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The Clinical Picture

Desquamating pustular rash

Kevin Bryan Uy Lo, MD and Zurab Azmaiparashvili, MD
Cleveland Clinic Journal of Medicine December 2019, 86 (12) 780-781; DOI: https://doi.org/10.3949/ccjm.86a.19061
Kevin Bryan Uy Lo
Albert Einstein Medical Center, Philadelphia, PA
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  • For correspondence: [email protected]
Zurab Azmaiparashvili
Albert Einstein Medical Center, Philadelphia, PA
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A66-year-old man presented with burning pain and erythema over the left axilla, and pustules that had ruptured and crusted over. The rash also involved the right axilla, trunk, abdomen, and face.

He said the symptoms had developed 3 days after starting to use ciprofloxacin eye drops for eye redness and purulent discharge that had been diagnosed as bacterial conjunctivitis. He was taking no other new medications. He was afebrile.

He was admitted to the hospital. Examination revealed a desquamating rash over the left axilla (Figure 1), with multiple ruptured and crusted-over pustules over the right axilla, chest, and abdomen (Figure 2). No mucosal lesions were noted. Laboratory testing showed a white blood cell count of 9.24 × 109/L (reference range 4.5–11.0) with 7.8% eosinophils (0%–4%). Blood cultures were negative.

Figure 1
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Figure 1

Desquamating rash over the left axilla.

Figure 2
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Figure 2

Multiple pustules over the chest and abdomen.

Skin biopsy study on the day after admission showed diffuse spongiosis with scattered eosinophils and a pustule beneath the stratum corneum. These findings, along with the timing and presentation of symptoms, confirmed suspicion of acute generalized exanthematous pustulosis related to the use of the eye drops.

The ciprofloxacin drops were stopped. The skin lesions were treated with emollients, topical steroids, and topical mupirocin. Improvement was noted 3 days into the hospitalization, as the lesions started to crust over and dry up and no new lesions were forming. The conjunctivitis improved with topical bacitracin ointment and prednisolone drops.

ACUTE GENERALIZED EXANTHEMATOUS PUSTULOSIS

The differential diagnosis of drug-related acute generalized exanthematous pustulosis includes Stevens-Johnson syndrome, pustular psoriasis, folliculitis, and varicella infection. The characteristic features of the rash and lesions and the temporal relationship between the start of ciprofloxacin eye drops and the development of symptoms, combined with rapid resolution of symptoms within days after discontinuing the drops, accompanied by skin biopsy study showing diffuse spongiosis with scattered eosinophils and a subcorneal pustule, confirmed the diagnosis of AGEP.

Key features of AGEP include numerous small, sterile, nonfollicular pustules on an ery-thematous background with associated fever and sometimes neutrophilia and eosinophilia.1 It usually begins on the face or in the intertriginous areas and then spreads to the trunk and lower limbs with rare mucosal involvement.1 It can be associated with viral infections, but most reported cases are related to drug reactions.2

Our patient’s case was unusual because AGEP triggered by topical medications is rarely reported, especially with ophthalmic medications.3 Drugs most commonly implicated are antibiotics including penicillins, sulfonamides, and quinolones, but other drugs such as terbinafine, diltiazem, and hydroxy-chloroquine have also been associated.2

AGEP may present with extensive skin desquamation, as in our patient, sometimes with bullae formation and skin sloughing manifesting as AGEP with overlapping toxic epidermal necrolysis.4

Diagnosis entails a careful review of medications, attention to lesion morphology, compatible disease course, and a high index of suspicion. Treatment is supportive and consists of stopping the offending agent, wound care, and antipyretics. Evidence for the use of steroids is weak.5

TAKE-HOME POINTS

AGEP should be considered in sudden-onset pustular desquamating erythematous rash related to use of a new medication. It is important to be aware that topical and ophthalmic medications are possible triggers. A thorough medication review should be done. Antibiotics are the most commonly implicated medications. An alternative medication should be tried. Treatment is supportive, as the condition is usually self-limiting once the offending medication is discontinued. Rarely, extensive desquamation and bullae formation may occur, which may be a manifestation of overlap features with toxic epidermal necrolysis.

  • © 2019 The Cleveland Clinic Foundation. All Rights Reserved.

REFERENCES

  1. ↵
    1. Speeckaert MM,
    2. Speeckaert R,
    3. Lambert J,
    4. Brochez L
    . Acute generalized exanthematous pustulosis: an overview of the clinical, immunological and diagnostic concepts. Eur J Dermatol 2010; 20(4):425–433. doi:10.1684/ejd.2010.0932
    OpenUrlCrossRefPubMed
  2. ↵
    1. Sidoroff A,
    2. Dunant A,
    3. Viboud C, et al
    . Risk factors for acute generalized exanthematous pustulosis (AGEP)—results of a multinational case–control study (EuroSCAR). Br J Dermatol 2007;157(5):989–996. doi:10.1111/j.1365-2133.2007.08156.x
    OpenUrlCrossRefPubMed
  3. ↵
    1. Beltran C,
    2. Vergier B,
    3. Doutre MS,
    4. Beylot C,
    5. Beylot-Barry M
    . Acute generalized exanthematous pustulosis induced by topical application of Algipan. Ann Dermatol Venereol 2009;136(10):709–712. French. doi:10.1016/j.annder.2008.10.042
    OpenUrlCrossRefPubMed
  4. ↵
    1. Peermohamed S,
    2. Haber RM
    . Acute generalized exanthematous pustulosis simulating toxic epidermal necrolysis: a case report and review of the literature. Arch Dermatol 2011; 147(6):697–701. doi:10.1001/archdermatol.2011.147
    OpenUrlCrossRefPubMed
  5. ↵
    1. Feldmeyer L,
    2. Heidemeyer K,
    3. Yawalkar N
    . Acute generalized exanthematous pustulosis: pathogenesis, genetic background, clinical variants and therapy. Int J Mol Sci 2016; 17(8). pii:E1214. doi:10.3390/ijms17081214
    OpenUrlCrossRef
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Cleveland Clinic Journal of Medicine: 86 (12)
Cleveland Clinic Journal of Medicine
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Desquamating pustular rash
Kevin Bryan Uy Lo, Zurab Azmaiparashvili
Cleveland Clinic Journal of Medicine Dec 2019, 86 (12) 780-781; DOI: 10.3949/ccjm.86a.19061

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Kevin Bryan Uy Lo, Zurab Azmaiparashvili
Cleveland Clinic Journal of Medicine Dec 2019, 86 (12) 780-781; DOI: 10.3949/ccjm.86a.19061
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