PMC4563087_01
Radiological evaluation of supraspinatus muscle and tendon. MRA showed a calcified mass, as well as a supraspinatus tendon thinning (a). Preoperative CT was performed for a better definition of the volume of the well-delimited calcified mass into supraspinatus muscle (b). Five years ago, a supraspinatus muscle MRI excluded intramuscular mass on this time (c).
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fig1
MRI showed a thinned supraspinatus tendon (Figure 1(a)). A complementary CT scan showed a well-delimited voluminous supraspinatus muscle calcification (Figure 1(b)), as well as an infra-acromial spur. Five years ago, a prior MRI excluded any supraspinatus muscle mass (Figure 1(c)).
In situ, macroscopic, and histologic aspects of calcified mass. In situ (a) and postextraction (b) macroscopic aspects of calcified mass showed a 7 x 4 x 4 cm well-delimited whitish solid tumor. Histologic evaluation ((c) and (d)) showed a highly hyalinized collagenous scar tissue devoid of any inflammatory cells, with some dystrophic calcifications at the periphery of the lesion (d).
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fig2
First, tension on supraspinatus tendon was reduced by extracting calcific mass (Figure 2(a)). Macroscopically, the lesion was a well-defined 7 x 4 x 4 cm whitish fusiform lesion (Figure 2(b)). A Congo-red coloration has been performed to exclude an amyloidoma that was negative (Figures 2(c) and 2(d)).
PMC4563087_02
Supraspinatus muscle six months after surgery radiologic evaluation. MRA showed a good healing of the supraspinatus muscle. However, a Goutallier stage 2 fatty infiltration remains.
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fig3
MRA showed a supraspinatus muscle with Goutallier stage 2 fatty infiltration, as well as the absence of "fish backbone sign" or recurrence of calcified mass (Figure 3).