Table 1

Seven cases of low-grade ESOS reported in literature.

Ref.

Sex/Age

Initial diagnosis

Tumour location

Largest diameter

Treatment

Clinical outcome


[10]

M/44

Myositis ossificans

Right thigh

5 cm

S

Lung metastases, 4 years, death

[11]

F/57

Low-grade ESOS

Right popliteal fossa

24 cm

S

Disease-free,

5 years

[12]

F/74

Parosteal OS

Left axilla

14 cm

S

Disease-free,

2 years

[13]

F/35

Myositis ossificans

Left leg

11 cm

S

Disease-free,

4 years

[14]

F/40

Parosteal OS

Back, para-spinal

9 cm

S

Lost to follow-up,

2 months

[14]

M/32

Low-grade ESOS

Right thigh

and others

16 cm

S + CT

Lung and retroperitoneum metastases, 4 years, death

Our case

M/30

Myositis ossificans

Chest

30 cm

CT

Loco-regional extension,

death 5 years after first symptoms and 1 year after diagnosis


M, male; F, female; ESOS, extraskeletal osteosarcoma; OS, osteosarcoma; S, surgery; CT, chemotherapy

Sabatier et al. BMC Cancer 2010 10:645   doi:10.1186/1471-2407-10-645

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