Rapid Board Review: Cysts & Benign Epidermal Lesions (Dermpath Dermatology Pathology)

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).
38 classic dermpath cases in 1.25 hours. Rapid fire board review style virtual slide session for my dermatology residents. I recorded so I could share it with all of you, too. Enjoy!
Virtual slides courtesy of my friend and colleague, the amazing Dr. Tammie Ferringer (the platform they are hosted on doesn't have the ability for public sharing of the WSI files...sorry!)
List of entities discussed (click time stamp to skip to that part of video):
HUGE thanks to Dr. Ziba Rahbar for typing up the list of entities with corresponding time stamps!
1. Warty dyskeratoma-----------------------------------------0:10
2. Large cell acanthoma---------------------------------------2:03
3. Pilar sheath acanthoma (vs dilated pore of Winer)--4:40
4. Irritated Seborrheic Keratosis (SK)-----------------------7:00
5. Branchial cleft cyst-------------------------------------------9:06
6. Pilonidal cyst/sinus/tract----------------------------------10:50
7. Ganglion cyst-------------------------------------------------13:25
8. Inverted follicular keratosis (IFK)------------------------17:17
9. Ruptured pilar cyst------------------------------------------20:01
10. SK with amyloid--------------------------------------------23:40
11. Steatocystoma----------------------------------------------28:15
12. Focal acantholytic dyskeratosis/Grover--------------30:25
13. Mucocele-----------------------------------------------------33:33
14. Dermoid Cyst------------------------------------------------35:23
15. Clonal SK-----------------------------------------------------36:53
16. Clear Cell Acanthoma (PAS ±diastase)----------------38:33
17. Epidermolytic hyperkeratosis (EHK)------------------40:50
18. Chondrodermatitis nodularis helicis (CNH)---------43:00
19. Clear cell Bowen's/SCC in situ--------------------------46:25
20. Axillary granular parakeratosis-------------------------48:04
21. Verrucous cyst----------------------------------------------48:57
22. Ossifying pilar cyst-----------------------------------------49:40
23. Confluent and reticulated papillomatosis (CARP)--51:50
24. Porokeratosis------------------------------------------------53:30
25. Ruptured epidermal inclusion cyst (EIC)-------------55:10
26. Proliferating pilar tumor---------------------------------56:12
27. Lichenoid porokeratosis---------------------------------58:00
28. Digital mucous cyst---------------------------------------59:30
29. Vellus hair cyst---------------------------------------------1:00:38
30. Ruptured molluscum cyst------------------------------1:01:20
31. Bronchogenic cyst----------------------------------------1:02:30
32. Pilomatricoma--------------------------------------------1:04:25
33. Verruca plana (flat wart)--------------------------------1:05:15
34. Trichilemmoma-------------------------------------------1:05:55
35. Hidrocystoma---------------------------------------------1:08:25
36. Cutaneous ciliated cyst----------------------------------1:09:20
37. Median raphe cyst-----------------------------------------1:10:07
38. Epidermodysplasia verruciformis---------------------1:13:45
Please check out my Dermatopathology survival guide textbook: 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).

[@maxbackman2671]

All I can do is salute you king of pathology pedagogy! ...and subscribe, and put a like on every video, and on every positive comment of every video. Immeasurable gratitude from Sweden!

[@JMGardnerMD]

You made my day. Thank you!

[@evelyne7071]

Thank you foe explaining the difference between a keratin whorl and a keratin pearl, especially in regards to the malignant location of the pearls.

[@tamilarasirenganathan8243]

This was really awesome.

[@roselynmakaza1363]

You sir are a legend.Your videos have saved my life and those of my colleagues over here in England.

[@JMGardnerMD]

So glad to be of service! My best wishes to you and your colleagues in England!

[@eduardoweiss123]

Excellent thanks

[@ghadabashat5138]

Many thanks.

[@malinigoswami8526]

I learnt a whole lot of things today.. thanks

[@priyankamaheshwari5033]

Warry dyskeratoma looked like SCAP to me.. a bit confused

[@joshuasamsoondar]

do you have a general approach to these types of lesions? i.e. how do you generate a differential? ...or do I just need to memorize 38 different kinds of cysts/lesions..?

[@JMGardnerMD]

Figuring out what type of lining epithelium the cyst has is the first step. Then see if there are adnexal structures attached to the cyst. Then check your anatomic site. Those help narrow down the differential a lot and make it easier to search textbook to see what you are dealing with.

[@joshuasamsoondar]

@@JMGardnerMD Thank you! that's a helpful starting point.

[@priyankamaheshwari5033]

Warty dyskeratoma and SCAP looks similar , is lack of plasma cells the difference?

[@JMGardnerMD]

Presence of Plasma cells is one difference. But in SCAP The spaces are truly ductal/glandular. They are lined by double layer cuboidal to columnar epithelium often with apical snouts. In warty dyskeratoma, the spaces are not truly glands or ducts but rather are the result of acantholysis and dyskeratosis. You will see corps ronds and grains (dyskeratosis) in warty dyskeratoma but not in scap. I have more videos about both entities here kikoxp.com/posts/5084