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Pycnodysostosis - Contents | Cases | Comments | Bibliography

Pycnodysostosis

Case

mr1_pycno_facies.jpg (9303 bytes)

Please advise me on the management of this 56 year old male, suffering from Pycnodysostosis. He is mainly wheelchair bound, but transfers with the aid of crutches.

mr1_pycno_clin.jpg (26665 bytes)
Approximately 15 years ago he presented with a draining sinus at the MP joint of his big toe, which was treated with long-term antibiotics. This sinus started draining again about two months ago, but stopped after a few weeks on antibiotics.

mr1_picno_foot.jpg (12739 bytes)

mr1_picno_thumb.jpg (2763 bytes)

mr1_picno_thumb_clin.gif (54372 bytes)

 

Current problem: Draining sinus on pulp of thumb. This was painful just over a year ago. The skin overlying the sharpened, palpable tip of the phalanx (see attached X-ray) was sore, especially when using his crutch with that hand. It subsided slowly whist only being observed. At that time I was worried about the tip of the phalanx (which was palpable proximal to the bulk of the pulp, as the terminal tuft has resorbed). Two weeks ago he presented, with (yes, you guessed it)a sinus over the tip of this phalanx, where the skin seemed to have broken down, draining only a little (still awaiting culture results). The patient is very worried about surgery (I am thinking of a debridement with rounding off of the tip of the phalanx), as it will make him bed-bound for the duration of the recovery (which I suspect might be lengthy) as he will not be able to use his crutch
mr1_pycno_hands.jpg (9751 bytes)

mr1_pycno_thumb_clin.jpg (5899 bytes)

Follow up

This patient was previously reported in the literature (Mills KL, Johnston AW.  Pycnodysostosis. J Med Genet. 1988 Aug;25(8):550-3.)

Patient is of normal intelligence (he e-mailed me some of the images), transfers from wheelchair to bed, using crutches.
Thumb developed draining sinus over tip of terminal phalanx (sharp tip of phalanx eroded through skin due to increased pressure when taking weight on crutch). Healed with self-applied topical antibiotics (!)
Previous draining sinus over MP joint R big toe. It healed with only antibiotics. This has been quiescent for 10 years

 

Does anybody have experience with similar problems in Pycnodysostotic patients? If so, please let me have your thoughts.

Marthinus Roos
Elgin, Scotland

 

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