nail surgery techniques - apma surgery vlahovic.pdf · nail biopsy techniques •punch...
TRANSCRIPT
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NAIL SURGERY TECHNIQUES
TRACEY C. VLAHOVIC, DPM FFPM RCPS (GLASG)
ASSOCIATE PROFESSOR, J STANLEY AND PEARL LANDAU FACULTY FELLOW
TEMPLE UNIVERSITY SCHOOL OF PODIATRIC MEDICINE, PHILA, PA
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THE AGENDA
• Pincer nails
• Disappearing Nail bed
• Nail Biopsy techniques
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QUESTIONS TO ASK:
• When were your nails last normal?
• History of Raynaud’s, diabetes, medications, etc
• Ability to care for surgical site
• Activity level, what’s next in their life
• Consent
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EXAMINING THE NAILS
• No nail polish
• Good lighting
• Bend their knees and have them place
feet flat on exam chair
• Allows me to use the dermatoscope
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ALTERNATE VIEWS OF ANESTHESIA
EXTERNAL VIBRATORY DEVICE (BUZZY, MMJ LABS)
DISTAL WING BLOCK:
CREATING A “TOURNIQUET OF FLUID”
Dermatologic Therapy, Vol. 20, 2007, 68–74The Foot and Ankle Online Journal 9 (4): 6
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PATIENTS WHO HAVE DIFFICULTY TO ACHIEVE OR MAINTAIN LOCAL ANESTHESIA?
• “resistance” to certain local anesthetics
• Pts were injected with test wheals of lidocaine, bupivicaine, and mepivicaine,
area then scratched with a corner of an alcohol swab packet.
• Patients did not have reaction to lidocaine, mepivicaine, or all three, but most were
hypoesthetic to mepivicaine
Pain Physician. 2003 Jul;6(3):291-3.
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PINCER NAIL
• Aka Trumpet nails
• Cornelius and Shelley in 1968: Result of transverse overcurvature of the nail plate
that increases distally along longitudinal axis
• Great toenail
• Enlarged base of distal phalanx
• Traction osteophytes
• Hereditary vs Acquired
• Not the same as an ingrown nail
• Cosmetic and/or Painful
Dermatol Surg 2001; 27: 261-266
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MECHANOBIOLOGY
• Physical forces and changes in cell/tissue mechanics contribute to pathology
• Toenails are subject to constant physical forces
• Hypothesis: nails have an automatic curvature function to adapt to the daily
upward forces
• Imbalance: pincer nails
Plast Reconstr Surg Glob Open 2014;2:e115
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ACQUIRED
Mycoses. 2014 Jul;57(7):389-93
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CURVATURE INDEX
• A=Apparent width of the nail tip
• B= Traced length of nail tip
• B/A= curvature index
• Shows severity before and after
surgical intervention
Plast Reconstr Surg Glob Open 2013;1:e49
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CONSERVATIVE THERAPIES
• Trimming/Debridement
• Nail steel or plastic bracing (Sogawa method)
• Nail taping, nail splinting
• Keryflex nail resin
• Urea occlusion method
• Recurrence is high since not addressing underlying deformity
Plast Reconstr Surg Glob Open 2016
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SURGICAL THERAPIES
• Target the underlying deformity—if not, relapse
• Nail avulsion not recommended
• Targeting the lateral osteophytes on the distal phalanx DIPJ ligament issue
• Targeting the lateral matrix horns to reduce width of the nail bed via chemical
or surgical
• Other methods: dermal grafting, dermal flap
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SURGICAL TECHNIQUE: ZIGZAG NAIL BED FLAP METHOD
Arch Plast Surg 2015;42:207-213
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SURGICAL TECHNIQUE: INVERTED T INCISION METHOD (MODIFIED HANEKE’S METHOD)
Arch Plast Surg 2015;42:207-213
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RETROSPECTIVE REVIEW
• 20 nails with pincer vs control group
• Interphalangeal angles and base
widths were measured via
radiograph
• Zig-zag flap and Inverted T incision
A, width of the nail root; B, width of the nail tip; C, height of
the nail tip. Width index=B/A×100, height index=C/B×100.Arch Plast Surg 2015;42:207-213
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RETROSPECTIVE REVIEW, CONTINUED
• Radiographs: osteophytes 14/20
pincer nail group and
Interphalangeal angle significantly
higher in pincer vs control
• No difference in the indices between
zigzag and inverted T, followed 6
months after surgery
Control group Pincer nail group
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FROM ACROSS THE POND
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DISAPPEARING NAIL BED
• Coined in 2005 by Dr Daniel (Cutis 2005;76:325–327)
• A shortened or narrowed nail bed that is the result of long standing onycholysis
• 20% shorter than the bilateral nail
• Long standing onycholysis can cause epithelialization to occur and dermatoglyphics to
appear; distal nail ingrowth
• May occur on fingernails (onychophagia) or toenails (hallux most common)
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WHAT CAN CAUSE IT?
