Megaloblast. Now there’s a word you don’t hear every day.

The root -blast comes from the Greek blastos, meaning “germ” or “bud,” and is familiar from terms like blast cells—very young hematopoietic precursor cells. Megalo- comes from the Greek megas, meaning “large” or “great,” as in splenomegaly. So is a megaloblast simply a large, immature cell?

Not quite.

In this episode, we break down megaloblastic anemia: why it develops, what vitamin B12 and folate have to do with it, what you’ll see on a CBC and peripheral smear, and how to recognize and treat the underlying problem.

After listening to this AudioBrick, you should be able to:

• Explain the pathogenesis of megaloblastic anemia.
• Identify common causes of vitamin B12 and folate deficiency and distinguish their associated nonhematologic findings.
• Recognize the characteristic complete blood count findings seen in megaloblastic anemia.
• Describe and identify the characteristic morphologic changes in the peripheral blood and bone marrow.
• Explain the principles of treatment for megaloblastic anemia.

You can also explore the original Megaloblastic Anemia Brick from our Hematology collection, available free here:

https://usmle-rx.scholarrx.com/rx-bricks/brick/CP_HEM0022

Want to explore more Rx Bricks and USMLE-Rx resources? Start your free USMLE-Rx trial and get five full days of access to Rx360+, including Qmax, Rx Bricks, Flash Facts, and Express Videos.

https://usmle-rx.com/free-trial/

After your trial ends, you can continue accessing over 150 free Rx Bricks, including the complete General Microbiology and Cellular and Molecular Biology collections.

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What is substance use disorder (SUD), how does addiction affect the brain, and what are the most effective approaches to diagnosis and treatment?

In this episode of the Rx Bricks Podcast, we explore the epidemiology, neurobiology, diagnosis, and evidence-based treatment of substance use disorders. Designed for medical students and healthcare learners, this AudioBrick explains how substance use can progress to addiction, the role of the brain’s reward pathways, and how clinicians assess and manage substance use disorders.

Substance use disorders can involve alcohol, nicotine, cannabis, opioids, stimulants, and other substances. Understanding their biological, psychological, and social dimensions is essential for effective patient care and medical education.

In this episode, you’ll learn how to:

• Define substance use disorder and recognize its key clinical features.
• Describe the epidemiology and risk factors associated with substance use disorders.
• Explain how the brain’s reward pathways contribute to addiction and how the brain changes during substance use and recovery.
• Understand the DSM-5 diagnostic criteria and severity classifications for substance use disorders.
• Identify evidence-based screening, assessment, and treatment approaches.

Whether you’re studying psychiatry, preparing for the USMLE Step 1 or Step 2 CK, or reviewing the fundamentals of addiction medicine, this episode provides an accessible overview of substance use disorders and their clinical management.

Read the free Rx Brick: Substance Use Disorders — part of the Rx Bricks Psychiatry collection.

Start your free USMLE-Rx trial: www.usmle-rx.com to explore Rx Bricks, practice questions, flashcards, and additional medical education resources.

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The Rx Bricks Podcast makes complex medical topics easier to understand through focused, clinically relevant audio lessons designed for medical students and future physicians.

Multiple endocrine neoplasia (MEN) refers to a group of rare inherited syndromes that increase the risk of developing tumors in multiple endocrine organs. MEN affects men and women at roughly equal rates and occurs across geographic, racial, and ethnic groups.

These syndromes are caused by genetic mutations inherited in an autosomal dominant pattern, meaning an affected parent has a 50% chance of passing the mutation to each child. Unlike many sporadic cancers, tumors associated with MEN often develop at a younger age and may involve several endocrine organs over a patient’s lifetime.

In this AudioBrick, we review the three major MEN syndromes—MEN1, MEN2A, and MEN2B—including their characteristic tumors, genetic causes, clinical features, and management.

After listening to this AudioBrick, you should be able to:

• Define multiple endocrine neoplasia and identify the three major MEN syndromes.
• Compare the key clinical features of MEN1, MEN2A, and MEN2B.
• Describe the genetic mutations associated with each syndrome.
• Summarize the basic approach to management and surveillance.

You can also explore the original Multiple Endocrine Neoplasia Rx Brick from our Endocrine collection, available free here:

https://usmle-rx.scholarrx.com/rx-bricks/brick/CP_END0028 (opens in new tab)

Want to explore more Rx Bricks and other USMLE-Rx study tools? Start a free USMLE-Rx trial:

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Your trial includes access to Rx360+, including Rx Bricks, Qmax, and other resources designed to help you prepare for the USMLE and COMLEX exams.

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