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Table 1 Number of HPO in each category (leaf nodes)

From: Examining HPO by organ and system to facilitate practical use by clinicians

categories within Phenotypic Abnormality

N

Abnormality of the genitourinary system

1039

Abnormal cellular phenotyp

191

Abnormality of blood and blood-forming tissues

570

Abnormality of head and neck

961

Abnormality of limbs

1688

Abnormality of metabolism/homeostasis

1219

Abnormality of prenatal development or birth

192

Abnormality of the breast

24

Abnormality of the cardiovascular system

957

Abnormality of the digestive system

496

Abnormality of the ear

213

Abnormality of the endocrine system

273

Abnormality of the eye

777

Abnormality of the immune system

871

Abnormality of the integument

713

Abnormality of the muscleskeletal system

2743

Abnormality of the nervous system

1586

Abnormality of the respiratory system

445

Abnormality of the thoracic cavity

4

Abnormality of the voice

21

Constitutional symptom

81

Growth abnormality

68

Neoplasm

435