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PODCAST · education

The Grenz Zone

by Logan Kolb, DO; Karthik Krishnamurthy, DO

Logan Kolb, DO, a practicing dermatologist, breaks down common skin rashes and lesions in a simple, fun, and engaging fashion to build a strong foundation of dermatology knowledge for dermatology providers.

Publisher-supplied feed metadata · PodParley refreshed Mar 31, 2026 · Source feed

Episodes

  1. Ep45 – MISC – Hypopigmented Lesions

    Episode 45 covers the high yield facts about hypopigmented lesions! Check out our first YouTube video! https://www.youtube.com/watch?v=14A5gQNZFGM Donate to The Grenz Zone: https://grenzzonederm.com/donate/ Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent episode...

  2. Ep44 – DERMAL – Histiocytic – Sarcoidosis

    Episode 44 continues the dermal reaction pattern with a look at sarcoidosis. Check out our first YouTube video! https://www.youtube.com/watch?v=14A5gQNZFGM Donate to The Grenz Zone: https://grenzzonederm.com/donate/ Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent...

  3. Ep43 – DERMAL – Histiocytic – Granuloma Annulare

    Episode 43 continues the dermal reaction pattern with a deep dive on granuloma annulare. Check out our first YouTube video! https://www.youtube.com/watch?v=14A5gQNZFGM Donate to The Grenz Zone: https://grenzzonederm.com/donate/ Connect with us: Facebook │ Instagram www.grenzzonederm.com –…

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  4. Ep42 – DERMAL – Depositional disorders

    Episode 42 kicks off the dermal reaction pattern with concise details of the numerous dermal depositional disorders. Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent episode study guides! Feel free to contact us with any feedback through our website or at...

  5. Ep41 – MISC – Biologics with Dr. K Part III – Rx sent, now what? – prior auth, staffing

    Time to bring it home! In the third and final episode of this three part interview series with Dr. Krishnamurthy, we will learn about handling prior authorizations, staffing, and other tips and tricks for best serving our patients on biologics. Connect with us: Facebook │ Instagram...

  6. Ep40 – MISC – Biologics with Dr. K Part II – Choosing your biologic

    Let’s continue learning about biologics! In the second episode of this three part interview series with Dr. Krishnamurthy, we continue to learn about the indications for biologic use and other relevant considerations when prescribing biologics. This is some complicated stuff, and we are grateful…

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  7. Ep39 – MISC – Biologics with Dr. K Part I – Obj/Subj criteria, Patient buy-in

    Get excited for some highly requested episodes! In this first episode of a three part interview series with Dr. Krishnamurthy, we will start to break down biologics: what are they, how do they work, and what makes a patient with psoriasis a good candidate for therapy with a biologic? Connect with...

  8. Ep38 – MISC – Bumps in a Baby

    Bumps in a baby?! Say it ain’t so! In this episode, we discuss the differential diagnosis for bumps in infants and young children ranging from benign lesions, such as milia, to more serious lesions, such as pediatric melanomas. References: Bouraoui S, Mlika M, Kort R, Cherif F, Lahmar A, Sabeh M....

  9. Ep37 – MISC – Hyperhidrosis

    In this episode, we touch on another common presentation to dermatology offices – hyperhidrosis. Sweaty palms, sweaty pits, sweaty anything can be very frustrating for patients and very rewarding to get adequate treatment. We’ll discuss pearls in the diagnosis, differential, and treatment…

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  10. Ep36 – MISC – HS Part III – Management pearls with Dr. Joslyn Kirby, MD

    In the third episode of season 3, we finish our three episode series on hidradenitis suppurativa with a discussion of HS management pearls with Dr. Joslyn Kirby, the vice chair of education and program director for the Department of Dermatology at Penn State. She offers her invaluable insight as…

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  11. Ep35 – MISC – HS Part II – Pathogenesis, Comorbidities, & Treatment

    In the second episode of season 3, we continue our three episode series on hidradenitis suppurativa with a discussion of the pathogenesis, comorbidities, and treatment of HS. We break down the complex treatment of HS into five categories including trigger avoidance, topical therapies, systemic…

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  12. Ep34 – MISC – Hidradenitis Suppurativa (HS) I – The Patient Experience With Dr. Katelyn Baker

    In the first episode of season 3, we begin our three episode series on hidradenitis suppurativa with a discussion of the HS patient experience with Dr. Katelyn Baker, a doctor of clinical psychology who graciously shares with us her own personal experiences as a patient with HS. She also offers...

