The Grenz Zone

By Logan Kolb, DO; Karthik Krishnamurthy, DO

What's 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.

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The Grenz Zone episodes:

03.25.2024
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 – includes excellent episode study guides! Feel free to contact...
12.19.2023
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...
10.27.2021
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...
10.13.2021
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,...
09.28.2021
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...
09.01.2021
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...
08.18.2021
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,...
07.28.2021
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...
07.14.2021
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...
07.01.2021
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...
01.11.2021
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...
12.29.2020
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...
11.24.2020
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...
10.26.2020
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...
09.22.2020
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 of...
07.28.2020
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...
06.23.2020
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...
05.12.2020
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 –...
04.07.2020
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...
03.23.2020
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...
03.10.2020
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...
02.26.2020
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...
02.13.2020
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 to...
01.28.2020
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 │...
01.14.2020
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 ...
01.06.2020
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...
12.18.2019
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...
12.11.2019
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...
12.05.2019
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...
10.10.2019
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 – includes excellent episode...
09.26.2019
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...
09.12.2019
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 │...
08.22.2019
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...
08.16.2019
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...
08.08.2019
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...
08.01.2019
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...
07.25.2019
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 with any feedback...
07.18.2019
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...
07.11.2019
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...
06.27.2019
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...
06.26.2019
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...
06.25.2019
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). ...
06.25.2019
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...
06.25.2019
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,...

What's The Grenz Zone about?

Download our free app to listen on your phone

The Grenz Zone episodes:

Ep43 – DERMAL – Histiocytic – Granuloma Annulare

Ep42 – DERMAL – Depositional disorders

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

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

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

Ep38 – MISC – Bumps in a Baby

Ep37 – MISC – Hyperhidrosis

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

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

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

The Grenz Zone Trailer

Ep33 VASC – Vascular growths

Ep32 VASC – Purpuric Rash case

Ep31 VASC – Retiform purpura

Ep30 VASC – Vasculopathy

Ep29 VASC – Vasculitis II

Ep28 VASC – Vasculitis I

Ep27 VASC – Urticaria

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

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

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

Ep23 VASC – Viral Exanthems

Ep22 VASC – SJS/TEN

Ep21 VASC (Vascular) – Erythema multiforme

Ep20 MISC – Diaper Dermatitis

Ep19 MISC – Acne 2

Ep18 MISC – Acne 1

Ep17 MISC – AK/SCC

Ep16 MISC (Miscellaneous) – Basal Cell Carcinoma

Ep15 ECZ – Atopic Dermatitis

Ep14 ECZ – Stasis Dermatitis/Red Leg Differential

Ep13 ECZ (Eczematous) – Contact Dermatitis

Ep12 PSQ – Erythroderma

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

Ep10 PSQ – Lichen Planus

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

Ep8 PSQ – Parapsoriasis/PRP

Ep7 PSQ – Mycosis Fungoides

Ep6 PSQ – Seborrheic Dermatitis

Ep5 PSQ – Psoriasis II

Ep4 PSQ (Papulosquamous) – Psoriasis I

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

Ep2 – The Dermatology Exam

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

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