Tumor & Cancer – What is the Difference?

Tumor & Cancer – What is the Difference?

In this post we will clear our doubts regarding the term tumor and cancer. The general misconception what I have noticed is, when we hear the term tumor we think it is a cancer. But in fact tumor does not necessarily mean cancer.

Tumor aka neoplasm (neo = new and plasma = formation) is an abnormal mass of a tissue due to the abnormal growth. As a result, at that particular site lump appears which is called tumor. It is not necessary that all the tumors are cancerous. Let’s try and understand it.

Tumors are of two types:

1. Benign tumors:

Benign tumors are “non-progressive”. This means benign tumors limit their growth to a particular site wherever they are formed in the body. It is not going to spread form this site to any other site in the body. It cannot metastasize which means it cannot spread anywhere else in the body. Therefore, such benign tumors are noncancerous and they can be removed by surgery.

2. Malignant tumors:

Malignant tumors are cancerous because they have the ability to metastasize. They can spread from its primary site to any other part of the body.

Therefore, when a tumor is detected, it is very important to do biopsy to understand whether it is a benign tumor or malignant tumor.

Cancer is the term used to describe an uncontrolled growth of a cell. It is not necessary that all cancers are characterized by appearance of tumor. For example, blood cancer.

Cancer is a malignant condition. Based on what type of cancer or what stage it is detected, surgery, radiation therapy or chemotherapy is given.

Therefore, the term tumor and cancer cannot be used as synonyms.

I hope this post helped 🙂

To understand more in details, watch a video on this topic here.

ABO and Rh Blood Group System (Blood types, ABO Antigens and Antibodies For Each Type in Serum)

ABO and Rh Blood Group System

Karl Landsteiner observed that the RBCs of some individuals were agglutinated by the serum from other individuals and he noted the patter of agglutination. This marked the discovery of first blood group system.

This reaction between RBC and serum was due to the presence of Ags on RBC and presence of Abs in serum. The antigens on RBCs are termed as antigen A and antigen B and blood group system is based on this.

Blood group A would have Antigen A on RBC

Blood group B would have Antigen B on RBC

Blood group AB would have Antigen A and B both on RBC

Blood group O would have no Antigens on RBC

Rh blood group was named after the Rhesus monkey because it was 1st discovered in them. It is the second important blood group system after the ABO blood group system. Rh antigen plays an important role in hemolytic disease of the new born.

Presence of antigen D on RBC marks it Rh +ve blood and

Absence of antigen D on RBC marks it Rh -ve blood.

Antibodies in Serum:

Blood group A will have anti B Abs.

Blood group B will have anti A Abs.

Blood group AB will have none.

Blood group O will have both anti A and anti B Abs.