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Table 1 Clinical findings in the proband IV-1 and her mother III-3

From: A novel frameshift variant leads to familial osteopetrosis with variable phenotypes in a Chinese Han consanguineous family

General information

IV-1

III-3

Gender

female

female

Onset age

3y

40y

Age at admission

3y

-

Death (age)

30y

55y

Clinical features

IV-1

III-3

Developmental delay

short stature; mental retardation

No

Hearing loss

Yes

No

Facial abnormality

exophthalmos; temporal-facial fistula and abscess

No

Visual impairment

Yes

No

Palate cleft

Yes

No

Dental problem

agomphiasis; irregular teeth alignment

No

Osteomyelitis

Yes

No

Skeletal symptom

bone fracture

inger skeletal deformity

Splenomegaly

Yes

Yes

Imaging findings

IV-1

III-3

Chest X-ray

increased bone density; scoliosis; “sandwich” appearance of vertebrae

NA

Long-Bone X-ray

increased bone density; fracture of right upper arm; Erlenmeyer flask deformity of tibia and fibula

NA

Hand X-ray

fracture of proximal phalanx of left middle finger

NA

Cranial CT

skull thickening, palate cleft, agomphiasis, irregular teeth alignment; poor sinus gasification; the hammer-anvil joint fixation; tympanosclerosis; bone sclerosis of the maxilla and mastoid

intracranial hemorrhage

Laboratory test

IV-1

III-3

pre-operation

post-operation

RBC (3.8–5.1 × 1012/L)

3.0

3.9

3.5

WBC (3.5–9.5 × 109/L)

2.9

10.2

2.5

PLT (125–350 × 109/L)

30

110

20

Hb (115–150 g/L)

59

101

71

Bone marrow aspiration

NA

bone marrow failure

  1. RBC, Red blood cell; WBC, White blood cell; PLT, Platelets; Hb, Hemoglobin; NA, Not available