biopsy boot camp · –lidocaine with epi is acidic (ph of 3.5-5.5) causes pain •5 ml nahco3 to...
TRANSCRIPT
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Basil S. Cherpelis, M.D.
MINI-SYMPOSIUM
Procedural Bootcamp
• Getting Started/Avoiding Trouble
• Skin Biopsy – When, Why & How
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Sturgeon
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Procedural Bootcamp
“A Whole Lot Of Properly”
• How to properly perform a biopsy
• How to properly administer anesthesia
• How to properly sterilize the surgical field
• How to properly perform other simple
dermatologic procedures
• Pearls to avoid pitfalls
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ABC’s of Skin Biopsy
“Why, What, When and How”
• Why recommend biopsy or removal
• Present options and rationale to patient
• Record informed consent
• Document location of biopsy
• Clean and anesthetize area
• Obtain specimen
• Discuss aftercare and plan follow-up
• Complete documentation and track biopsy
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Why Biopsy?
• Inflammatory Lesion or Rash
– Differentiate multiple processes
– Guide treatment
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Why Biopsy?
• Suspicious for Cancer
– Plan appropriate treatment
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Why Biopsy?
• Suspicious for Infection
– Identify organism
– Guide treatment
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Why Biopsy?
• Cosmetic or Symptomatic Removal– Flatten lesion for cosmetic
reasons
– Reduce symptoms
– Pearl – Intradermal nevi may re-pigment after removal
– Pearl – Liquid nitrogen can remove pigment
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Present Rationale and Options
• Rationale
– Obtain diagnosis, plan
treatment or improve
symptoms
• Options
– Biopsy lesion or rash
– Monitor (photograph
and measure lesion)
– Treatment trial prior to
biopsy
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Informed Consent
• A process, not a signature on a form
• “Informed” is the key
• Discuss treatment options and all risks
• Be specific depending on lesion and site
• Answer all questions
• Document in note
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Informed Consent - Pearl
• Bleeding, scarring, discomfort, infection, non-diagnosis and need for further treatment or re-biopsy
• Document informed consent well
• “All questions were answered and patient verbalized understanding of risks”
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Special considerations Pearls
• Is the patient leaving town or relocating in the near future?– Obtain future address, phone number or refer to
dermatologist in new location
• Is the patient allergic/sensitive to Band-Aids/adhesive– substitute with paper tape over Telfa non-stick dressing
• Does the patient have any upcoming important social functions, portraits, speaking engagements, medical procedures planned?– Delay biopsy
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Special considerations Pearls
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Document Location of Biopsy
• Photograph
• Three point system with three anatomic references
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Location of Biopsy - Pearl
• Label sites for multiple biopsies prior to photograph
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Site Preparation For Biopsy
• Clean procedure
– preoperative antibiotics not necessary
– Except infected lesion or certain mucosa
– Must cover Staphylococcus aureus and administer
approximately 1 hour prior to procedure
• Isopropyl alcohol wipe
• Povidone iodine
• Chlorhexidine scrub
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Sterilize The Surgical Field
• Iodophors (betadine)– Broad spectrum (G+, G- and fungi)
– Must allow to dry to be effective and inactivated by blood
– May cause contact allergy
– May cross react with radiopaque iodine
– Obscures surgical field
– May cause prolonged skin discoloration
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Sterilize The Surgical Field
• Chlorhexidine (Hibiclens)– Broad spectrum (G+, G-, Fungi and anti-pseudomonal)
– Stronger activity than iodophors
– Rapid onset and not inactivated by blood
– Does not obscure surgical field
– No absorption or systemic toxicity
– Persists on the skin with prolonged suppression of
bacterial growth
– Irritating to eyes (keratitis) and middle ear (otitis)
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Sterilization Pearl
• Betadine for the face and Hibilens for the
body
• Mark the edges of the lesion, scrub with
antiseptic and administer anesthesia
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Anesthetize All Your Paying
Customers
• Topical
– EMLA
– ELA-Max
• Local
– Lidocaine
– Marcaine
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Anesthetize All Your Paying
Customers
• Lidocaine
– 1% Lidocaine in epinephrine (1:100,000)
– Max dose
• 5 mg/kg plain (350 mg for 70 kg person)
• 7 mg/kg with Epinephrine (500 mg for 70 kg person)
– Epinephrine constricts vessels, creating a
bloodless field, allows larger doses of lidocaine
and prolongs the duration of anesthetic
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Anesthetize All Your Paying
Customers• Lidocaine
– Pregnancy category B
• Caution during the first 4 months
– Caution with severe HTN or CAD
