Rare diseases · Sign or symptom

Triangular epiphysis

Triangular end part of bone

HP:0010587

What it means

Longitudinal epiphyseal bracket or bracket epiphysis is an uncommon disorder of growth. Alternatively known as a delta phalanx, it is due to an anomalous secondary ossification center that extends longitudinally along the diaphysis. Although rare, longitudinal epiphyseal bracket most commonly manifests in the hands as clinodactyly and in the feet as hallux varus.

Part of the broader category

Abnormal epiphysis morphology

Also called: Longitudinal epiphyseal bracket · Triangular epiphyses

Triangular epiphysis

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This page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.