Journal Information
Vol. 111. Issue 7.
Pages 603-604 (September 2020)
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Vol. 111. Issue 7.
Pages 603-604 (September 2020)
Case for Diagnosis
DOI: 10.1016/j.adengl.2020.08.010
Open Access
Pearly White Papules on the Antihelix
Pápulas perladas en el antihélix
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M. Oro-Ayudea,
Corresponding author
marcosoroayude@gmail.com

Corresponding author.
, R.M. Hernández Cancelab, A. Flóreza
a Servicio de Dermatología del Complejo Hospitalario Universitario de Pontevedra, Gerencia de Gestión Integrada Pontevedra y O Salnés, Spain
b Servicio de Anatomía Patológica del Complejo Hospitalario Universitario de Pontevedra, Gerencia de Gestión Integrada Pontevedra y O Salnés, Spain
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Medical History

A 41-year-old man with no medical or surgical past history of interest was referred to the dermatology service due to skin lesions that had appeared 2 months earlier on both pinnae. The lesions were asymptomatic, and the patient reported no potential triggering event.

Physical Examination

Physical examination revealed 4 pearly papules distributed in a line on the antihelix of the left pinna (Fig. 1) and 2 lesions of similar characteristics on the right pinna.

Figure 1
(0.13MB).
Histopathology

The histopathology study showed a lymphohistiocytic infiltrate with palisading histiocytes surrounding a central area with necrobiosis and mucin deposit (Fig. 2).

Figure 2.

Alcian blue ×10.

(0.4MB).

[[?]]What is your Diagnosis?

Diagnosis

Granuloma annulare on the antihelix.

Clinical Course and Treatment

In this case, the lesions resolved after the biopsy and no treatment was required.

Comment

Granuloma annulare (GA) is a noninfectious granulomatous skin disease. It is a benign entity of unknown etiology and is common in clinical practice; it especially affects children and young adults and is more frequent in females. It generally presents on the wrists, ankles, hands, and feet in the form of annular erythematous papules with central lightening.1

There are 4 main types of GA. In the local variety, between 80% and 90% of all cases, the lesions appear at the aforementioned sites and with the typical morphology. The generalized form, which represents fewer than 15% of cases, affects the torso and extremities in the form of numerous erythematous or yellowish papules, which may coalesce to form annular or circinate plaques. The subcutaneous variety is rare. It typically affects children and manifests as fast-growing painless subcutaneous nodules, with overlying skin of normal appearance, located on the scalp, pretibial region, buttocks, and palmar and plantar regions. The perforating variety is also rare and manifests as erythematous papules that develop into umbilicated lesions with a squamous or scabbed center. Other less common types of GA have been described and the different types also tend to coincide.2

Very few cases of GA involving the outer ear have been published in the literature.3–6 Although GA is more common in women, most published cases involving the outer ear have been reported in boys or young men,3–6 and a large percentage of these are bilateral.3–5 Moreover, the lesions usually appear on the most exposed areas and it has therefore been suggested that small, repeated traumas may be implicated as a trigger, even when patients do not always identify them.

We report an atypical GA in terms of site of the lesions and in terms of morphology. This presentation is rare in the literature and a correct diagnosis, which is essential to avoid unnecessary interventions or treatments, with their potential complications, may pose a challenge.

Conflicts of interest

The authors declare that they have no conflicts of interest.

Acknowledgments

The authors would like to thank the Dermatology department of Complejo Hospitalario Universitario de Pontevedra, Spain, for their cooperation.

References
[1]
S.J. Schmieder, G.J. Schmieder.
Granuloma Annulare.
[2]
M. Corigliano, R.E. Achenbach.
Granuloma anular: un desafío diagnóstico y terapéutico.
Rev Argent Dermatol, 93 (2012),
[3]
Y.S. Cho, J.I. Kim, K.H. Song, K.H. Nam, J. Park, S.K. Yun, et al.
Auricular granuloma annulare in a child.
Int J Dermatol, 53 (2014), pp. 218-220
[4]
J. Dias Coelho, I. Viana, S. Correia.
Bilateral granuloma annulare of the external ear.
Eur J Dermatol, 20 (2010), pp. 409-410
[5]
J.G. Kim, S.H. Lee, T.-J. Yoon.
A case of atypical granuloma annulare involving both ears.
Ann Dermatol, 21 (2009), pp. 413-415
[6]
N. Raghava, J.R. Mitchard, R.P. Youngs.
Granuloma annulare presenting as multiple nodules on the pinna.
J Laryngol Otol, 118 (2004), pp. 640-642

Please cite this article as: Oro-Ayude M, Hernández Cancela RM, Flórez A. Pápulas perladas en el antihélix. Actas Dermosifiliogr. 2020;111:603–604.

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