  13. The Grenz Zone Trailer

    Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent episode study guides! Feel free to contact us with any feedback through our website or at [email protected] If you enjoy the podcast, please help us out by sharing the episodes with a friend and by leaving a...

  14. Ep33 VASC – Vascular growths

    We round out season 2 and the vascular reaction pattern by discussing vascular tumors and malformations. With the help of Dr. Binky, we will cover congenital and infantile hemangiomas, PHACES syndrome, port wine stains, Sturge-Weber syndrome, pyogenic granulomas, angiokeratomas, tufted angiomas,...

  15. Ep32 VASC – Purpuric Rash case

    After some dense content in the past 4 episodes on vasculitis, vasculopathy, and retiform purpura, we bring it all together at the patient’s bedside with Dr. Jerry Titus-Vasculitis and walk through how to get a thorough H&P for a patient with a purpuric rash, along with discuss the basics of…

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  16. Ep31 VASC – Retiform purpura

    Like erythroderma, retiform (branching/angulated) purpura is not the diagnosis – it’s a clinical sign hinting towards a variety of underlying conditions, which can be emergent and deadly. Dr. DOOD gives us clinical pearls on the differential diagnosis and approach to patients with retiform…

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  17. Ep30 VASC – Vasculopathy

    Dr. Grumpypants replaces his former rival Jerry Titus-Vasculitis for a discussion on the many causes of vasculopathy, including the inherited and acquired disorders of the coagulation pathway and platelets. We also discuss embolic disorders, pigmented purpuras, and hypergammaglobulinemic purpura…

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  18. Ep29 VASC – Vasculitis II

    Like all of dermatology, vasculitis and purpuric rashes are a complicated topic that can be difficult to know where to start with. We simplify both vasculitis and vasculopathies in a 5-episode series, this time with the corny gameshow “Name That Vasculitis”, hosted by the even cornier Dr. Jerry...

  19. Ep28 VASC – Vasculitis I

    Like all of dermatology, vasculitis and purpuric rashes are a complicated topic that can be difficult to know where to start with. We simplify both vasculitis and vasculopathies in a 5-episode series, this time with the corny gameshow “Name That Vasculitis”, hosted by the even cornier Dr. Jerry...

  20. Ep27 VASC – Urticaria

    Around 10-20% of the population, including Dr. Grumpypants, will develop hives (urticaria) in their lifetime, and it can be more complicated than you think. We discuss its pathogenesis, differential diagnosis, workup, and management. Connect with us: Facebook │ Instagram www.grenzzonederm.com –...

  21. Ep26 VASC – Figurate (Gyrate) Erythemas (EAC, EGR, Erythema migrans, Erythema marginatum)

    Dr. Grumpypants joins us to discuss this group of disorders that have a very distinct appearance but very different causes and prognoses. We will cover erythema annulare centrifigum (EAC), erythema gyratum repens (EGR), erythema migrans (a/w Lyme disease), and erythema marginatum (a/w rheumatic...

  22. Ep25 – COVID-19 and Dermatology – with Dr. Karthik Krishnamurthy, DO and Dr. Grumpypants

    In response to the COVID-19 pandemic, we will veer from our traditional content in order to give dermatology providers information and guidance. This episode will include a basic discussion of what we know about COVID-19, along with an interview with Dr. Krishnamurthy on how dermatology practices...

  23. Ep24 VASC – Toxin-mediated rashes (SSSS, TSS, Kawasaki DZ, Scarlet Fever)

    When you get a consult for concern of Stevens Johnson syndrome or TEN, you cannot get tunnel vision and have to keep a broad differential, which should include many of the toxin-mediated disorders we’ll discuss in today’s episode, including Staphylococcal scalded skin syndrome, toxic shock...

