In BFS, the fasciculations only occur when the muscles are at rest. In ALS, they are consistent. Even when you walk, you will have the fasciculations. And ALS is characterized by severe muscle weakness. A fasciculation is a small twitch in your muscles, like your muscle going up and down in like a heart beat.
In ALS you would have weakness or atrophy/weakness.In BFS you would not.Fascis in both can look,feel and last exactly the same.FASCICS MEAN NOTHING if you have no severe,and i mean no other severe symptoms.So to answer your question you cannot tell by looking at them.
benign
Benign Neoplasms
The most common cause for tongue fasciculations is BFS, or Benign Fasciculation Syndrome. As the name would suggest, this little understood condition is harmless and generally comes and goes, though some people suffer from it for years. However, any type of persistent fasciculation should be addressed with your physician so that other causes, both treatable and untreatable, might be ruled out. Never attempt any sort of self-diagnosis based on information found on the internet, particularly where fasciculations are concerned. It should also be noted that when checking the tongue for fasciculations, the tongue should be left at rest entirely inside the mouth. Nearly all tongues will fasciculate once you stick them out, and, in fact, it is often difficult for patients to hold their tongues still even at rest on the floor of their mouths. I would suggest that many laypeople are too quick to self-diagnose fasciculations of the tongue.
Benign means that it isn't cancer. It can still be dangerous if it is pressing on something or gets too big.
Benign prostatic Hyperplasia ( BPH) Benign prostatic Hyperplasia ( BPH)
Benign fascilation syndrome causes twitching but no actual nerve damage as MS does or other neurological diseases. BFS is usually diagnosed after other conditions such as MS are ruled out by tests and physical exams/symptoms since there is not a single test to diagnose this condition. however, it is hard to diagnose because they're very similar they have to test the nerves
Tietze Syndrome is a benign inflammation of one or more of the coastal cartilages.
Abnormally functioning salivary glands fail to exhibit a normal uptake and secretion pattern. This test does not differentiate between benign and malignant lesions.
Pleural biopsy is done to differentiate between benign and malignant disease, to diagnose viral, fungal, or parasitic diseases, and to identify a condition called collagen vascular disease of the pleura.
To identify the symptoms of a poisonous bug or insect bite from one that is innocuous, try to use an online resource such as WebMD.com to easily differentiate between harmful and benign bites.
benign means cancerous in most cases...ex. doctors will tell if a tumor is benign or not...if it is benign...it contains no cancer cells.....if it is not...then you get the idea..... Benign means non cancerous.
The difference between the two is that granulation tissue is tissue that forms in the process of wound healing while residual tumor is either a benign or malignant growth that is still present after some type of tumor removal surgery. It is sometimes difficult to differentiate between the two and MRIs are often used for this problem.
these are misnomers actually,when there is no evident cause of hypertension then it is called idiopathic/benign/primary/unspecified hypertension. http://treathypertension.blogspot.com/
Monomelic amyotrophy may also be known as benign focal amyotrophy, single limb atrophy, Hirayama syndrome or Sobue disease
benign
"we were so happy to find out that John's tumour was benign"Luckily, the tumor was benign.
'[Noel] Fielding has the benign liver condition Gilbert's Syndrome, and has commented that if he drinks too much alcohol, it gives him slight jaundice.'