Document nkMeQ97eZ0eXdm6Mjawyv9kNR

Common External Marks of Occupation or Occupational Diseases or Other Diseases (continued) Mark or sign " Probable cause Significance Comment Extremities Apart from Skin, continued Bursitis (excess fluid around joints). Clubbed fingers. Joint enlargement (arthritis). Varicose veins. Flat feet (pes plenus). Saber shins. Wrist drop (wrist weakness). Tremors. Friction, pressure, or infection. Congenital, or may be related to heart disease. ' Usually infection and gout. Hydrostatic pressure, infection among others. May be congenital; may result from weight bearing; may be related to degeneration of senil ity. Congenital syphilis. Metal poisoning, usually lead or arsenic. Alcohol. Different causes for different types. Bursae are potential spaces in connective tissue around joints that grow in response to func tional demand. R. M. 1. Various occupations lead to some bulbing of finger ends from hy pertrophy; cause of the rela tionship to silicosis and heart disease obscure. Bony enlargement. frequently called rheumatism, usually in error; ordinarily represents re action of infection or infection products. May appear anywhere, but most common in lower extremities; little related to work as a cause. A well-known common affection important to industry but little caused by it. Many varieties constitute occu pational diseases, as in "beat elbow" in miners. Many other variations in shape . of fingers. Toes may be clubbed. Some occupational diseases, such as lead poisoning, infrequently lead to bone and joint enlarge ment. Frequently associated with in dolent ulcers. May be influenced for good ot bad respectively by good or poor footwear. Forward bending and thickening of middle third of tibia. A frequent feature of lead poison ing; its counterpart is ankle drop; seen in lead poisoning when leg muscles are much used. R. M. I. Many types involving many por tions of the body from fingers to tongue. May be related to various diseases and states, including fear, goiter, ParkinBon's disease, lead poisoning, etc. R. M. I. Knobby shin bones in absence of saber deformity also suggests syphilis. Many other muscle groups simi larly may be weak in metal poisoning, and chiefly in lead poisoning. Some tremors cease on the ac complishment of an intention; thus a marked tremor may exist in reaching for a book and cease when the book is picked . up. CAREY P. M C CORD o