Random Dermpath Cases (tick mouthparts, Masson, Pinkus, Fournier gangrene, etc)dermatology pathology

These were random slides I pulled for a Friday morning teaching session with my awesome dermatology and pathology residents and dermpath fellows in January 2022. Hope you enjoy.
List of entities discussed (click link to go to that part of video):
1. Tick bite with retained mouthparts 0:30
2. Masson "tumor" organizing thrombus in cavernous hemangioma / vascular malformation 7:48
3. Solar lentigo (vs junctional nevus) & large cell acanthoma 15:20
bonus finding: keratin-derived amyloid 19:23
bonus finding: sunburn cells!!! 20:22
4. Fournier gangrene 25:15
bonus finding: strands of fibrin mimicking fungal hyphae 27:50
5. Spindle cell hemangioma with phlebolith (arising in a vascular malformation) 30:27
6. Neurofibroma with floret cells 39:15
bonus finding: normal lymphatic channel with valve 42:53
7. Fibroepithelioma of Pinkus 43:40
bonus finding: keratin-derived amyloid 50:50
8. Dermal duct tumor (vs poroma vs hidradenoma/acrospiroma) 53:03
9. Fungal folliculitis/Majocchi granuloma (tinea/dermatophytosis in hair follicle)1:00:40
Rash that gets worse with steroids? Check for fungus! (tinea incognito) 1:09:52
A complete organized library of all my videos, digital slides, pics, & sample pathology reports is available here: kikoxp.com/pos... (dermpath) & kikoxp.com/pos... (bone/soft tissue sarcoma pathology).
Other relevant posts, videos, and resources:
Our skin adnexal tumors made simple paper in @ArchivesPath: www.archivesof... @EHFultonMD @JRKaley
Melanocytes vs Keratinocytes made easy video: kikoxp.com/pos...
Neurofibroma 101 video: kikoxp.com/pos...
MPNST 101 video: kikoxp.com/pos...
Bug bite reaction: kikoxp.com/pos...
Eccrine Syringofibroadenoma
WSI digital slide: kikoxp.com/pos...
Video: kikoxp.com/pos...
Fibroepithelioma of Pinkus (some regard it as basal cell carcinoma, fibroepithelioma type)
Images: kikoxp.com/pos...
Video: kikoxp.com/pos...
Basaloid follicular hamartoma
WSI digital slide (linear multiple basaloid follicular hamartoma): kikoxp.com/pos...
Video (linear multiple basaloid follicular hamartoma): kikoxp.com/pos...
Images (with CK20+ benign "passenger" Merkel cells): kikoxp.com/pos...
Angiosarcoma
Video (101): kikoxp.com/pos...
Video (short): kikoxp.com/pos...
Video (short - angiosarcoma plus rhinophyma): kikoxp.com/pos...
Video (CD34 negative, solid, spindle & epithelioid - AIP France 2021): kikoxp.com/pos...
Video (solid spindle angiosarcoma with Kaposi sarcoma-like areas): kikoxp.com/pos...
WSI digital slide 1: kikoxp.com/pos...
WSI digital slide 2: kikoxp.com/pos...
WSI digital slide 3 (CD34 negative, solid, spindle & epithelioid): kikoxp.com/pos...
Discussion of pros/cons of CD34 vs CD31 vs ERG in vascular tumors: kikoxp.com/pos...
EHE (epithelioid hemangioendothelioma)
Video (101): kikoxp.com/pos...
WSI digital slide kikoxp.com/pos...
Spindle cell hemangioma
WSI digital slide (best ever!): kikoxp.com/pos...
Image (“mini fat cell”-like endothelial vacuoles clue to diagnosis): kikoxp.com/pos...
Video (AIP France 2021 - bonus case): kikoxp.com/pos...
Video (SCH 101 & discussion of Maffucci syndrome): kikoxp.com/pos...
Video (SCH with “mini fat cell”-like vacuoles): kikoxp.com/pos...
Please check out my Soft Tissue Pathology & Dermatopathology survival guide textbooks: bit.ly/2Te2haB ‬
This video is geared towards medical students, pathology or dermatology residents, or practicing pathologists or dermatologists. Of course, this video is for educational purposes only and is not formal medical advice or consultation.
Presented by Jerad M. Gardner, MD. Please subscribe to my channel to be notified of new pathology teaching videos.
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[@JMGardnerMD]

A complete organized library of all my videos, digital slides, pics, & sample pathology reports is available here: kikoxp.com/posts/5084 (dermpath) & kikoxp.com/posts/5083 (bone/soft tissue sarcoma pathology).

[@lisadolan689]

I’ll go look. My initial diagnosis was Wells.

[@kinludovico]

Great, just as usual! Love this live/on microscope teaching. IMHO, way better than dealing with the WSIs. Many many thanks!

[@emiliolemoine5612]

Thank you so much for this! Please, keep up the great content.

[@ramadanshatwan2205]

Great cases as usual, many thanks for this nice presentation

[@lisadolan689]

Dear Dr Gardener, do you have a slide of PyoDerma Gangrenosum? I’m clinically diagnosed and am also doing pstgrd HSc-Dermal. I would love to see a slide.
Ps. Loving this channel. Thanks for your efforts 🙌

[@JMGardnerMD]

Sorry to hear of your diagnosis! I have a video about PG here and it shows what it looks like microscopically: kikoxp.com/posts/4418. Best wishes for health and healing.