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Updated: Mar 22, 2026

Spectral Karyotyping to Study Chromosome Abnormalities in Humans and Mice with Polycystic Kidney Disease
Published on: February 3, 2012
Coccygeal polypoid eccrine nevus associated with imperforate anus and unilateral multicystic kidney dysplasia
Eric Frouin1, Benjamin Riviere2, Olivier Maillet3
1Department of Pathology, CHU Poitiers, Poitiers, France.
Abstract:
Eccrine nevi are rare hamartomas characterized by an increase in the number or size of eccrine glands. A polypoid form located in the coccygeal area has been described in a few cases and termed coccygeal polypoid eccrine nevus (CPEN). No association with internal malformations was reported in any of these cases. We describe herein a case of CPEN associated with imperforate anus and unilateral multicystic kidney dysplasia. We review the clinical and pathological characteristics of CPENs and discuss the differential diagnoses.
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