Laceration over dorsal aspect of MCP joint (most commonly third, fourth, and/or fifth MCP joints)
Many patients present 5-7 days after injury with healing wound, pain/swelling, erythema, limited ROM
May also have systemic symptoms such as fever, lymphadenopathy, etc.
May also have systemic symptoms such as fever, lymphadenopathy, etc.
Closed fist infection
Hand and finger fractures
Exotic pet infections
Bed bugs
Hand deep space infection
Closed fist infection 
Mammalian bites
Digital Mixoid Cyst 