April 2015 | Case of the month - gain CPD points

History

A 27 year-old woman presented with a short history of blisters on her left index finger. The patient recalled a strange sensation in this area before the blisters appeared. The patient was otherwise well and took no medications, prescribed or over the counter. She had no pets, and had an office-based job. 


Examination

A small group of clear vesicles with erythema on the affected finger. No other sites were involved.  


Investigations

What is the diagnosis? 


Images

Diagnosis

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The diagnosis is a herpetic whitlow ie herpes simplex.

In addition to the mouth and the genitalia, herpes simplex infections can arise in other parts of the body. In such cases lesions arise as vesicles, and sometimes bullae, either grouped as a plaque or scattered. Systemic upset tends to be minimal. Some well-described sites include the fingertips (a herpetic whitlow), where episodes can be recurrent, and on the face of rugby players, which is referred to as 'scrumpox'.

This case was diagnosed by bursting a vesicle and swabbing the contents with a viral swab. 

For more information on herpes simplex infections please refer to the chapter on Herpes Simplex

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