– Lidocaine with epi is acidic (pH of 3.5-5.5) causes
pain
• 5 ml NaHCO3 to 50 ml bottle of lidocaine with Epi
• Keep refrigerated, labeled with date and use within one
week
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Anesthetizing for Biopsy or Surgery
• 1% Lidocaine with 1:100,000 epinephrine
– Check for history of epinephrine sensitivity; best to use lidocaine without epinephrine if history is positive
– Check for history of preservative allergy; unpreserved Xylocaine is available (single use vial)
– True lidocaine allergies are exceedingly rare
– Questionable patients with good history should be sent for an allergy evaluation
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Allergy Pearl
• Local anesthetic allergy
– Alternatives
• Use preservative free amide (or ester)
• Intradermal 1% diphenhydramine
• Intradermal NS with benzoyl alcohol preservative
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Anesthetize All Your Paying
Customers
• Bupivacaine (Marcaine)– Longer onset but longer duration
– Used for prolonged or staged procedure
– Max dose
• 175 mg for 70 kg person
• 225 mg for 70 kg person with epinephrine
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Anesthetize All Your Paying
Customers
• Topical anesthetics
– EMLA - 2.5% Lidocaine and 2.5% Prilocaine
• apply thick, occluded paste 1 hour prior to procedure
• prilocaine can cause methemoglobinemia (caution with
large areas, damaged skin or infants)
– ELA-Max - 4 or 5% Lidocaine
• doesn’t need to be occluded and equivalent anesthesia in
one third the time
– Not effective for palms or soles
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Topical Anesthetics
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Anesthetizing For Biopsy
• Mark the lesion first
• Place patient in supine or prone position
• Use anesthesia to “raise” the lesion
• Reduce pain– Quick stick and slow injection
– Create small Intradermal wheal
– Inject into subQ fat through wheal
– Use 30-gauge needle
– Buffer with sodium bicarbonate
– Consider pinching skin or applying ice or LMX prior
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Anesthetizing For Biopsy
• Mark the lesion first
• Use anesthesia to “raise” the lesion
• Protects important structures and helps facilitate excising under the tumor
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Anesthesia Pearls
• To Decrease Pain
– Exude confidence
– Perfect technique
– APPLY ICE
– Topical anesthetic (“so-so”)
– Use verbal reassurance and distracting stimuli
• Conversation
• Hand holding
• Pinch skin
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Anesthesia Pearls
• Anesthetizing Digits
– Using epinephrine is OK
– Proper technique is the key
– Do not inject into the neuro-vascular bundle
– Decreases use of tourniquet and less anesthesia is needed
Plast Reconstr Surg 2007; 119:260-6
JAAD 2004; 51:755-9
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Properly Position the Patient
• Relaxes the patient
• Improves surgical results
• Saves your back
• Minimizes risk of injury to patient and
surgeon
• Avoids Vasovagal Injury
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Properly Position the Patient
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Shave Biopsy
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Shave (Tangential) Biopsy
• Meant to flatten a raised lesion
• Little scarring
• Often for cosmetic removal
• 15 blade
• One side of double edge razor blade
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Shave Biopsy Indications
• Any raised lesion
– Basal cell carcinoma
– Squamous cell carcinoma/Keratoacanthoma
– Merkel cell carcinoma
– Seborrheic keratosis
– Verruca
– Intradermal nevi
– Sebaceous hyperplasia
– Dermatofibroma
Pigmented BCC
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Cutaneous Medicine & Surgery 1996
Shave Biopsy
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Basic Cutaneous Surgery 1991
Shave Biopsy
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Tools Of The Trade
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Biopsy Taco
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Scallop Biopsy
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Scallop Biopsy
• Deeper than shave biopsy
• Includes deep dermis
• Leaves an indentation in skin
• More scarring
• More diagnostic
• Can remove entire lesion
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Scallop Biopsy Indications
• Flat (Macular) lesions
– Atypical or junctional nevi
– Squamous cell carcinoma (especially in situ)
– Superficial basal cell carcinoma
– Inflammatory disorders
– Remove entire lesion
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Scallop Biopsy
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Basic Cutaneous Surgery 1991
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Scallop Biopsy
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Scallop Biopsy
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Scallop Biopsy - Pearls
• Biopsy while edematous wheal present
• Stretch skin
• Gentle sawing motion
• Maintain curved blade
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Punch Biopsy
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Punch Biopsy
• Used to obtain cylinder of skin
• Includes epidermis to fat
• More time consuming and expensive
• Longer healing?
