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Table 3 Summarized data about PT21 cases mapped in this work

From: Partial trisomy 21 with or without highly restricted Down syndrome critical region (HR-DSCR): report of two new cases and reanalysis of the genotype–phenotype association

Case

Diagnosis

Sex

Age

Karyotype

Coordinates (GRCH38)

Method

Country

Reference

1

DS

F

0–2 yrs

46,XX,idic (21)(q22.3)

21q11.2q22.3 (14,145,727-43,860,444) × 3, 21q22.3 (43,927,315-46,670,405) × 1

FISH

aCGH

Italy

This work

2

Non-DS

F

0–9 yrs

46,XX,Der(20)t(20;21) (p13-;q22.3+)

20p13 (87,137 2,197,493 × 1, 2,210,152 × 2), 21q22.2q22.3 (39,486,350 × 2, 39,502,312-46,670,405 × 3)

FISH

aCGH

Italy

This work

3

DS

F

1 mos

46,XX,idic(21)(p11.2->q22.3::q22.3->p11.2)

21p11.2q22.3 (10,810,857-45,448,165) × 3

21q22.3 (45,471,378-46,664,244) × 1

Banding

FISH

aCGH

Pennsylvania (US)

[19]

4

Non-DS

M

6 mos

46,XY

21q22.3 (46,062,296-46,623,792)3

aCGH

Taiwan

[20]

  1. Cases 1 and 2 are first described here and cases 3 and 4 are retrieved from the biomedical literature
  2. M, male; F, female; FISH, fluorescence in situ hybridization; aCGH, array-CGH