病变早期为小结节状，晚期形成侵蚀性溃疡，病程缓慢，很少转移。
Its shape changes from small nodule in the early stage to erosive ulcer in the later.
病程多不相同，常呈缓慢进行性且没有早发型亚历山大病严重。
The course is variable, usually slowly progressive and less severe than the AD forms with earlier onset.
肺部良性肿瘤一般不呈现临床症状，生长缓慢，病程长。
Pulmonary benign tumor generally does not show clinical symptoms, slow growth, long course.
慢性肾衰竭(CRF)起病隐袭，进展缓慢，病程较长。
Chronic Renal Failure (CRF) during the onset hidden, slow progress, and the longer course.
[[拳师犬]]-通常发生于2月龄，病程发展缓慢。
Boxer - usually occurs at around two months of age as a slowly progressive disease.
骨关节炎病程发展缓慢，主要侵犯有滑膜组成的关节病变。
The course of osteoarthritis is slow, there are some major violations of the synovial joint disease.
骨关节炎病程发展缓慢，主要侵犯有滑膜组成的关节病变。
The course of osteoarthritis is slow, there are some major violations of the synovial joint disease.
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