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. 2011 Aug 12;5(3):196–200. doi: 10.4184/asj.2011.5.3.196

Fig. 6.

Fig. 6

Intra-operative findings: a solid brownish mass surrounding by a thin facet capsule around the right L4-L5 facet joint. Puncture of the mass revealed old coagulated dark-brown blood, but no malignant cells were found on histological examination.