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In this video we will talk about multiple myeloma, the signs, the symptoms, pathogenesis, diagnosis and treatment.
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of multiple myeloma.
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Multiple myeloma is a malignant disease of plasma cells in the bone marrow.
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It is the second most common hematological cancer.
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generally affecting older people.
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There is no known genetic component.
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hereditary genetic component or definitive environmental risk factors.
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Let us see what some common signs and symptoms of multiple myeloma are.
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So many patients present with back pain.
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infections of the respiratory tract.
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Anemia, which will result in tiredness and fatigue.
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renal failure, And, proteinuria.
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people Patients with multiple myeloma also suffer from fractures and dehydration.
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And finally investigations including scans will show lytic bone lesions.
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Looking at a vertebral, sorry,
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looking at a vertebrae, and bone marrow we find that bone will suffer from lytic bone lesions.
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The vertebrae is also a site for hematopoiesis, the production of cells, for the blood.
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which arises from hemopoietic stem cells.
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So if we were to zoom into the bow and marrow, Here we have a hemopoietic stem cell within the bone marrow.
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Normally, the hemotopoietic stem cell will eventually make B cells and then plasma cells.
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which will event where the plasma cells will Eventually, reside in the bone marrow.
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Normally the bone marrow contains less than 5 % plasma cells.
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which are the long -lived plasma cells, and these guys, they secrete antibodies, remember? plasma cell secreted antibodies to help fight against infection.
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The antibodies secreted are normal, consisting of light and heavy chains.
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Now, in multiple myeloma, the hemopoietic stem cell shifts production mainly to produce more B cells and then finally plasma cells.
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Thus, in the bow marrow, we end up with more than 10 % plasma cells.
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occupying the bone marrow.
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And now these plasma cells, they secrete abnormal antibodies.
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Thank you.
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75 % of multiple myeloma cases the antibodies are abnormally produced in high amounts.
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And plasma cells also produce just light chains.
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So they all they produce abnormal antibodies and they produce light chains only.
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and these light chains only that are being produced are called the para -proteins.
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The main antibodies produced or that are found associated with multiple myeloma are high amounts of IgG and IgA.
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Let us now look at at the pathogenesis.
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pathophysiology and the interaction that occurs between these abnormally high amounts of plasma cells with other cells in the bone.
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Firstly, we just need to recap some cells found in the bone and bone marrow.
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So the bone contains a number of cells.
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Osteoblasts are cells that build bone.
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Osteoclasts are the cells that break down bone.
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And then we have things called bone marrow stromal cells which regulate are hematopoiesis.
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So looking at this diagrammatically, here we have osteoblast, an osteoblast which will secrete osteoids,
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and which together with minerals, calcium and phosphate, they will form strong bones.
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Osteoclasts, on the other hand, break down bone by secreting hydrochloric acid.
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The breakdown of bone results in the release of calcium and the phosphate.
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and the calcium here will enter the plasma, the blood.
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The interesting thing is that osteoclast activation, so the bone breaking cells,
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The bone breaking cell's activation is regulated by osteoblasts.
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which express rank L.
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When rank L binds to rank on osteoclasts, This will stimulate osteoclastic activity.
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But osteoblasts also secrete another molecule called OPG.
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which inhibit this interaction.
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thus inhibits or decreases osteoclastic activity.
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Now let me introduce the bone marrow cells and the pathophysiology of multiple myeloma.
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The bone marrow stromal cells normally regulate our hematopoiesis, right?
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But in multiple myeloma, these bone marrow stromal cells will interact with these Uh, cancerous cells through receptors and cytokines.
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adhesion of multiple myelomal cells to the bone marrow stromal cells results in cytokine mediated cell growth.
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survival drug resistance, and migration.
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So essentially the bone marrow stromal cells helps the multiple myeloma cells survive and grow.
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So when the multiple myeloma cells survive and grow, they then do other things.
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that help themselves.
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So, The multiple myeloma cells secrete many cytokines and they have some bad consequences for the body.
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So for example, the multiple myeloma cells can secrete interleukin -3, which actually decreases osteoblastic activity.
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by inhibiting osteoblast progenitor cells to become osteoblasts.
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So basically it just decreases the production of osteoblasts Um...
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The multiple myeloma cells also secrete DKK1, which inhibit OPG production by osteoblast,
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thus resulting in an increase in osteoclastic activity.
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Multiple myeloma cells also stimulate osteoclastic activity.
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through MIP1 Alpha.
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and through expression of rank ligand.
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the osteoclast can self -stimulate itself.
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and the multiple myeloma and the bone marrow stromal cells through interleukin 6.
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So this whole basically the whole cycle Yeah.
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This whole picture shows an amplification of multiple myeloma cells, osteoclastic activity, and a decrease in osteoblastic activity.
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So osteoclastic activity is basically promoted and osteoblastic activity is reduced.
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When osteoclastic activity is stimulated, this will result in bone breaking down.
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An increase in osteoclastic activity will lead to fractures and lytic lesions.
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and also will result in more calcium entering the body.
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So in the blood again here, we have hypercalcemia.
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which can cause nerve problems and dehydration.
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In the blood, there is also paraproteinemia.
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with bits of light chains floating around the paraproteinemia has some bad effects.
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And remember, the light proteins, these paraproteins, are being produced by the multiple myelomal cells.
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So these light chains, these paraproteins, are small enough to get filtered through the glomerulus of the kidneys.
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and and it can lead to renal failure in 20 to 30 % of cases.
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The light chains are also urinated out, they're peed out
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which is a clinical feature of multiple myeloma when light chains are urinated It is known as Benz -Jones proteins.