  24. Ep23 VASC – Viral Exanthems

    With the help of Dr. Binky, we’ll go beyond simply labeling a rash as a viral exanthem and discuss the common causes and the less commonly seen viral exanthems like measles that can’t be missed, and are highly testable. Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes...

  25. Ep22 VASC – SJS/TEN

    We continue our vascular reaction pattern with Dr. DOOD by discussing one of the most important dermatology emergencies, Stevens Johnson syndrome (SJS) and toxic epidermal necrolysis. Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent episode study guides! Feel free…

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  26. Ep21 VASC (Vascular) – Erythema multiforme

    We kick off our 3rd reaction pattern, the vascular disorders, by discussing EM with the help of another new attending, Dr. DOOD. As always, we’ll share pearls in the H&P, workup, and management of EM patients Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent episode...

  27. Ep20 MISC – Diaper Dermatitis

    The Grenz Zone podcast welcomes our pediatric dermatologist Dr. Binky to discuss diaper dermatitis, which affects 25-50% of infants. She shares pearls for developing your differential diagnosis and how to approach your H&P and treatment strategies. Connect with us: Facebook │ Instagram...

  28. Ep19 MISC – Acne 2

    Acne is more complicated than you think. Dr. Grumpypants sticks around to share some more pearls in this 2-part series on acne. This episode will discuss systemic treatments for acne including antibiotics, oral contraceptive pills, spironolactone, and isotretinoin. We then discuss pearls for your...

  29. Ep18 MISC – Acne 1

    Acne is more complicated than you think. Dr. Grumpypants makes his return in this 2-part series on acne. This episode will cover the pathogenesis, aggravating factors (e.g. hormonal flares, cosmetic products, medications, diet), pediatric acne basics, and topical acne treatments. Connect with us:...

  30. Ep17 MISC – AK/SCC

    Dr. Chop joins us once again to teach us some pearls on pre-malignant actinic keratoses and the 2nd most common skin cancer, cutaneous squamous cell carcinoma (SCC) Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent episode study guides! Feel free to contact us with...

  31. Ep16 MISC (Miscellaneous) – Basal Cell Carcinoma

    We start season 2 by taking a quick detour from the reaction patterns to cover some important dermatology topics, starting with basal cell carcinoma (BCC). We also welcome our first new attending of the season with Dr. Chop to teach us some pearls on BCC, which is the most common type of skin...

  32. Ep15 ECZ – Atopic Dermatitis

    Atopic dermatitis is the most common chronic dermatoses treated by healthcare providers. We will discuss pearls in diagnosis (including associated skin findings like keratosis pilaris), trigger avoidance, diagnosis, and treatment. Connect with us: Facebook │ Instagram www.grenzzonederm.com –...

  33. Ep14 ECZ – Stasis Dermatitis/Red Leg Differential

    This is an incredibly important topic for our listeners in primary care – the approach to patients with red lower legs. We will discuss pearls to approaching these patients and include an in-depth discussion on stasis dermatitis, along with a bonus section on another common eczematous disorder:...

  34. Ep13 ECZ (Eczematous) – Contact Dermatitis

    We kick off our 2nd reaction pattern of eczematous disorders by discussing irritant and allergic contact dermatitis. Dr. Grumpypants has some games to help teach us the most common irritants and allergens to know in dermatology. Connect with us: Facebook │ Instagram www.grenzzonederm.com –…

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  35. Ep12 PSQ – Erythroderma

    Erythroderma is not a diagnosis, but rather a clinical presentation that carries a wide differential diagnosis. This podcast discusses some great pearls for remembering a broad differential and using it to guide your H&P, workup, and eventual treatment. Connect with us: Facebook │ Instagram...

  36. Ep11 PSQ – Annular disorders (Tinea, SCLE, EAC)

    This episode includes an in depth discussion on the various tinea infections, followed by pearls in the etiology and diagnosis for two other papulosquamous disorders that are often misdiagnosed: subacute cutaneous lupus erythematosus (SCLE) and erythema annulare centrifigum (EAC). Connect with…

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  37. Ep10 PSQ – Lichen Planus

    Lichen planus is a relatively dermatologic rash that has a long list of variants. This podcast includes a discussion of these variants along with pearls for remembering their histology, diagnosis, and treatment. Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent...

