Misha Rosenbach, MD
@misharosenbach.bsky.social
Dermatologist (medical derm, granulomas [sarcoid & more], neutrophilic dzs [PG/Sweets/etc], inpatient derm, drug reactions [SJS/DRESS], MedEd, climate & sustainability) @pennmedicine.bsky.social Residency PD @PennDerm. Views mine, not medical advice
Reposted by Misha Rosenbach, MD
A 5yo boy was admitted to the hospital because of fever and rash. Nonblanching papules spread from the feet to the legs, buttocks, lower back, arms, and ears. A diagnostic test was performed. What is the most likely diagnosis in this case? Cast your vote before Dec. 11: nej.md/3M2gY1C
November 27, 2025 at 5:15 PM
A 5yo boy was admitted to the hospital because of fever and rash. Nonblanching papules spread from the feet to the legs, buttocks, lower back, arms, and ears. A diagnostic test was performed. What is the most likely diagnosis in this case? Cast your vote before Dec. 11: nej.md/3M2gY1C
Reposted by Misha Rosenbach, MD
This case report describes a woman in her 30s with porcelain-white discoloration of all nails, which persisted under pressure, and a GJA1 mutation.
ja.ma/4prvTRa
ja.ma/4prvTRa
November 29, 2025 at 3:00 PM
This case report describes a woman in her 30s with porcelain-white discoloration of all nails, which persisted under pressure, and a GJA1 mutation.
ja.ma/4prvTRa
ja.ma/4prvTRa
Reposted by Misha Rosenbach, MD
The SAFE Sunscreen Standards Act got slipped into the budget bill; is now law. It directs FDA to accept non-animal data, which removes what had been a major hurdle to sunscreen approvals in the US. My story for @medscape.com
#Medsky #Dermsky #tanning #dermatology #sunsafety #skincancer #melanoma
#Medsky #Dermsky #tanning #dermatology #sunsafety #skincancer #melanoma
Just-Signed Law Expected to Speed New Sunscreens to Market
Consumers in the US may finally have access to formulations and ingredients that have long been available in other countries.
www.medscape.com
November 26, 2025 at 2:46 PM
The SAFE Sunscreen Standards Act got slipped into the budget bill; is now law. It directs FDA to accept non-animal data, which removes what had been a major hurdle to sunscreen approvals in the US. My story for @medscape.com
#Medsky #Dermsky #tanning #dermatology #sunsafety #skincancer #melanoma
#Medsky #Dermsky #tanning #dermatology #sunsafety #skincancer #melanoma
Reposted by Misha Rosenbach, MD
A 75-year-old woman with a history of breast cancer treated with mastectomy of both breasts and adjuvant hormonal therapy presented with a 1-year history of a rash on her chest. Read the full case details: nej.md/47YGxI4
#MedSky #Oncology #DermSky
#MedSky #Oncology #DermSky
November 24, 2025 at 5:04 PM
A 75-year-old woman with a history of breast cancer treated with mastectomy of both breasts and adjuvant hormonal therapy presented with a 1-year history of a rash on her chest. Read the full case details: nej.md/47YGxI4
#MedSky #Oncology #DermSky
#MedSky #Oncology #DermSky
Reposted by Misha Rosenbach, MD
Editorial: #Nicotinamide shows significant promise as a chemopreventive agent to reduce skin cancer risk in those with a history of the disease, advocating for its integration into routine secondary prevention alongside sun protection.
ja.ma/4rqHguA
ja.ma/4rqHguA
November 25, 2025 at 7:38 PM
Editorial: #Nicotinamide shows significant promise as a chemopreventive agent to reduce skin cancer risk in those with a history of the disease, advocating for its integration into routine secondary prevention alongside sun protection.
ja.ma/4rqHguA
ja.ma/4rqHguA
Reposted by Misha Rosenbach, MD
#Sunburn history, especially painful, blistering, or severe sunburns during childhood or across a lifetime, is associated with increased odds of developing cutaneous squamous cell #carcinoma. ja.ma/44poUQB
November 26, 2025 at 1:00 PM
#Sunburn history, especially painful, blistering, or severe sunburns during childhood or across a lifetime, is associated with increased odds of developing cutaneous squamous cell #carcinoma. ja.ma/44poUQB
Reposted by Misha Rosenbach, MD
JAK2 fusions in cutaneous T-cell lymphomas are present in both aggressive and indolent disease, including patients with early-stage mycosis fungoides and CD30-positive lymphoproliferative disorders.
ja.ma/4pRtfof
ja.ma/4pRtfof
November 26, 2025 at 4:30 PM
JAK2 fusions in cutaneous T-cell lymphomas are present in both aggressive and indolent disease, including patients with early-stage mycosis fungoides and CD30-positive lymphoproliferative disorders.
