Pathology

Collagen vascular disease (SLE, SSc, others) Arterial occlusive disease. Pulmonary HTN. Neurologic disorders. Blood dyscrasias (e.g. Waldenstrom’s) Trauma. Other: thoracic outlet syndrome (decreased blood flow, short rib) Arthritis Ddx by category. Acute polyarthritis. Infectious: bacterial sepsis, Neisseria, HIV, other virus, Lyme, rheumatic ... ................
................