A lot of trees have been sacrificed in the name of better
understanding bone stress injuries to the lower limb. Brukner and Khan’s latest
edition of Clinical Sports Medicine devotes a whole chapter to their management...
in feet. Admittedly with good reason;
they are debilitating and difficult to treat.
However, at the risk of being seen to harp again on my favourite theme
of “what about the hand”, what about the hand? If B & K don’t mention them, and do they even exist?
The answer is of course yes, it’s just that they are rarer. A
Spanish paper in 2010 reported that only 12 cases of stress fractures to the
metacarpals had ever been written up. The authors of that paper then published
a case series of 7 tennis players with stress fractures of a metacarpal. All
were adolescents, and all had altered their training or some aspect of their
game prior to this injury (1). Volker Schoffl, that rock-climbing, x-gaming
hand surgeon in Germany also published a paper on bony oedema in climbers (2). Aside from that there are a few case studies, but not a lot.
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| I've got almost too much in common with this guy! |
So if they’re not talked about much, are we talking about
the same thing? Well, essentially yes. B & K devoted a chapter to this
subject; I’m going to try to paraphrase them in 150 words. Actually, I’m just
going to copy what Stuart Warden wrote because it’s nice and succinct… (3) “A bony stress injury (BSI)represents the
inability of bone to withstand repetitive mechanical loading, which results in
structural fatigue and localised bone pain and tenderness. It occurs along a
pathology continuum beginning with a stress reaction, which can progress to a
stress fracture, and ultimately a complete bone fracture”. Thank you
Stuart. Of course there is a lot more too it, and his chapter is a good read so
get into it if you want to know more.
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Should be obvious.
MRI stress #. Not my patient
(4) |
“Treatment then is what?” I hear you protocol driven fiends
out there screaming. Rest and controlled load says Stuart, among other pearls.
But let me make this a bit more personal, this is what I did...
· Tennis player, bone pain in second metacarpal,
had come on strongly over the period of a clay court tournament but had likely
been festering for some time. Essentially the pain was so severe he could no
longer hold his racquet and hit a forehand with any force. Stress reaction
confirmed on MRI, dorsal interossei inflamed also which made anatomical sense.
· -Weeks one to two, rest in hand forearm orthosis
overnight, hand based radial metacarpal joint immobilisation orthosis during
the day, coming out for gentle range, modalities and very light massage only.
Pain with turning on tap.
· -Week three initiate very light isometrics to the
interossei. Shadow racquet swings with large diameter light cardboard roll – NO
PAIN. Decreased splint use, taps almost ok. Continue overnight splinting, stop
day splint.
· -Week four introduce light grip vs theraputty,
continue to build load. Roll ball on racquet head. Grip rolled up towel.
· -Week five to six, continue to build load,
isometrics well tolerated now, introduce graded hitting ie soft balls, no
forehands just yet. Progress putty density, light gym weights.
At this point, I passed him back to the tennis physios as
the interossei were now pain free to heavy loading, although forceful grip was
uncomfortable especially when hitting, and he still had pain with palpation of
the second metacarpal. However my outcome measures had all been met, and it was
felt he needed to focus on the tennis side of things.
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| Not my patient btw. Just a funny photo. |
It is now 4 months since he last hit a tennis ball in anger,
but he has finally been given the green light to resume competition. That’s a
long time off for something that was initially seen as a short term reaction to
increased activity. The time frame does does however, fit published case studies (1,4). It’s also likely that this stress reaction was in fact a
fracture. I can absolutely guarantee that if any of the team involved with this
injury come across any similar injury that occurs in another tennis players
metacarpal will be taken just as seriously as if it had occurred in a
metatarsal. “What about the hand” indeed! All part of my cunning plan.
Look after those fingers,
Hamish
(1) Balius, R. et al. Stress fractures of the
metacarpal bones in adolescent tennis players: a case series. American Journal of Sports Medicine 2010
38:6 pp 1215-1220
(2) Hochholzer, T., Schoffl, V. Overuse bone marrow
oedema of the hands in sport climbers. Sport
Orthop Traumatol 2013 29:3 pp 219-24
(3) Warden, Stuart. “Sports Injuries:
Overuse” in Brukner, P & Khan, K. Clinical
Sports Medicine 5th ed. 2017
(4) Duarte, M. Metacarpal stress fracture in an amatuer tennis player; an uncommon fracture. Revista Brasilera de Orthopedia June 2017.