• Onychomycosis
• Onychogryphosis
• Trauma (blunt force or repetitive)
• Nail Surgery (ie iatrogenic)
• Biomechanics (ie hallux extensus)
• Other disorders that cause nail onycholysis: ie psoriasis, lichen planus, medications
• You do want to rule out subungual exostosis or other boney deformity first
Daniel et al Skin Appendage Disord 2017;3:15–17
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WEDGE EXCISION FOR DISAPPEARING NAIL BED
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RETRONYCHIA
• Proximal Ingrowth of Nail Plate
• Toenails or fingernails
• Women > men
• Trauma from footwear,
but…arthritis, idiopathic
• Treatment: total nail avulsion
J Am Acad Dermatol. 2008 Jun;58(6):978-83
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BENIGN TUMOR: ONYCHOMATRICOMA
• Benign tumor of the nail matrix
• Misdiagnosed as Onychomycosis
• “worm holes”
• J Am Acad Dermatol. 2017
Feb;76(2S1):S19-S21.
• J Foot Ankle Surg. 2017 May 27
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ONYCHOMYCOSIS AND ONYCHOMATRICOMA---TOGETHER?
• Skin Appendage Disord. 2016 May;1(4):209-12.
• Yellow discoloration, splinter hemorrhages, nail plate thickening
• Dermoscopy of nail plate (streaks and hemorrhage) vs distal nail (ruin
appearance)
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LONGITUDINAL MELANONYCHIA (LM)
Clin
Pod Med
Surg
33 (2016)
319-336
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NAIL BIOPSY TECHNIQUES
• Punch
• Inflammatory disorders, infectious, subungual hematoma evac, LM <3mm
• No nail plate avulsion, quick, fast recovery
• Nail dystrophy if performed in proximal matrix
• Shave
• LM, erythronychia
• Good for larger lesions, no primary repair, risk of nail dystrophy low
• Nail avulsion is needed
• Lateral longitudinal excision
• LM, erythronychia, inflammatory
• Sample of all parts of nail
• Post op pain, spicule, permanently narrowed nail plate
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PUNCH BIOPSIES FOR THE NAIL
• 3mm punch
• Can remove the nail plate (total or partial) or
punch through nail plate
• Nail matrix for melanoma and melanonychia
• Proximal vs distal matrix
• Nail bed punch good for inflammatory,
infectious, neoplastic (ie psoriasis, lichen
planus)
• Helpful to diagnose proximal subungual
onychomycosis
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SEQUELAE OF TOTAL NAIL AVULSION
• Even though we want to achieve maximum exposure, there are potential issues
with total nail avulsion:
• Dorsal pterygium formation
• Pain
• Disappearing nail bed
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ALTERNATIVES TO TOTAL NAIL AVULSION WHEN CONSIDERING A NAIL BED OR MATRIX BIOPSY: PARTIAL NAIL PLATE AVULSIONS
• Provide exposure without total lysis of nail
• Can replace the nail plate after to create a biologic dressing
• Allow you to visualize longitudinal melanonychia that might be difficult to see
once nail plate is removed
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ALTERNATIVES TO TOTAL NAIL AVULSION: TRAP DOOR AVULSION
• Good for visualizing distal matrix,
nail bed, and hyponychium
• Freer elevator
• Once you pass the onychodermal
band, much less resistance
• Replace nail plate to act as biologic
dressing
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TRAP DOOR TECHNIQUE FOR LONGITUDINAL ERYTHRONYCHIA
• J Am Acad Dermatol. 2011
Jan;64(1):167.e1-11
• Red vertically oriented streak
• Splinter hemorrhages
• Distal nail splitting
• R/o glomus, SCC, wart
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ALTERNATIVES TO TOTAL NAIL AVULSION:WINDOW
• Confined portion of nail bed
• Foreign body, tumor, hematoma
• Use #11 blade to score and pry
• Nail plate window can be
reattached with steri strip
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ALTERNATIVES…:LATERAL NAIL PLATE CURL
• Reflection of proximal nail fold for
issues with matrix and eponychium
• Free proximal nail fold, hemostat or
freer to dissect, then hemostat to curl
nail
• Replace nail as biologic dressing
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FOLLOWING AVULSION: MATRIX SHAVE BIOPSY
• JAAD 2007; 56:803-10
• LM in proximal or distal matrix
• >3mm wide
• Origin of band is scored with 1-2 mm
margins with #15 blade, then blade
turned parallel to matrix and shave
• May be placed on a paper and in a
cassette to prevent curling
• www.cta-lab.com/nail_resources.html
Dermatol Clin 33 (2015)
303–307
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COMPLICATIONS
• Nail dystrophy
• Bleeding
• Post op pain
• Cyst
• Spicule formation
• Scarring ***
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THANK YOU!!!! [email protected]