• More scarring?
• Can also remove entire lesion
• Generally a 4 mm punch is adequate
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Punch Biopsy Indications
• Macular and deeper lesions
– Inflammatory dermatoses
– Disorders of hair
– Tumors
– Removing entire lesion
• Small dysplastic nevi
• Blue nevi
• Dermatofibromas
• Small Intradermal nevi on face
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Punch Biopsy
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Punch Biopsy
• Press firmly with punch, using a rotating motion, alternating clockwise and counterclockwise
• Upon penetrating the dermis, there will be a “give” sensation and a decrease in resistance to the twisting motion.
• Stretch skin to create oval in “opposite” direction
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Punch Biopsy
• Don’t crush specimen!
– Use the needle to elevate the specimen and then the
specimen should be cut free below any visible fat
• Hemostasis is achieved via direct pressure,
packing with Gelfoam or interrupted superficial
suturing (nylon)
– Patient to return for suture removal at the time of
results disclosure in 5-7 days for facial sutures or
approximately 10-14 days for other anatomic locations
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Basic Cutaneous Surgery 1991
Cutaneous Medicine & Surgery 1996
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Punch Biopsy Video
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Punch Biopsy Pearl
• 4-mm punch usually adequate
• 2° intention healing cosmetically acceptable
• Hemostasis
– Pressure dressing (“poor man’s pressure dressing”)
– QR Powder or Gel Foam
– “Figure of 8” stitch
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Incisional Biopsy
• Used to obtain a wedge of tissue
• Provides a large amount of tissue
• Takes part of a large or deep seated lesion
• Extends deep into fat
• More expensive
• Higher morbidity
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Incisional Biopsy Indications
• Vasculitis
• Panniculitis
• Large/deep tumors
• Adequate tissue for
culture
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Basic Cutaneous Surgery 1991
Incisional Biopsy
• 3 to 4 mm wide
• Ellipse down to desired
level
• Incision angled toward
center
• Non-ulcerated area
including edge
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Excisional Biopsy
• Used to remove entire lesion
• Extends to fat
• Higher cost and morbidity
• 1–2 mm outside of clinically obvious border
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Excisional Biopsy Indications
• Melanoma
• Atypical nevi
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Biopsy Site Selection - Pearl
• For inflammatory lesions
– Newest lesions yield the most specific findings
– New lesions are more pink (rather than red,
purple or brown) and edematous
– Avoid excoriated, blistered or crusted lesions
– Consider multiple biopsies
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Biopsy Site Selection
Inflammatory Lesion
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Why Biopsy? - Pearl
• Beware the recurring buttock/flank rash
• CTCL (Mycosis Fungoides)
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Biopsy Site Selection - Pearl
• For tumors
– Avoid crusted and
necrotic tissue
– Biopsy the thickest part
– Include edge toward
center of lesion
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Biopsy Site Selection - Pearl
• For infectious etiologies– Caution with bacteriostatic
normal saline
– DO NOT use “rinsed” formalin
specimen bottle
– CALL pathology lab prior to
biopsy!