ja.ma/4pRtfof
ja.ma/4pRtfof
Reposted by Misha Rosenbach, MD
The use of #nicotinamide is associated with a reduced risk of developing skin #cancer, particularly when initiated after the first skin cancer. ja.ma/48cXn5V
November 24, 2025 at 1:00 PM
The use of #nicotinamide is associated with a reduced risk of developing skin #cancer, particularly when initiated after the first skin cancer. ja.ma/48cXn5V
Reposted by Misha Rosenbach, MD
In this cohort study of Merkel cell #carcinoma patients, a falling or negative titer indicated a 99.3% chance of remaining recurrence-free over 3 months, while a rising oncoprotein antibody titer suggested a 58% risk of recurrence by 12 months. ja.ma/4rifJeA
November 24, 2025 at 3:00 PM
In this cohort study of Merkel cell #carcinoma patients, a falling or negative titer indicated a 99.3% chance of remaining recurrence-free over 3 months, while a rising oncoprotein antibody titer suggested a 58% risk of recurrence by 12 months. ja.ma/4rifJeA
Reposted by Misha Rosenbach, MD
One day we’ll look back on this as one of the stupidest things we’ve done.
California farms applied millions of pounds of PFAS to key crops, study finds
‘Forever chemicals’ sprayed on almonds, grapes, tomatoes and other crops as activists warn of ‘obvious problem’
www.theguardian.com
November 18, 2025 at 12:06 PM
One day we’ll look back on this as one of the stupidest things we’ve done.
Reposted by Misha Rosenbach, MD
Absolutely! Let's keep building! @esdrorg.bsky.social ❤️❤️
Now that @jamadermatology.com is here, joining @thejidjournal.bsky.social &otters,
maybe #DermSky can start to grow #derm #dermatology #MedSky
bsky.app/profile/did:...
maybe #DermSky can start to grow #derm #dermatology #MedSky
bsky.app/profile/did:...
November 23, 2025 at 4:17 PM
Absolutely! Let's keep building! @esdrorg.bsky.social ❤️❤️
Now that @jamadermatology.com is here, joining @thejidjournal.bsky.social &otters,
maybe #DermSky can start to grow #derm #dermatology #MedSky
bsky.app/profile/did:...
maybe #DermSky can start to grow #derm #dermatology #MedSky
bsky.app/profile/did:...
November 23, 2025 at 12:37 PM
Now that @jamadermatology.com is here, joining @thejidjournal.bsky.social &otters,
maybe #DermSky can start to grow #derm #dermatology #MedSky
bsky.app/profile/did:...
maybe #DermSky can start to grow #derm #dermatology #MedSky
bsky.app/profile/did:...
Reposted by Misha Rosenbach, MD
💬 Viewpoint: #AI is rapidly transforming dermatology training, yet most residency programs lack dedicated curricula and policies for guiding responsible use and integration into practice.
ja.ma/47UyEEN
ja.ma/47UyEEN
November 22, 2025 at 12:00 PM
💬 Viewpoint: #AI is rapidly transforming dermatology training, yet most residency programs lack dedicated curricula and policies for guiding responsible use and integration into practice.
ja.ma/47UyEEN
ja.ma/47UyEEN
Reposted by Misha Rosenbach, MD
This case report describes a patient with a history of refractory acute myeloid leukemia who presented with white, spiny hyperkeratotic papules on his face and neck, and was subsequently diagnosed with trichodysplasia spinulosa. ja.ma/4pkNRVs
November 20, 2025 at 2:00 PM
This case report describes a patient with a history of refractory acute myeloid leukemia who presented with white, spiny hyperkeratotic papules on his face and neck, and was subsequently diagnosed with trichodysplasia spinulosa. ja.ma/4pkNRVs
Reposted by Misha Rosenbach, MD
Substituting roflumilast for apremilast in #psoriatic disease from 2014-2024 may have saved the US health system up to $13.5 billion.
ja.ma/3JYYZbG
ja.ma/3JYYZbG
November 20, 2025 at 12:00 PM
Substituting roflumilast for apremilast in #psoriatic disease from 2014-2024 may have saved the US health system up to $13.5 billion.
ja.ma/3JYYZbG
ja.ma/3JYYZbG
Reposted by Misha Rosenbach, MD
No statistically significant association was found between the initiation of interleukin (IL)-17(R)A inhibitors and major adverse cardiovascular events in patients, with tumor necrosis factor-α inhibitors used as comparators. ja.ma/47SreSn
November 21, 2025 at 2:00 PM
No statistically significant association was found between the initiation of interleukin (IL)-17(R)A inhibitors and major adverse cardiovascular events in patients, with tumor necrosis factor-α inhibitors used as comparators. ja.ma/47SreSn
Reposted by Misha Rosenbach, MD
Planning to participate in #HCWvsHunger this year?
