慢，癌细胞进入血液的机会较少，前列腺癌的细胞分化较好，它们的行为相对“规矩”，不太喜欢到处乱跑，前列腺癌的治疗效果通常较好，尤其是早期发现的患者，手术或放疗后复发率较低，这也让它们没有太多机会去“旅游”。
乳腺癌（某些类型）：乳腺界的“慢生活”爱好者
乳腺癌（Breast Cancer）是女性常见的癌症之一，但并不是所有类型的乳腺癌都喜欢通过血液转移，某些类型的乳腺癌，比如导管原位癌（Ductal Carcinoma In Situ, DCIS），它们的“慢生活”属性非常明显,血行转移的发生率非常低。
为什么这些乳腺癌这么“慢生活”呢？导管原位癌的癌细胞还没有突破基底膜，这意味着它们还没有进入血液的机会，这些乳腺癌的细胞分化较好，它们的行为相对“规矩”，不太喜欢到处乱跑，这些乳腺癌的治疗效果通常较好，手术切除后复发率较低，这也让它们没有太多机会去“旅游”。
为什么有些癌症“懒”？
通过以上几个例子，我们可以看出,那些血行转移少见的癌症通常有以下几个共同点：
- 生长速度较慢：这些癌症的癌细胞生长速度较慢,进入血液的机会较少。
- 细胞分化较好：这些癌症的细胞分化较好，行为相对“规矩”,不太喜欢到处乱跑。
- 治疗效果较好：这些癌症的治疗效果通常较好，手术或放疗后复发率较低，这也让它们没有太多机会去“旅游”。
这并不意味着这些癌症就完全无害，即使是“懒癌”，如果不及时治疗，也可能会对患者的健康造成严重影响，无论是什么类型的癌症，早期发现、早期治疗都是关键。
好了，今天的“懒癌”科普就到这里，希望大家在笑一笑的同时，也能对癌症有更深入的了解，健康才是最重要的，别让任何“癌”有机会在你身体里“宅”下去！
英文翻译：
Title: "Lazy Cancers" Also Have Lazy Cancers? — Those Cancers with Rare Hematogenous Metastasis
Article Content:
Hello everyone, I'm your medical expert friend. Today, we're going to talk about a somewhat "lazy" topic—those cancers with rare hematogenous metastasis. Yes, you heard it right, some cancers are "lazy cancers"; they don't like to move around much, especially through the bloodstream. Today, we'll dig into the details of these "lazy cancers" and see why they are so "homebound."
What is Hematogenous Metastasis?
First, we need to understand what hematogenous metastasis is. Simply put, hematogenous metastasis is when cancer cells travel through the bloodstream to other parts of the body, settle there, and continue to cause damage. This process is somewhat like a "cancer cell tour group." They start from the primary site, hop on the "high-speed train" of blood, and then get off at any place they fancy to start a new "colony."
However, some cancers just don't like this "tourist lifestyle." They prefer to stay in place and be "homebound cancers." These cancers have a relatively low rate of hematogenous metastasis. Today, we'll get to know them.
Basal Cell Carcinoma: The "Homebody" of the Skin World
First up is Basal Cell Carcinoma (BCC), the most common type of skin cancer. The "homebody" nature of BCC is very evident; it almost never metastasizes through the blood. Although it may spread locally, going to distant places to cause havoc? Not happening.
Why is BCC so "homebound"? There are a few reasons: First, its growth rate is relatively slow, so cancer cells don't have many opportunities to enter the bloodstream. Second, BCC has low invasiveness; it prefers to "lie flat" on the skin surface rather than delve deep into tissues. Finally, the cellular characteristics of BCC make it unsuitable for long journeys. After all, "homebodies" find going out too tiring.
Papillary Thyroid Carcinoma: The "Zen Youth" of the Thyroid World
Next is Papillary Thyroid Carcinoma (PTC), the most common type of thyroid cancer. The "Zen" nature of PTC is also strong; although it may metastasize through the lymphatic system, hematogenous metastasis is very rare.
Why is PTC so "Zen"? First, its growth rate is slow, so cancer cells have fewer opportunities to enter the bloodstream. Second, PTC cells are well-differentiated, meaning their behavior is relatively "disciplined," and they don't like to move around much. Finally, the treatment outcomes for PTC are usually good, with a low recurrence rate after surgical removal, which also means they don't have many opportunities to "travel."
Prostate Cancer: The "Slowpoke" of Men's Health
Prostate Cancer is one of the common cancers in men, especially older men. The "slowpoke" nature of prostate cancer is very evident; its growth rate is usually slow, and the incidence of hematogenous metastasis is relatively low.
Why is prostate cancer such a "slowpoke"? First, its growth rate is slow, so cancer cells have fewer opportunities to enter the bloodstream. Second, prostate cancer cells are well-differentiated, meaning their behavior is relatively "disciplined," and they don't like to move around much. Finally, the treatment outcomes for prostate cancer are usually good, especially for early-detected cases, with a low recurrence rate after surgery or radiation therapy, which also means they don't have many opportunities to "travel."
Breast Cancer (Certain Types): The "Slow Living" Enthusiasts of the Breast World
Breast Cancer is one of the common cancers in women, but not all types of breast cancer like to metastasize through the blood. Certain types, such as Ductal Carcinoma In Situ (DCIS), have a very evident "slow living" nature, with a very low incidence of hematogenous metastasis.
Why are these breast cancers so "slow living"? First, the cancer cells in DCIS have not yet breached the basement membrane, meaning they haven't had the opportunity to enter the bloodstream. Second, these breast cancer cells are well-differentiated, meaning their behavior is relatively "disciplined," and they don't like to move around much. Finally, the treatment outcomes for these breast cancers are usually good, with a low recurrence rate after surgical removal, which also means they don't have many opportunities to "travel."
Conclusion: Why Are Some Cancers "Lazy"?
From the above examples, we can see that cancers with rare hematogenous metastasis usually have the following common traits:
- Slow Growth Rate: These cancers have a slow growth rate, so cancer cells have fewer opportunities to enter the bloodstream.
- Well-Differentiated Cells: These cancers have well-differentiated cells, meaning their behavior is relatively "disciplined," and they don't like to move around much.
- Good Treatment Outcomes: The treatment outcomes for these cancers are usually good, with a low recurrence rate after surgery or radiation therapy, which also means they don't have many opportunities to "travel."
Of course, this doesn't mean these cancers are completely harmless. Even "lazy cancers" can severely impact a patient's health if not treated promptly. Therefore, early detection and early treatment are crucial for any type of cancer.
Alright, that's it for today's "lazy cancer" science lesson. I hope you can laugh a little while also gaining a deeper understanding of cancer. Remember, health is the most important thing; don't let any "cancer" have the chance to "stay home" in your body!
Note: The term "lazy cancer" is used humorously and metaphorically to describe cancers with rare hematogenous metastasis. It is not a medical term and should not be taken literally.
