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: https://kikoxp.com/posts/5084 (dermpath) & https://kikoxp.com/posts/5083 (bone/soft tissue sarcoma pathology).

Other relevant posts, videos, and resources:

Our skin adnexal tumors made simple paper in @ArchivesPath: https://www.archivesofpathology.org/d... @EHFultonMD @JRKaley

Melanocytes vs Keratinocytes made easy video: https://kikoxp.com/posts/3802

Neurofibroma 101 video: https://kikoxp.com/posts/4091

MPNST 101 video: https://kikoxp.com/posts/4092

Bug bite reaction: https://kikoxp.com/posts/4791

Eccrine Syringofibroadenoma
WSI digital slide: https://kikoxp.com/posts/8159
Video: https://kikoxp.com/posts/11619

Fibroepithelioma of Pinkus (some regard it as basal cell carcinoma, fibroepithelioma type)
Images: https://kikoxp.com/posts/8178
Video: https://kikoxp.com/posts/11637

Basaloid follicular hamartoma
WSI digital slide (linear multiple basaloid follicular hamartoma): https://kikoxp.com/posts/8157
Video (linear multiple basaloid follicular hamartoma): https://kikoxp.com/posts/11616
Images (with CK20+ benign "passenger" Merkel cells): https://kikoxp.com/posts/11586

Angiosarcoma
Video (101): https://kikoxp.com/posts/3016
Video (short): https://kikoxp.com/posts/4495
Video (short – angiosarcoma plus rhinophyma): https://kikoxp.com/posts/6124
Video (CD34 negative, solid, spindle & epithelioid – AIP France 2021): https://kikoxp.com/posts/8666
Video (solid spindle angiosarcoma with Kaposi sarcoma-like areas): https://kikoxp.com/posts/9845
WSI digital slide 1: https://kikoxp.com/posts/3030
WSI digital slide 2: https://kikoxp.com/posts/6802
WSI digital slide 3 (CD34 negative, solid, spindle & epithelioid): https://kikoxp.com/posts/6168
Discussion of pros/cons of CD34 vs CD31 vs ERG in vascular tumors: https://kikoxp.com/posts/6167

EHE (epithelioid hemangioendothelioma)
Video (101): https://kikoxp.com/posts/3054
WSI digital slide https://kikoxp.com/posts/3031

Spindle cell hemangioma
WSI digital slide (best ever!): https://kikoxp.com/posts/3074
Image (“mini fat cell”-like endothelial vacuoles clue to diagnosis): https://kikoxp.com/posts/8665
Video (AIP France 2021 - bonus case): https://kikoxp.com/posts/8664
Video (SCH 101 & discussion of Maffucci syndrome): https://kikoxp.com/posts/3097
Video (SCH with “mini fat cell”-like vacuoles): https://kikoxp.com/posts/4741


Please check out my Soft Tissue Pathology & Dermatopathology survival guide textbooks: http://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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