A. Sarah Erem

Today is the last day of my last CORE AP rotation. No more noise... 🥰🥰🥰 Next year, it will be wherever you want it to be! (paraphrasing the grandpa) #dermpath #dermx #pathx #skinpathology #dermatologia #dermatology #dermatologist #skinpath #histopathology #dermatopathologia #dermatopathology #dermatopathologist @MeredithKHerman #PathArt

We are excited to launch the new @pathologyCast website: 🌐 pathCast.net A modern, Netflix-style platform for pathology education featuring: 🔹 300+ lectures 🔹 Global expert speakers 🔹 100% free Built to make pathology learning easier to explore, and enjoy .

🔬 VZV / herpes zoster: never gets old — like Chanel, it’s timeless! 🎈 Ballooning degeneration of keratinocytes 🧩 Acantholysis with intraepidermal vesicle/ulcer 👥 Multinucleated keratinocytes with nuclear molding 🔵 Steel-gray nuclei / chromatin margination ± Cowdry A inclusions 🧬 Follicular/adnexal involvement can be a helpful clue for VZV Key differentials 🔍 🦠 HSV — histologically very similar; if you were told they can separate them on H&E --> that is fake news! HSV/VZV IHC 🧴 Spongiotic/contact dermatitis — vesicles + eosinophils, but no viral cytopathic effect 🐜 Arthropod bite reaction — wedge-shaped infiltrate, eosinophils, no herpetic nuclear changes 💊 Fixed drug eruption / PLEVA — necrotic keratinocytes and interface change, but no multinucleation/Cowdry inclusions #dermpath #dermatology #dermatologia #dermtwitter #pathology #pathologists #pathTwitter

@smlungpathguy NYC is the best!!! #nycphotography #newyorkcity #bigapple

LoOOOve #dermpath #dermatology #dermatologia #dermtwitter #pathology #pathologists #pathTwitter

Warty Dyskeratoma Rocks: 🕳️ Crater / cup-shaped lesion = Architecture clue → start thinking WD immediately 🔓 Suprabasal acantholysis →Loss of cohesion (Darier-like) 🧬 Corps ronds + grains = Dyskeratosis → confirms pattern 🌿 Villous projections 🧱Sealing feature → helpful, almost specific #dermpath #dermatology #dermatologia #dermtwitter #pathology #pathologists #pathTwitter

@JCandidoXavier MCPyV?

Collision tumor composed of squamous cell carcinoma and Merkel cell carcinoma, showing synaptophysin positivity and a characteristic perinuclear dot-like CK20 staining pattern #path #pathology #dermpath #dermatology

ISDP rocks!

Congrats!!!! 👇😍🥰😇#dermpath #dermatology #dermatologia #dermtwitter #pathology #pathologists #pathTwitter

Happy to present the results of our group on the digital analysis of acral melanocytic lesions during the 29th @IntSocDermpath Joint Meeting in Denver. 😊 #path #pathology #dermpath #medicine #isdp2026denver

As usual, Wen-Yu is crushing it at USCAP. I can’t wait to visit you at your new job—best of luck! #USCAP2026 #pathology #gipath

🛑Dermpath ASDP Walk – USCAP2026 🚶‍♀️🔬👇Dermpath - the path to rule them all #USCAP2026 #pathology #path #dermatology #dermpath @ASDPTweets

I saw wished I was there! That is my fav part of derm meetings! #ISDPDenver2026 #ISDP #dermpath #PathX

Well deserved, Meredith #USCAP2026

I’m excited to share that The Pathologist has included our Warty ART in its artwork series 🧩✨ Please feel free to circulate the link below 🔗👇😊 I’m very grateful to be included. thepathologist.com/issues/2026/ar… #dermpath #dermatology #dermatologia #dermtwitter #pathology #pathologists #pathTwitter @pathologistmag

Let’s start the morning with pressure lesions! This one is rare but worth knowing—it's much more common on the ear. 🛌Chondrodermatitis Nodularis Nasi (CNN): 👃 Painful, tender small nodule on the nasal tip/ala ⚠️ Central ulcer with wedge-shaped dermal ischemic degeneration 🧩 Underlying degenerative cartilage-chondrocyte dropout/fissuring 🔄 Pressure-induced ischemic repair pattern with granulation tissue — histologically identical to Chondrodermatitis nodularis helicis #dermpath #dermatology #dermatologia #dermtwitter #pathology #pathologists #PathTwitter

🔬 Perivascular Myoid Tumors: SMA+, desmin-, caldesmon- 👉 fake smooth muscle tumors! 1.Biphasic pattern + hemangiopericytoma-like vessels➡️Myofibroma (image attached 👇) 2.Concentric perivascular wrapping without zonation Uniform onion-skin architecture ➡️ Myopericytoma 🔬🔬True smooth muscle differentiation: SMA+, desmin+, caldesmon+ Think "Thick"-walled muscular vessels ➡️Angioleiomyoma #dermpath #dermatology #dermatologia #dermtwitter #pathology #pathologists #pathTwitter