  38. Ep9 PSQ – Pityriasiform (PR, 2° Syph, TV)

    Pityriasis rosea is a common rash that can often be diagnosed without biopsy. However it can be mimicked by secondary syphilis and tinea versicolor. This episode includes a discussion of all 3 disorders and includes a clinical scenario seeing a young patient with a pityriasiform rash along with…

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  39. Ep8 PSQ – Parapsoriasis/PRP

    We round out the psoriasiform papulosquamous disorders with a double-feature on two often under-recognized disorders: parapsoriasis and pityriasis rubra pilaris (PRP). Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent episode study guides! Feel free to contact us…

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  40. Ep7 PSQ – Mycosis Fungoides

    Mycosis fungoides and other cutaneous T cell lymphomas (CTCL) can be a confusing and complicated topic. We will simplify CTCL and discuss the pathogenesis, diagnosis, and treatment of mycosis fungoides. Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent episode study...

  41. Ep6 PSQ – Seborrheic Dermatitis

    We continue our papulosquamous differential by discussing seborrheic dermatitis, another extremely common dermatologic condition affecting people of all ages from infants to the elderly. Dr. Grumpypants will be joining us again to give us some pearls on diagnosis and treatment. Connect with us:...

  42. Ep5 PSQ – Psoriasis II

    Now that you’ve got the history and physical for a psoriasis patient down, how do we get them better? To understand treatment, we will start by breaking the immunology down to the basics, in an easy-to-understand fashion. We will then go treatments for psoriasis including topicals, UV light, oral...

  43. Ep4 PSQ (Papulosquamous) – Psoriasis I

    We will kick off our papulosquamous reaction pattern by discussing a bread and butter topic in dermatology: psoriasis. This podcast discusses pearls for getting a thorough history, review of systems, and physical exam for your patients with psoriasis. Connect with us: Facebook │ Instagram...

  44. Ep3 – Introduction to Reaction patterns – with Dr. Charles Gropper, MD

    This episode will lay the groundwork for the first several seasons. We will start with a brief introduction to the 5 morphologic reaction patterns from the paper “An approach to clinical dermatologic diagnosis based on morphologic reaction patterns” (reference below). We will then end with an...

  45. Ep2 – The Dermatology Exam

    A great dermatology provider knows how to get a thorough history and physical exam. We will discuss some pearls on getting this thorough history and discuss how to do a full body skin exam. Connect with us: Facebook │ Instagram www.grenzzonederm.com – includes excellent episode study guides! Feel...

  46. Ep1 – Intro/Basic Anatomy of Skin, Hair, and Nails

    In order to provide dermatologic care, we must understand the anatomy of the skin, hair, and nails. This episode will start with a brief introduction describing the content of the podcast - who it’s intended for, how it is organized, etc. We will then go over the basic anatomy of the skin, hair,...

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ABOUT THIS SHOW

Logan Kolb, DO, a practicing dermatologist, breaks down common skin rashes and lesions in a simple, fun, and engaging fashion to build a strong foundation of dermatology knowledge for dermatology providers.

HOSTED BY

Logan Kolb, DO; Karthik Krishnamurthy, DO

Produced by The Grenz Zone

CATEGORIES

Frequently Asked Questions

How many episodes does The Grenz Zone have?

The Grenz Zone currently has 46 episodes available on PodParley. New episodes are automatically indexed when they're published to the podcast feed.

What is The Grenz Zone about?

Logan Kolb, DO, a practicing dermatologist, breaks down common skin rashes and lesions in a simple, fun, and engaging fashion to build a strong foundation of dermatology knowledge for dermatology providers.

How often does The Grenz Zone release new episodes?

The Grenz Zone has 46 episodes. Check the episode list to see recent publication dates and frequency.

Where can I listen to The Grenz Zone?

You can listen to The Grenz Zone on PodParley by clicking any episode. We provide an embedded audio player for direct listening, and you can also subscribe via your preferred podcast app using the RSS feed.

Who hosts The Grenz Zone?

The Grenz Zone is created and hosted by Logan Kolb, DO; Karthik Krishnamurthy, DO.
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