Current RMA Instruments
| Reasonable Hypothesis SOP | 43 of 2023 |
| Balance of Probabilities SOP | 44 of 2023 |
Changes from previous Instruments
ICD Coding
ICD-10-AM Code: Q78.6
Brief description
This is a genetic disorder of the bone manifesting in multiple benign cartilage topped bone tumours arising from the growth plates.
Confirming the diagnosis
This diagnosis is based on clinical findings and imaging of the bone with MRI [magnetic resonance imaging], CT [computerised axial tomogram], or plain x-rays. Histology may be obtained.
The relevant medical specialist is an orthopaedic surgeon.
Additional diagnoses covered by SOP
- Nil
Conditions excluded from SOP#
- Dysplasia epiphysealis hemimelica
- Enchondromatosis
- Metachondromatosis
- Ollier disease
- Single osteochondroma
- Synovial osteochondromatosis
# All non-SOP
Clinical onset
The genetic abnormality is present from birth. The osteochondromas develop before adulthood (before bone growth ceases). They are mostly asymptomatic but may cause pain, disfigurement or compression of adjacent structures. They are most frequently located in the long bones and particularly around the knee.
Clinical worsening
The only SOP factor is for inability to obtain appropriate clinical management.
Lesions cease to grow when the bone growth-plates close in early adulthood. Mangement involves observation and surgical excision for troublesome lesions. Malignant transformation to chondrosarcoma occurs rarely. This would be onset of a new condition rather than worsening of osteochondromatosis.