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Multiple myeloma, as I mentioned at the start, also leads to anemia and this is through several mechanisms.
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Three.
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The first is that there is a shift of hematopoietic stem cells from myeloid
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progenitor to lymphoid progenitor to make more plasma cells.
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2. Overproduction of plasma cells clog up the bone marrow, stopping red blood cells being formed and entering the plasma.
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Three, there's also the kidney failure failing kidney which results in decreased erythropoiesis,
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Um, erythropoietin production and so decrease in red blood cell production.
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There are many investigations that can be performed in multiple myeloma.
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to sort of rule out other problems.
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and to confirm that it's multiple myeloma.
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And these investigations include blood and urine tests.
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In the blood test, we can detect anemia as a result of abnormal red blood cell level.
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we can see an increase in paraproteins, paraproteinemia, a decrease in normal antibodies,
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we see hypercalcemia as a result of increased breakdown of bone.
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we see increase in urea and nitrogenous basis as a result of renal failure, as well as an increase in creatinine,
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which is a measure of renal failure.
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uh, renal competency, I guess.
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Urine tests show urinary Benz Jones proteins, which are the light chains that are peed out, remember.
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And then bone investigations include bone aspiration, bone marrow biopsy, which can show more than 10 % plasma proteins in the bone marrow.
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X -rays can show osteoporosis and CT scans can show lesions of of the bone and soft tissue.
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So those are the investigations we can perform in multiple myeloma.
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The actual diagnosis of multiple myeloma is: One,
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the presence of monoclonal plasma cells in the bone marrow 10 % or greater.
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So this is through bone biopsy.
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Two.
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the presence of monoclonal antibodies, or you know, the paraproteins in serum or in urine.
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And three, one or more of the following.
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So I have an acronym HRAAL, or some people use CRAB, same thing.
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So I use HRAAL, H is for hypercalcemia, R is for renal failure, A is for anemia, and L is for lytic bone lesions.
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So that's how you diagnose it.
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And to treat multiple myeloma, chemotherapy and radiotherapy of the vertebrae, vertebral bodies or Uh, whichever,
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uh, wherever the plasma cells are located.
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the neoplastic plasma cells are located.
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So chemotherapy, and radiotherapy.
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And I won't go into more detail than that.
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Hope you enjoyed this video on multiple myeloma.
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Thanks for watching, bye.
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Thank you.
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Contesto e sfondo
Il video affronta un argomento scientifico complesso: il multiple myeloma, una malattia del sangue. La lingua usata è tecnica ma chiara, con spiegazioni passo passo sulle cellule plasmatiche, lesioni ossee e meccanismi fisiopatologici. È un ottimo materiale per esercitarti a capire l'inglese tecnico, migliorando la comprensione di termini specifici e la pronuncia di parole lunghe. Ecco come sfruttarlo al massimo per il tuo apprendimento!
5 frasi chiave per la comunicazione quotidiana (e non solo!)
- "abnormal antibodies": "anticorpi anomali" – utile per parlare di malattie o immunologia.
- "bone marrow": "midollo osseo" – termine base in medicina e biologia.
- "fight against infection": "lottare contro le infezioni" – frase pratica per descrivere il ruolo del sistema immunitario.
- "break down bone": "distruggere l'osso" – utile per spiegazioni scientifiche o anche in contesti di salute.
- "stimulate activity": "stimolare l'attività" – versatile, si usa in molti contesti, da scienza a sport.
Guida passo passo per lo shadowing: sfrutta il video per migliorare la pronuncia inglese
Lo shadowing (o "shadow speak") è una tecnica fantastica per rafforzare pronuncia, intonazione e velocità di comprensione. Ecco come farlo con questo video:
- Ascolta e ripeti frasi corte: Iniziamo con parti semplici, come "Multiple myeloma is a malignant disease". Ripeti immediatamente dopo il speaker, cercando di imitare la sua tonalità e la lunghezza delle pause. Questo aiuta a familiarizzare con la struttura delle frasi tecniche.
- Concentrati sui termini difficili: Parole come "pathophysiology" o "osteoclasts" hanno una pronuncia specifica. Ascolta più volte, nota come si articola ogni sillaba, poi ripeti. Usa lo shadowspeak per "catturare" il suono corretto.
- Aumenta la velocità: Una volta confidente con le frasi corte, prova a seguire il video a velocità normale. Se ti perdi, riavvia e ripeti. L'obiettivo è sincronizzare la tua voce con quella del speaker, come un'ombra (da cui il nome "shadow speech").
- Analizza l'intonazione: Il speaker usa pause e enfasi per spiegare concetti complessi. Nota dove sosta e quale parola mette in risalto (es. "MORE than 10% plasma cells"). Ripeti con la stessa energia per rendere il tuo inglese più naturale.
- Pratichi 5 minuti al giorno: Non serve ore! Con 5 minuti di shadowspeaks al giorno, noterai progressi veloci nella pronuncia e nella capacità di capire l'inglese tecnico. Ricorda: la costanza è la chiave!
Con questo video, non solo impari cose nuove sulla medicina, ma migliori anche il tuo inglese in modo pratico e divertente. Iniziamo subito – la tua pronuncia non vedrà l'ora di migliorare!
La grammatica di questo video
Le strutture che chi parla usa di più, con le parole esatte del video:
| Struttura | Nel video |
|---|---|
| Forma passiva be + participio passato — conta ciò che accade, non chi lo fa | being produced · are found · is regulated |
| Frasi relative who / which + frase — un’informazione in più su una persona o una cosa | Anemia, which will · osteoblast which will · proteins, which are |
Cos'è la tecnica dello Shadowing?
Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.