Riassunto
Sintomi suggestivi di sofferenza muscolare (rigidità, crampi, facile stancabilità) sono riferiti da gran parte dei pazienti affetti da ipotiroidismo franco. Talvolta la sintomatologia muscolare domina il quadro clinico o addirittura può presentarsi quale unica manifestazione di esordio dell’ipotiroidismo, per cui la diagnosi differenziale con altre cause di miopatia diventa difficoltosa. La patogenesi della miopatia ipotiroidea non è del tutto nota anche se è verosimile che i suoi meccanismi siano: alterato metabolismo glicogenolitico e ossidativo, alterata espressione di proteine contrattili, danno neuro-mediato. Studi di correlazione aplotipica, di espressione genica muscolare e di caratterizzazione proteica, potrebbero aiutare la comprensione dei meccanismi fisiopatologici di questa, spesso sottostimata, presentazione miopatica dell’ipotiroidismo. Il riscontro di elevati valori sierici di creatinfosfochinasi è sicuramente suggestivo di una compromissione muscolare, senza perb specificarne l’eziologia. Oltre a tale non specificità, l’ipercreatinchinasemia non correla con la gravita della sintomatologia miopatica. Manifestazioni muscolari rare, associate all’ipotiroidismo, sono la rabdomiolisi, la sindrome compartimentale acuta, e le sindromi di Hoffman e di Kocher-Debrè-Semelaigne.
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Rodolico, C., Pappalardo, M.A., Portaro, S. et al. La miopatia ipotiroidea. L’Endocrinologo 12, 281–287 (2011). https://doi.org/10.1007/BF03344855
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DOI: https://doi.org/10.1007/BF03344855