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QUIZ SECTION Advances in dermatology and venereology
ActaDV Acta Dermato-Venereologica ActaDV
Erythematous Papular Lesions on the Neck: A Quiz
Alice MOUCHARD 1, Matthias TALLEGAS 2, Marie-Christine MACHET 2, 3, Laurent MACHET 1, 3 and Hélène CORNILLIER 1, 3 *
1
Department of Dermatology, 2 Department of Pathology, CHRU Tours, FR-37044 Tours, and 3 PRES Centre, Val de Loire University, University of Tours, Tours, France. * E-mail: drhcornillier @ gmail. com
A 14-year-old boy presented with an 8-month history of asymptomatic papules on his neck. The lesions first appeared on the left side and spread to the right side. The patient’ s personal and family medical histories were unremarkable, and he was not taking any medication. Clinical examination revealed erythematous papules with umbilicated and keratotic centres, arranged in linear and annular patterns on the neck( Fig. 1).
Fig. 1.( a, b) Erythematous papules with a keratotic centre on the left side of the neck.( c) Papules grouped in an annular pattern on the right side of the neck.
No other lesions were noted on skin examination and the clinical examination was otherwise normal. Complete blood count, C-reactive protein level, and renal and liver function test results were within normal limits. A skin biopsy was performed( Fig. 2).
What is your diagnosis? See next page for answer.
Fig. 2.( a) Intra-epidermal pseudo-cavity connected to the surface, filled with elastin and collagen fibres. Note the thickened epidermis and epithelial mild dermal inflammatory cells infiltrate( hematin-phloxin-saffron, × 200).( b) Higher magnification showing fragmented elastin fibres filling the intraepidermal cavity( orcein × 400).
doi: 10.2340 / 00015555-2971 Acta Derm Venereol 2018; 98: 822 – 823
This is an open access article under the CC BY-NC license. www. medicaljournals. se / acta Journal Compilation © 2018 Acta Dermato-Venereologica.