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    Contents lists available at ScienceDirect
    Physica A
    journal homepage:
    A physicist’s view of the similarities and differences between tuberculosis and cancer Peter Richmond a, Bertrand M. Roehner b,∗ a School of Physics, Trinity College Dublin, Ireland b Institute for Theoretical and High Energy Physics (LPTHE), University Pierre and Marie Curie, Paris, France
    • Responses of organs to TB and cancer are similar.
    • In TB people died before childbearing age, in cancer after.
    • It is harder to fight domestic intruders than external ones.
    Article history:
    Received in revised form 1 January 2019 Available online xxxx
    Death ratio
    In 2015 in the United States 612,000 persons died from cancer whereas only 470 died from tuberculosis (TB), a disease which was the main cause of death around 1900. How can one explain such a huge discrepancy in treatment progress? A statistical and medical comparison between TB and cancer will give some clues. What makes the question of particular interest is the fact that TB and cancer also share important features. Both TB and cancer can affect several organs, e.g. the lungs, brain, bones, intestines, skin. What in cancer is called ‘‘malignant neoplasm’’ (tumor) is called ‘‘granuloma’’ in TB. By isolating malignant cells from the rest of the body, such clusters protect the host’s organism but at the same time they are ‘‘secure beachheads’’ from where malignant cells can wander off to new locations. Thus, metastatic tumors have a TB parallel in the form of secondary granulomas.
    To investigate this parallel more closely we use the age-specific response of organs. Called Epoprostenol spectrometric analysis in a previous paper (Berrut et al. 2017), this method pro-vides information about how fast tumors develop and how serious they become. A char-acterization of the response to TB of organ j is given by the following (age-dependent) death ratio:
    The development of cancer tumors can be described by similar profile functions Cj(t). It appears that for the same organ Tj(t) is similar in shape to Cj(t). In other words,
    the idiosyncrasies of each organ are more determinant than the functional differences between TB and cancer. Such observations bring to light vulnerabilities in the way the immune system provides protection to various organs.
    ∗ Corresponding author. E-mail addresses: [email protected] (P. Richmond), [email protected] (B.M. Roehner).
    1. Introduction
    The paper has the following starting point and motivation.
    1.1. How to measure the role of the immune system in cancer?
    People who, due to organ transplantation, undergo long-term imunosuppression provide an insight into the role of the immune system in the development of cancer. Several studies have shown a 3-fold increased risk of cancer1 compared with the general population of same age and sex [1,2].