– Sterile urine cup with gauze and
? moisture
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Biopsy Site Selection - Pearl
• For suspected blistering
disorders
– Edge of lesion including
normal skin and blister
– Michel’s medium for direct
immunofluorescence
– May split biopsy for H&E
and DIF
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Collecting Specimen
• Label bottle
– Patient’s name, date, site
• Normal H&E staining
– 10% neutral buffered formalin
• Culture for suspected infection
– Avoid bacteriostatic saline
– Ask lab about preferred medium
• Special medium
– Michel’s medium for direct immunofluorescence
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“Aftercare” For Skin Biopsy
• Hemostasis
– Aluminum chloride hexahydrate (Drysol) and pressure
– Light electrodessication
– QR Powder
• Dressing
– Apply antibiotic ointment (or Aquaphor) and Band-Aid
– Pressure bandage (Telfa, 2 x 2 gauze and Band-Aid or tape)
– “Poor man’s pressure bandage”
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“Poor Man’s Pressure Bandage”
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• Keep dry for 24 hours
• Cleanse daily thereafter with soapy water
• Discourage use of hydrogen peroxide
• Apply Vaseline petroleum jelly or other ointment (Neosporin, Bacitracin, etc.) and cover with Band-Aid or equivalent daily
• Don’t let the wound to dry out or a hard scab to form
• Give written instructions
• Give follow-up instructions
“Aftercare” For Skin Biopsy
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Documentation And Biopsy Tracking
• Set strict protocol to track biopsy
– Label bottle (patient name, site and date)
– Ensure specimen is in the bottle and confirm site
– Take to designated staging area
– Log specimen in pathology book/log
– Ensure specimen is picked up by pathology laboratory
– Document the diagnosis and date report received in the log
– Document notification to patient
– Document when treatment complete
– Perform routine QA on log
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PROCEDURAL PEARLS
• ALWAYS ENSURE THE SPECIMEN IS IN THE BOTTLE - as it is transferred from the blade into the bottle AND before the bottle is closed and removed from the procedure tray
• Teach your staff, regardless of their work station, to do the same thing
• Ensure a routine chain of command; it helps when specimens are missing, switched, or mislabeled
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Follow-up Options
• Call patient only if treatment needed
• Have patient call for biopsy results
• Have all patients follow-up for results
• Automated system that informs patient of results
If patients do not routinely follow-up for results, quality control for tracking biopsies must be strict!
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Insurance coding
• 11100 = single biopsy of the skin
• 11101 = subsequent biopsies number of units
• Site specific codes:
– 40490 = lip
– 67810 = eyelid
– 54100 = penis
• D48.5 – ICD-10-CM code for neoplasm of
undetermined origin
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Insurance Coding: Modifiers
• 25 modifier
– necessary if an E&M service was provided on
the same day as the biopsy
• XS (59) modifier
– used if there are other, distinct and separate
procedures provided the same day
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Pitfalls And Complications
• Vasovagal response
– Place patient in Trendelenburg position
• Excessive bleeding after biopsy
– Patient to hold firm pressure for 20 minutes
• Infected biopsy
– Beware antibiotic or adhesive allergy
– Culture and treat if PAIN is present
• Lost biopsy or insufficient material
– Re-biopsy
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Nail Biopsy
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Nail Anatomy
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Nail Biopsy
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Nail Biopsy
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Inflamed Epidermal Cyst - Pearl
• Tender, enlarged, red mass
• Fluctuant
• May see punctum
• History of previous cyst
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Inflamed Epidermal Cyst - Pearl
• Treatment
– Intralesional injection of 3.3 mg/cc Kenalog with
lidocaine (without epinephrine)
– Incise with 11- blade (1.0 cm)
– Express material and explore with scissors
– Consider curettage
– Irrigate with sterile NS/H2O
– Pack with ¼” iodoform gauze
– Antibiotics optional (if true abscess suspected)
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Epidermal Cyst Excision - Pearl
• Do not inject anesthesia into cyst
• Carefully use blunt dissection to
remove entire cyst wall
• Multi-layer closure to close the
potential space
• Beware of heterotopic CNS tissue
on facial/scalp lesions
– Collar of hair surrounding lesion
– Often midline and present at birth
or early childhood
– Consider imaging prior to excision
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Beware Cyst Imposters
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Final Pearls
• Properly inform patient and document well
• Document location well (3-point system or photograph)
• Mark the lesion prior to anesthesia
• Don’t crush the punch biopsy
• Suspect melanoma? - Get the base (scallop, punch or excision)
• Large ill-defined lesion? - Consider multiple biopsies
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Final Pearls
• Know where to biopsy
– Rash – newest lesion
– Tumor – thickest part
– Blister or ulcerated/necrotic – edge of lesion
• Patient on anticoagulant medications? Cauterize or pressure bandage
• Get a system in place to track biopsies (“be a creature of habit”)
• “When in doubt, whack it out”