<unk>  is a result of the lower ribs coming in contact with the iliac crest due to a reduced costoiliac distance. There are several conditions in which may cause<unk>  to occur both unilaterally or bilaterally. 259x259px Unilateral causes Scoliosis has been known to cause unilateral<unk> . It is a condition in which the lateral curvature of the spine is measured to be more than 10 degrees. Scoliosis is typically categorized into congenital, neuromuscular, idiopathic, degenerative, and pathologic forms. The decreased distance between the ribcage and the iliac crest can come in contact depending on the severity of the scoliosis curve. There has also been reported instances where individuals experience<unk>  due to an abnormally long twelfth rib. This can be presented both bilaterally or unilaterally, depending on the individual. Bilateral causes<unk>  most commonly occurs bilaterally as a result of spinal osteoporosis. Osteoporosis is a condition in which the bone density and quality deteriorates, resulting in an increased risk for fractures. More than 2 million fractures occur anally in the United States due to osteoporosis. The most common fractures that occur due to osteoporosis is in the hip or vertebrae, resulting in a loss of space between the ribs and the iliac crest. It is estimated that osteoporosis can cause 25% of females over 50 years of age within the United States to have at least one vertebral fracture in their lifetime. Factors that make an individual more at risk for experiencing a fracture includes age, sex, weight, height, family history, rheumatoid arthritis, previous fracture, secondary osteoporosis, alcohol or smoking use, glucocorticoid use, and the femoral neck bone mineral density of the individual. 244x244px Another cause for bilateral<unk>  contact is based on the kyphosis curve of the spine. The thoracic spine is slightly curved due to the shape of the vertebral bodies and intervertebral discs, with a normal Cobb angle measurement between 20 to 40 degrees. Hyperkyphosis is a condition in which the curve of the kyphosis angle measures over 50 degrees. The kyphosis angle can be influenced by age, muscle tone, vertebral fractures, and intervertebral degenerative disc disease. Hyperkyphosis can result from posture, a congenital deformity, heritable conditions such as Scheuermann's disease, tumours, trauma, neuro-muscular disease, postlaminectomy syndrome, dwarfism, and infections such as tuberculosis which can result in Pott's disease. The curvature of hyperkyphosis may result in a decrease of space between the ribs and the iliac crest, causing<unk> .
Iliocostal friction syndrome
Slipping rib syndrome
Facet syndrome
Twelfth rib syndrome
Milwaukee shoulder syndrome
Iliotibial band syndrome
Snapping scapula syndrome
Back strain