Digital myxoid cyst (digital mucous cyst) - translucent skin bump/papule near fingernail

Excerpt from my dermatopathology board review video. Full video here: • Video . Enjoy!
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).
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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.
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[@faisalalghubaywi8191]

I just love how you’re getting me to pass my part 1 exam as a dermatology resident, THANK YOU!

[@wolpumba4099]

*Summary* * *Appearance:* Translucent, bluish, pale bump near the fingernail in the *proximal nail fold* (cuticle area). May be *ulcerated* or oozing. * *Microscopic Features:* * Pools of blue *mucin* under the epidermis (outer layer of skin). * Often resembles a small ganglion cyst located in the *proximal nail fold*. * May or may not have a connection to the underlying joint. * Usually lacks a *synovial lining*, instead has a dense layer surrounding the *mucin*. * Can have variable inflammation, *ulceration*, and reactive changes. * Sometimes mucin washes out during processing, leaving an empty cyst-like space. * Mucin can leak into surrounding dermis, mimicking focal cutaneous mucinosis or a *cutaneous myxoma*. * *Diagnosis:* * Even if the classic cyst structure is not seen, the presence of mucin in a bump from the *proximal nail fold* is highly suggestive of a digital mucous cyst. ## Glossary: * *Proximal:* Located closer to the center of the body. In this case, the part of your finger closer to your hand. * *Nail fold:* The skin fold that overlaps the sides and base of your fingernail. * *Synovial lining:* A specialized tissue that lines the inside of some joints and produces fluid that helps the joint move smoothly. * *Mucin:* A thick, slippery substance that acts as a lubricant in the body. It's similar to mucus. * *Ulceration:* A sore that forms on the skin or a mucous membrane, often with a breakdown of tissue. * *Cutaneous Myxoma:* A benign (non-cancerous) skin tumor characterized by an overgrowth of cells that produce mucin. i used gemini 1.5 pro to summarize the transcript

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[@JMGardnerMD]

There will be more soon don’t worry