Renal hypoplasia

Renal hypoplasia is a developmental anomaly in which one or both kidneys (unilateral or bilateral renal hypoplasia, respectively (see these terms)) have a deficit in the number of nephrons and may be small. Oligomeganephronia (see this term) represents a severe variant of hypoplasia in which nephron number is reduced by 80% and nephrons are markedly hypertrophied.

Triphalangeal thumb

A thumb with three phalanges in a single, proximo-distal axis. Thus, this term applies if the thumb has an accessory phalanx, leading to a digit like appearance of the thumb.

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PMID (PMCID)
10654325	MALE
	Townes-Brocks syndrome and renal dysplasia: a novel mutation in the SALL1 gene.
	Salerno A, Kohlhase J, Kaplan BS. Pediatr Nephrol. 2000;14(1):25-8.
	Features were imperforate anus, rectoperineal fistula, triphalangeal thumb, bifid thumb, rocker bottom feet, bilateral ear tags, satyr ear, sensorineural hearing loss, hypospadias, bilateral renal hypoplasia, and progressive chronic renal failure.