Forum for Nordic Dermato-Venereology Nr 4, 2019 | Page 29

Quiz
Bullae on the Index Finger in a Boy Suffering from Recurrent Cold Sores:
A Quiz
G eorg A uthried 1
and
M athias T iedemann S vendsen 2
Landesklinikum Amstetten, Krankenhausstrasse 21, AT-3300 Amstetten, Austria, and 2 Department of Dermatology and Al-
lergy Centre, Odense University Hospital & Institute of Clinical Research, University of Southern Denmark, Odense, Denmark.
E-mail: [e-mail]
1
A
7-year-old boy was referred to the paediatric ward because
of a large painful bulla on the right index finger. Over a
week, multiple crops of vesicles on the volar side of the right
index finger had developed into a confluent bulla. The boy
had a medical history of recurrent cold sores and had an oc-
casional habit of gnawing the skin on his finger, but he was
otherwise healthy. At the admission, there was noted a large bulla on the right
index finger with discrete surrounding erythema and a honey-
combed lesion on discrete erythematous background located
centrally on the upper lip (Figs. 1 and 2). He was afebrile and
had no other complaints except pain from around the sore
on the finger.
Fig. 1. Large bulla on the right index finger with discrete surrounding
erythema. Fig. 2. A honeycombed lesion on discrete erythematous background
located centrally on the upper lip.
Forum for Nord Derm Ven 2019, Vol. 24, No. 4
What is the diagnosis? See next page for answer.
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