Infantile nephropathic cystinosis

What it is

A subtype of cystinosis characterized by an accumulation of cystine in the organs and tissues, particularly in the kidneys and eyes, and that clinically manifests from infancy with renal Fanconi syndrome, photophobia, hypothyroidism, impaired growth and rickets, in addition to various other systemic effects. Progressive extra-renal manifestations include hypothyroidism, hypogonadism and male infertility, insulin-dependent diabetes, hepatosplenomegaly with portal hypertension, muscle involvement with distal muscle weakness and atrophy, pharyngeal and oral dysfunction, swallowing difficulties, cerebral involvement with hypotonia, speech and walking difficulties, and cerebellar syndrome.

Key facts

Prevalence

1-9 / 1 000 000 (at birth, Europe)

Age of onset

Infancy

Inheritance

Autosomal recessive

Classified as

Clinical subtype

Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.

Signs and symptoms

These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.

Gene

ICD-10 codes

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references