[Physiopathology of smell].
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Biomedical subjects
Publications and source records attributed to C Perrin.
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Onychomatricoma is a rare tumour of the nail matrix with peculiar clinical and histological features and electron microscopic findings. We report on 5 cases with appearances which were misleading. Three presented as longitudinal melanonychia, a previously unreported observation. One case had the appearance of a cutaneous horn. In 3 of the 5 cases the tumour was associated with an onychomycosis and this may thus have been a predisposing factor in the secondary fungal infestation. Onychomatricoma appears as a multi-faceted tumour which can be mimicked by longitudinal melanonychia and/or onychomycosis.
In two patients with laryngeal von Recklinghausen disease, CT demonstrated hypodense, well-defined, septated masses sparing the epiglottis, and with little enhancement after contrast medium injection. Additional cervical lesions, benign or occasionally malignant, may also be seen.