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Botulinum Toxin a Treatment of Overactive Corrugator Supercilii in Thyroid Eye Disease 529 Br J Ophthalmol: First Published As 10.1136/Bjo.82.5.528 on 1 May 1998

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Botulinum Toxin a Treatment of Overactive Corrugator Supercilii in Thyroid Eye Disease 529 Br J Ophthalmol: First Published As 10.1136/Bjo.82.5.528 on 1 May 1998 528 Br J Ophthalmol 1998;82:528–533 Botulinum toxin A treatment of overactive Br J Ophthalmol: first published as 10.1136/bjo.82.5.528 on 1 May 1998. Downloaded from corrugator supercilii in thyroid eye disease Jane M Olver Abstract appearance is physically and psychologically Background/aim—Patients with thyroid disabling. The frown is characterised by eye disease with upper eyelid retraction vertical glabellar furrowing and an altered eye- often develop overaction of the accessory brow contour, with bunching up of the medial muscles of eyelid closure, the glabellar eyebrow, a medial brow ptosis, and often a muscles corrugator supercilii and deep horizontal line over the bridge of the procerus. The resultant glabellar furrow- nose. Some patients have referred to this ing (frown lines) contributes to the typical appearance as an “angry scowl”. These facial thyroid facies. The aim of this study was to lines are the result of chronic contraction of evaluate the use of botulinum toxin A corrugator supercilii and procerus muscles reversible chemodenervation of the gla- pulling on the skin, and diVer from fine facial bellar muscles as adjunctive treatment in wrinkles which are largely due to dermal colla- the rehabilitation of patients with thyroid gen age changes.1 eye disease. It is well recognised that flattening of the Methods—14 patients (13 females) ages glabellar region occurs with botulinum toxin A 39–76 years (mean 52) with inactive thy- treatment of blepharospasm2–4; this observation roid eye disease and associated medial led to the specific treatment of glabellar hyper- eyebrow ptosis and prominent glabellar function lines with toxin.4–8 frown lines were recruited. All patients The aim of this study was to evaluate the use had a history of upper eyelid retraction. of botulinum toxin A chemodenervation of Each patient was treated with a single corrugator supercilii and procerus, as an botulinum toxin injection (Dysport 0.2 ml, adjunctive treatment in the rehabilitation of 40 units) into each corrugator supercilii patients with thyroid eye disease with an angry and sometimes procerus muscles as an looking frown. outpatient procedure. The eVectiveness and acceptability of the treatment was 9–13 assessed clinically and from a patient Anatomy See Figure 1. questionnaire. http://bjo.bmj.com/ Results—The injections were tolerated by The glabellar muscles, corrugator supercilii, 13/14 (93%) patients. There was resultant and procerus are both accessory protractors of flattening of the glabellar region and the upper lid, supplied by the facial nerve. improvement of medial eyebrow contour Their action helps reduce glare in bright in all patients, with onset of paralysis sunlight by drawing the medial end of the eye- within 1 week. All patients reported a sub- brows medially and inferiorly, thus acting as jective improvement in appearance. Side accessory muscles of upper eyelid closure. eVects included one patient (7%) with They are also mimetic muscles which are typi- on September 23, 2021 by guest. Protected copyright. reversible partial ptosis. The beneficial cally contracted in anger or perplexity. They eVect lasted 4–6 months, with a gradual form part of the superficial musculoaponeu- return of function. Repeat treatment was rotic system (SMAS) of the upper face. indicated where there was persistent Corrugator supercilii is a small pyramidal upper eyelid retraction and protractor muscle at the medial end of the eyebrow, in overaction. most part deep to the frontal part of occipito- —Botulinum toxin A chemo- frontalis and the orbicularis oculi. It originates Conclusion 11 denervation of the glabellar muscles in from deep orbicularis oculi fibres, frontal these patients was eVective and accept- bone, and frontal process of the maxilla at the 9–11 able. Chemodenervation should be con- superomedial orbital rim. From the medial sidered in the rehabilitation of patients end of the eyebrow the fibres pass laterally and with thyroid eye disease where there is slightly upwards, through the frontalis- upper eyelid retraction and overacting orbicularis interdigitation, to insert into the protractors resulting in a thyroid frown. dermis of the middle third of the eyebrow Once the eyelid retraction has been suc- above the supraorbital margin. The supratro- cessfully treated by surgery, the need for chlea nerve and supraorbital nerve penetrate further glabella muscle chemodenerva- the corrugator muscle before passing superfi- tion is considerably reduced. cially. The action of paired corrugator super- Western Eye Hospital, (Br J Ophthalmol 