Many jobs that require frequent shoulder movement such as lifting and overhead movements also contribute. In older populations impairment of blood supply can also be an issue. With age, circulation to the rotator cuff tendons decreases, impairing natural ability to repair, increasing risk for tear. Another potential contributing cause is impingement syndrome, the most common non-sports related injury and which occurs when the tendons of the rotator cuff muscles become irritated and inflamed while passing through the subacromial space beneath the acromion. This relatively small space becomes even smaller when the arm is raised in a forward or upward position. Repetitive impingement can inflame the tendons and bursa, resulting in the syndrome. Extrinsic factors
Well-documented anatomic factors include the morphologic characteristics of the acromion, a bony projection from the scapula that curves over the shoulder joint. Hooked, curved, and laterally sloping acromia are strongly associated with cuff tears and may cause damage through direct traction on the tendon. Conversely, flat acromia may have an insignificant involvement in cuff disease and consequently may be best treated conservatively. The development of these different acromial shapes is likely both genetic and acquired. In the latter case, there can be a progression from flat to curved or hooked with increasing age. Repetitive mechanical activities such as sports and exercise may contribute to flattening and hooking of the acromion. Cricket bowling, swimming, tennis, baseball, and kayaking are often implicated.
Lipoatrophic diabetes is a type of diabetes mellitus presenting with severe lipodystrophy in addition to the traditional signs of diabetes. See also
Familial partial lipodystrophy
Congenital generalized lipodystrophy

External links

Iglesias P, Alvarez Fidalgo P, Codoceo R, Díez J (2004). "Lipoatrophic diabetes in an elderly woman: clinical course and serum adipocytokine concentrations". Endocr J. 51 (3): 279–86. doi:10.1507/endocrj.51.279. PMID 15256772. Morse A, Whitaker M (2000). "Successful pregnancy in a woman with lipoatrophic diabetes mellitus. A case report". J Reprod Med. 45 (10): 850–2. PMID 11077638. Meyer L, Hadjadj S, Guerci B, Delbachian I, Ziegler O, Drouin P (1998). "Lipoatrophic diabetes mellitus treated by continuous subcutaneous insulin infusion". Diabetes Metab. 24 (6): 544–6. PMID 9932222.