De Novo Interstitial Deletion of Chromosome 2 (p23p24)

Structural anomalies associated with partial 2p monosomy are rare. There has only been one case of interstitial deletion of 2p24.2–2p25.1 and three cases of 2p23.3–2p25.1 described in the literature. We report here the first instance of an interstitial deletion of 2p23p24, confirmed by comparative genome hybridization. We present a clinical and cytogenetic report of a patient with psychomotor retardation, hearing impairment, and limb abnormalities. The obvious osseous fusion with bone marrow and cortex continuation between proximal parts of radius and ulna—congenital radioulnar synostosis—were first visualized by multidetector-row computed tomography scan.