Let me know and I can be sure you’re on one of my starter packs!
Let me know and I can be sure you’re on one of my starter packs!
November 21, 2025 at 1:13 AM
Planning to participate in #HCWvsHunger this year?
Let me know and I can be sure you’re on one of my starter packs!
Let me know and I can be sure you’re on one of my starter packs!
Reposted by Misha Rosenbach, MD
A 75-year-old woman with a history of infiltrating ductal carcinoma of the breast (previously treated with bilateral radical mastectomy and ongoing adjuvant hormonal therapy) presented to the dermatology clinic with a 1-year history of rash on the chest. 1/2
#MedSky #DermSky
#MedSky #DermSky
November 14, 2025 at 8:20 PM
Perfect super classic image
November 20, 2025 at 11:05 AM
Perfect super classic image
Reposted by Misha Rosenbach, MD
A previously healthy 8-year-old boy presented with a 7-day history of an itchy rash on both cheeks and a lacy rash on his chest and arms. Read the full case details in the Images in Clinical Medicine article “Erythema Infectiosum”: nej.md/47XEGDv
#MedSky #PedSky #DermSky
#MedSky #PedSky #DermSky
November 16, 2025 at 5:02 PM
A previously healthy 8-year-old boy presented with a 7-day history of an itchy rash on both cheeks and a lacy rash on his chest and arms. Read the full case details in the Images in Clinical Medicine article “Erythema Infectiosum”: nej.md/47XEGDv
#MedSky #PedSky #DermSky
#MedSky #PedSky #DermSky
Reposted by Misha Rosenbach, MD
A woman in her 70s with rheumatoid arthritis who was receiving long-term immunosuppression (prednisolone and methotrexate) presented with a 6-month history of progressive papulonodules on her face and extremities.
Take the Clinical Challenge: ja.ma/43ZRvMc
Take the Clinical Challenge: ja.ma/43ZRvMc
November 15, 2025 at 1:00 PM
A woman in her 70s with rheumatoid arthritis who was receiving long-term immunosuppression (prednisolone and methotrexate) presented with a 6-month history of progressive papulonodules on her face and extremities.
Take the Clinical Challenge: ja.ma/43ZRvMc
Take the Clinical Challenge: ja.ma/43ZRvMc
Reposted by Misha Rosenbach, MD
This case report describes a child with lesions that initially appeared as vesicles and progressively spread in a centrifugal pattern, forming concentric, spiraled rings.
ja.ma/48dpF1s
ja.ma/48dpF1s
November 15, 2025 at 2:00 PM
This case report describes a child with lesions that initially appeared as vesicles and progressively spread in a centrifugal pattern, forming concentric, spiraled rings.
ja.ma/48dpF1s
ja.ma/48dpF1s
Reposted by Misha Rosenbach, MD
Glucagon-like peptide-1 receptor agonists (#GLP1 RAs) may improve hidradenitis suppurativa outcomes by inducing weight loss and reducing inflammation.
ja.ma/3Xtu7D0
ja.ma/3Xtu7D0
November 15, 2025 at 3:00 PM
Glucagon-like peptide-1 receptor agonists (#GLP1 RAs) may improve hidradenitis suppurativa outcomes by inducing weight loss and reducing inflammation.
ja.ma/3Xtu7D0
ja.ma/3Xtu7D0
Reposted by Misha Rosenbach, MD
A woman in her 70s presented with a 5-year history of pruritic, thickened plaques involving the trunk and extremities. Despite intermittent treatment with antihistamines and glucocorticoids, the condition progressed.
Read the full case report: ja.ma/47Zm3ig
Read the full case report: ja.ma/47Zm3ig
November 15, 2025 at 5:00 PM
A woman in her 70s presented with a 5-year history of pruritic, thickened plaques involving the trunk and extremities. Despite intermittent treatment with antihistamines and glucocorticoids, the condition progressed.
Read the full case report: ja.ma/47Zm3ig
Read the full case report: ja.ma/47Zm3ig
Reposted by Misha Rosenbach, MD
Case report describes a man in his 70s presented with a history of progressive hyperpigmentation of the flexures of his forearms, axillae, and groin since early adulthood.
ja.ma/4r1WrtU
ja.ma/4r1WrtU
November 16, 2025 at 1:00 PM
Case report describes a man in his 70s presented with a history of progressive hyperpigmentation of the flexures of his forearms, axillae, and groin since early adulthood.
ja.ma/4r1WrtU
ja.ma/4r1WrtU