Originally Posted by marinera
Even your Dorland’s definition validate what is written in that books:”…the abnormal multiplication or increase in the number of normal cells in normal arrangement in a tissue” : what does means abnormal here?
I respectfully request that you reread the definition from Dorland’s Medical Dictionary. It said that hyperplasia is: “…the abnormal OR increase in the number of normal cells in normal arrangement in a tissue.” (My emphasis added). What does the word “or” mean to you; to me it means one or the other.
Originally Posted by marinera
I have read again my last post; it seem clear to me, however: my medical textbooks say hyperplasia is not observed in (human) connective tissue except in case of ablation (mutilation), cancer, and other patologic cases. If you are saying these books are wrong, it’s your burden to report some reference about hyperplasia in safe human’ connective tissues.
Let me let you read some exerpts from medical textbooks that disagrees with your statement.
The area of medicine with the greatest experience with connective tissue is Orthopedic Surgery. Here is a reference from “Current Diagnosis & Treatment in Orthopedics”, 4th Edition, Harry B. Skinner. Chapter 1. Basic Science in Orthopedic Surgery, Ranjan Gupta, MD, Vincent J. Caiozzo, PhD, & Harry B. Skinner, MD, PhD. This concerns ligament repair:
“Biologic Tissues in Orthopedics
Healing Mechanisms
During tendon and ligament healing and repair, fibroblastic infiltration from the adjacent tissues is essential. The healing events are initiated by an inflammatory response, which is characterized by polymorphonuclear cell infiltration [white blood cells], capillary budding, and fluid exudation [oozing] and continues during the first 3 days following the injury. After 4 days, fibroplasia occurs and is accompanied by the significant accumulation of fibroblasts. Within 3 weeks, a mass of granulation tissue [healing tissue] surrounds the damaged tissue. During the next week, collagen fibers become longitudinally oriented. During the next 3 months, the individual collagen fibers form bundles identical to the original bundles.”
And there’s this from “Current Surgical Diagnosis and Treatment”, 12th Edition, Gerard M. Doherty and Lawrence W. Way. In Chapter 6. Wound Healing, Thomas K. Hunt, MD:
“Fibroplasia & Matrix Deposition
Fibroplasia
During the course of healing, fibroplasia (replication of fibroblasts) is stimulated by multiple mechanisms…
Dividing fibroblasts are seen mainly near the wound edge, where they are exposed to the growth environment…
The fibroblasts secrete the collagen and proteoglycans of the connective tissue matrix that weld wound edges together.”
Fibroplasia is hyperplasia (increased cell division) of fibroblasts, the cells responsible for the production of the proteins (for example, collagen) that make up connective tissues of which the suspensory ligaments and the tunica are composed (though of relative different composition from one another).
Originally Posted by marinera
I want to add a Wikipedia extract:
I know it is difficult to obtain medical references if you either are not associated with a medical library or don’t have access to their online electronic resources. I do. I tend not to get mine from Wikipedia. Even though it may sound like it, I am not trying to be arrogant or elitist by saying this, but I have better sources and I don’t trust an online encyclopedia that can be altered by anyone.
Originally Posted by marinera
<<In addition, animal tests have shown that stretching a muscle can trigger hyperplasia though this phenomenon has yet to be confirmed in humans.[2]>>
This represents hyperplasia in muscle which is not related to connective tissue for this discussion
Originally Posted by marinera
Some of the more commonly-known clinical forms of hyperplasia, or conditions leading to hyperplasia, are:
I will agree that all of your examples are evidence of abnormal hyperplasia. But as I said above, you have excluded normal hyperplasia, which by the way does exist.
Originally Posted by marinera
So said, hyperplasia is not the “default” way to restore or enhance human’ connective tissue’s functonality/volume, and likelyhood is not the mechanism on while PE-gains are produced.Hope it’s clear.
It is clear that I disagree with your contentions regarding hyperplasia (in this case fibroplasia) as a mechanism of repair of connective tissue. I present evidence from respected medical sources regarding repair and healing in connective tissues that does involve hyperplasia so that the cells (fibroblasts) can repair or increase connective tissue volume (due to injury or overloading, such as hanging) by increased production of the connective tissue subunit proteins. I hope that this makes my understandings clear. If you have any other medical sources to dispute this. again, I’m listening.