Joint signs are variably expressed .
Joint signs are variably can lead to transient swelling without sequelae between crises , or to unpredictable anomalies of growth cartilage and long bones epiphyses suggestive of a pseudo-tumour .
Joint signs are variably expressed and can lead to transient swelling without sequelae between crises , or to unpredictable anomalies of growth cartilage and long bones epiphyses suggestive of a pseudo-tumour .