Radiographic Evaluation of Olecranon Apophyseal Ossification System Guide
Olecranon Apophyseal
Ossification System
Guide for Radiographic Evaluation
Overview
•
Stage 0
–
no apophyseal ossification
•
Stage 1
–
one
small
,
circular/oval
ossification
•
Stage 2
–
one
larger
,
oblong
ossification
•
Stage 3
–
two ossifications that
do not overlap
•
Stage 4
–
two ossifications that
overlap
•
Stage 5
–
one fused ossification that is
rectangular proximally
•
Stage 6
–
one fused ossification that is
pointed/rounded proximally
•
Stage 6.5
–
one fused ossification that is
partially fused
to the volar ulna
metaphysis
•
Stage 7
–
completely fused
ossification
Stage 0
•
No ossification of
olecranon apophysis
Stage 1
•
One, small circle/oval
ossification
vs Stage 2
•
Oblong/longer ossification
Stage 2
Stage 1
Stage 2
•
Relatively large
ossification
•
Variable shape
(noncircular)
vs Stage 5
•
rectangular top at level of
olecranon articular surface
Stage 2
Stage 3
•
Two ossifications that
do not overlap/touch
at any point
vs Stage 4
•
Two ossifications that
overlap/touch
Stage 3
Stage 4
Stage 4
•
Two ossifications
that overlap/touch
at any point
vs Stage 6
•
smooth single apophyseal
piece
Stage 4
Stage 6
Stage 5
•
Rectangular top at level
of olecranon articular
surface
vs Stage 6
•
Rounded/peaked tip
posterior-proximally
Stage 5
Stage 6
Stage 6
•
Rounded/peaked
apophyseal tip
•
No evidence of fusion with
metaphysis
–
Able to visualize entire
apophyseal line
vs Stage 6.5
•
partial fusion with metaphysis
Stage 6
Stage 6.5
Stage 6.5
•
Partial fusion
–
Small radiolucency
between epiphysis
and metaphysis
posteriorly
vs Stage 7
•
Complete fusion
Stage 7
Stage 6.5
Stage 7
•
Smooth
posterior ulna
•
Complete fusion
–
Physeal scar may
be present
Comprehensive radiographic evaluation guide for the olecranon apophyseal ossification system, detailing stages from no ossification to complete fusion. Provides visual references and descriptions for each stage to aid in interpretation.
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Presentation Transcript
Olecranon Apophyseal Ossification System Guide for Radiographic Evaluation
Overview Stage 0 no apophyseal ossification Stage 1 one small, circular/oval ossification Stage 2 one larger, oblong ossification Stage 3 two ossifications that do not overlap Stage 4 two ossifications that overlap Stage 5 one fused ossification that is rectangular proximally Stage 6 one fused ossification that is pointed/rounded proximally Stage 6.5 one fused ossification that is partially fused to the volar ulna metaphysis Stage 7 completely fused ossification
Stage 0 No ossification of olecranon apophysis
Stage 1 Stage 1 One, small circle/oval ossification vs Stage 2 Oblong/longer ossification Stage 2
Stage 2 Stage 2 Relatively large ossification Variable shape (noncircular) vs Stage 5 rectangular top at level of olecranon articular surface Stage 5
Stage 3 Stage 3 Two ossifications that do not overlap/touch at any point vs Stage 4 Two ossifications that overlap/touch Stage 4
Stage 4 Stage 4 Two ossifications that overlap/touch at any point vs Stage 6 smooth single apophyseal piece Stage 6
Stage 5 Stage 5 Rectangular top at level of olecranon articular surface vs Stage 6 Rounded/peaked tip posterior-proximally Stage 6
Stage 6 Stage 6 Rounded/peaked apophyseal tip No evidence of fusion with metaphysis Able to visualize entire apophyseal line vs Stage 6.5 partial fusion with metaphysis Stage 6.5
Stage 6.5 Stage 6.5 Partial fusion Small radiolucency between epiphysis and metaphysis posteriorly vs Stage 7 Complete fusion Stage 7
Stage 7 Smooth posterior ulna Complete fusion Physeal scar may be present
