Kieran Kusel

Metacarpophalangeal (MCP) joints are condyloid synovial joints between the metacarpal bones and proximal phalanges of the hands. This article is focused on the metacarpophalangeal joints of the fingers. Articulation Each joint occurs between the round head of the metacarpal and the shallow base of the proximal phalanx 1,2.

Position Paper Katherine Creeper, orcid.org/0000-0001-9591-884X Department of Haematology, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia Search for more papers by this author Bradley Augustson, Corresponding Author bradley.augustson@health.wa.gov.au Department of Haematology, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia Correspondence Dr Bradley Augustson, Department of Haematology, Sir Charles Gairdner Hospital, Nedlands 6009, WA, Australia.

Case report A 15-year-old male of Asian descent was referred with left forearm and hand weakness as well as associated muscle wasting. Weakness had been present for approximately one year and there was no recalled precipitating trauma or event. His ability to perform fine motor activities had become limited. He had no other significant past medical history. There was no personal or family history of any neurological disorders.