Expanding the clinical spectrum of dermal hyperneury. Report of nine new cases and review of literature (2019)

Type of publication:
Journal article

Ieremia, Eleni; Marušić, Zlatko; Mudaliar, Vivek; *Kelly, Susan; Gonzalvo Rodriguez, Pablo; McNiff, Jennifer M; LeBoit, Philip E; Calonje, Eduardo

Histopathology; Nov 2019; vol. 75 (no. 5); p. 738-745

AIMS Dermal hyperneury is defined as the hypertrophy of small nerves in the dermis. It has been described in a variety of settings. We present a series of nine new cases with distinctive clinical presentation and review the existing literature. The aim of the study is to summarise the clinical, histopathological and immunohistochemical findings in a case series of dermal hyperneury with unique clinical presentation. METHODS AND RESULTS Nine cases were identified from the referral practice of one of the authors. Clinical characteristics, including demographic details were collated. The histopathological features and novel immunohistochemical findings were analysed. Four cases presented with multiple skin lesions. Clinical evaluation revealed no associated syndromic stigmata. The histology in all cases was that of dermal hyperneury. Immunohistochemistry for phosphatase and tensin homolog (PTEN) and RET was supportive of the lack of syndromic association. CONCLUSION The presentation of dermal hyperneury with multiple cutaneous lesions and no syndromic associations is distinctive and the study with PTEN and RET immunohistochemistry is previously undescribed. Comparison to recent reports of multiple nonsyndromic mucocutaneous neuromas is discussed.

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