1998;82:528–533) cilii muscles is to draw the eyebrows down- Marylebone Road, wards (inferiorly) and medially, producing London NW1 vertical glabellar furrows.10 11 13 Contraction JMOlver Patients with thyroid eye disease may have a occurs particularly in bright sunlight where it is Accepted for publication typical staring facies with proptosis, upper lid acting as an accessory protractor to orbicularis 19 November 1997 retraction, and glabellar frown. Their altered oculi. Botulinum toxin A treatment of overactive corrugator supercilii in thyroid eye disease 529 Br J Ophthalmol: first published as 10.1136/bjo.82.5.528 on 1 May 1998. Downloaded from Figure 1 The corrugator supercilii muscles interdigitate with both frontalis and orbicularis at the medial end of the eyebrow. Methods Patients with thyroid eye disease who had clinically apparent overaction of corrugator supercilii plus or minus procerus muscles were identified by ophthalmologists in the thyroid and lid clinics at Moorfields Eye Hospital. The ophthalmologists assessed the eyebrow and eyelid contour and height as part of the normal thyroid eye disease assessment. Where con- stant glabellar furrowing from obviously active corrugator supercilii muscles was identified as a problem, the patient was invited to take part in the study. The study had full ethics committee approval and each patient gave informed consent. http://bjo.bmj.com/ All patients had inactive thyroid eye disease and were euthyroid at the time of injection. All patients had a history of chronic upper lid retraction of 2–10 years’ duration (mean 4.3 years) and had noticeable vertical glabellar fur- rowing plus or minus a horizontal glabellar hyperfunction line, giving them a thyroid on September 23, 2021 by guest. Protected copyright. frown. The injections were given as an outpatient procedure with the patient sitting upright in an Figure 2 (A) Corrugator supercilii is easily palpated by examination chair. The glabellar region of the asking the patient to contract these muscles. (B) Botulinum toxin A is injected diagonally through the thick glabellar forehead was lightly cleaned with an alcohol skin into the bulk of the muscle. The needle is directed wipe (Steret, Greton Prebbles Ltd). The medial and inferiorly. The muscle must be relaxed during glabellar muscles were first identified by asking the injection to reduce discomfort. the patient to contract them, then the injection made deep to the thick glabellar skin, at a point The procerus is a small fasciculate muscle lateral to the glabellar lines (not into the lines), continuous with the medial side of frontalis. It into the relaxed muscle. Botulinum toxin A originates from the aponeurosis of the trans- verse nasalis, periosteum of the nasal bones, (Dysport), 0.2 ml (40 units), was injected into and perichondrium of the upper lateral carti- each corrugator muscle using a fine diabetic lages. It inserts into the glabellar skin. It has syringe with 27 gauge needle (Fig 2). Botuli- similar actions to corrugator supercilii in that it num toxin A, 0.05 ml (10 units), was injected helps to reduce the glare of bright sunlight by into the procerus muscle from the mid glabel- drawing the medial end of the eyebrow down- lar region, vertically down towards the nasal wards. Procerus is also an elevator of the nose, bridge in selected patients. to shorten it.91112 The eVect of a single injection of botulinum In thyroid eye disease the upper lid retrac- toxin A was assessed clinically and by question- tion, photophobia, and ocular discomfort act naire. Clinical and photographic documenta- as a stimulus for contraction of these accessory tion was made of the glabella appearance before muscles of eyelid closure (protraction). and at regular interval after botulinum toxin A 530 Olver Br J Ophthalmol: first published as 10.1136/bjo.82.5.528 on 1 May 1998. Downloaded from Figure 3 This 67 year old female thyroid patient had bilateral upper eyelid retraction for 5 years. Two years after bilateral Henderson’s procedures, she still had prominent glabellar lines and bunching of the medial end of the eyebrows. She received botulinum toxin A injections into both corrugator supercilii and procerus muscles. After treatment she could not contract her glabellar muscles even with the greatest eVort—the glabellar region remained smooth while the palpebral apertures narrowed (orbicularis oculi) and lateral nasal folds formed (nasalis) from increased facial nerve activity. These photographs show the pretreatment, early post-treatment (2 weeks) and longer term post-treatment (4 months) eVects. Glabellar region: (A) Pretreatment. Relaxed. (B) Pretreatment. Actively contracting. (C) Two weeks after treatment. Relaxed. (D) Two weeks after treatment. Actively trying to contract. (E) Four months after treatment. Relaxed. (F) Four months after treatment. Actively trying to contract. chemodenervation. Clinical measurements in- while two (14%) estimated 90% paralysis and cluded
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