Subungual corn: a tender pigmented subungual lesion in older people

de Berker, D.A., Wlodek, C. and Bristow, I.R. (2014) Subungual corn: a tender pigmented subungual lesion in older people. British Journal of Dermatology, 171 (1), 69-72. (doi:10.1111/bjd.12858). (PMID:24484293)

Abstract

Background
Heloma durum occurs as a tender mass in the distal nail bed beneath the big toenail in older women.

Objectives
To define and report a variant of heloma durum not referenced in the literature.

Methods
This was a retrospective study whereby records, including photographs, of all cases of subungual corn were reviewed. All patients were seen in an outpatient setting.

Results
The records of 16 patients [15 women, one man, mean age 68 years (range 49–87)] were examined; history was between 6 and 30 months, none of the patients had received effective treatment. Mycology was negative. All reported discomfort under the big toe nail; 12 had associated subungual haemorrhage. The right big toenail was involved in 10 of 16 patients. Shared clinical features were of a subungual focus of hyperkeratosis (100%) with haemorrhage admixed in 75% of cases. The lesion was in the midline third of the nail in 11 of 16 patients (69%). The affected distal margin of nail was the uppermost point in the lateral profile of the toe (100%). Hyperextension at the distal interphalangeal joint of the affected toe was demonstrated with the patient standing. Local excision was performed when diagnosis was unclear (eight patients); simple clearance of the keratin plug was performed in the other eight patients. There was no relapse in patients who were followed up for > 6 months (n = 7).

Conclusions
Clinical explanation and paring down should be attempted in order to avoid surgery at this poor healing site in the elderly.

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