“…The liver, spleen and lymph nodes are the usual sites of extramedullary haematopoiesis, which can also occur in the adrenals, kidneys, gastrointestinal tract, testis, spinal cord and thorax. Despite the extensive loss of marrow cavity associated with osteopetrosis, extramedullary haematopoiesis appears to be an uncommon complication of this condition 2,4 , 8,9 .…”