| Type | Description | Treatment |
| 1 | Boutonniere (most common) | Synovectomy with extensor hood reconstruction; MCP fusion or arthroplasty |
| 2 | Boutonniere with CMC subluxation (uncommon; Type 1 + Type 3) | Same as type 1 and type 3 |
| 3 | Swan neck deformity (2nd most common) | Splinting vs CMC arthroplasty; MCP fusion |
| 4 | Gamekeeper deformity | Synovectomy/UCL reconstruction or Fusion |
| 5 | Swan neck with MCP disease | Fusion of MCPJ |
| 6 | Arthritis mutilans | Arthrodesis |
The genes that encode HLA (Human Leukocyte Antigen) are on chromosome 6. MHC class Type Location Function I HLA-A, -B, -C All cells Recognized by CD8+ lymphocytes II HLA-DP, -DQ, -DR Antigen presenting cells Recognized by CD4+ lymphocytes III Complement components Plasma Chemotaxis, opsonization, lysis of bacteria and cells The…
Site Point of insertion Direction Indications Olecranon (K-wire) 1.25 inches (3 cm) distal to olecranon tip – deep to subcutaneous border of upper ulna (avoids ulnar joint and open epiphysis) Medial to Lateral – At right angles to longitudinal axis of ulna (Avoids ulnar nerve) Supracondylar or Distal humerus fractures…
Mnemonic: Imagine a letter “Z“. a. McRae’s line has “R” and is at Roof. b. Chamberlain’s line starts with “C” and is at Center. c. McGregor’s line has “G” and is at Ground. a. McRae’s line (foramen magnum line): drawn from anterior margin of foramen (basion) to posterior margin of…