Certain genetic syndromes, like Down Syndrome, have the same effect. Other differential diagnoses include rickets, osteomalacia, and other rare skeletal syndromes. Prognosis varies depending on the type of callosal abnormality and associated conditions or syndromes. Some mutations in genes associated with renal dysplasia (in syndromes) have been determined. Ehlers Danlos syndromes (EDS) may also have similar symptoms. Pituitary apoplexy is one of the few acute chiasmal syndromes. Thus, prognosis for paraneoplastic syndromes may vary greatly. They are usually associated with nephritic syndromes or urinary tract injury. Some of these craniofacial syndromes are genetic, others are from unknown causes. Scoliosis associated with known syndromes is often subclassified as "syndromic scoliosis". The cause of these hemorrhagic chickenpox syndromes is not known. A specific prognosis for those with paraneoplastic syndromes links to each unique case presented. Each of the five classical lacunar syndromes has a relatively distinct symptom complex. Primary headache syndromes have many different possible treatments. The atypical parkinsonian syndromes include DLB, along with other conditions.