Pembrolizumab-induced hypothyreosis and subcutaneous bleeding

Česká verzia

Authors: Pavel Polák ^1,3,4; Jana Špeldová ²; Monika Bratová ²; Jiřina Zavřelová ^1,3; Miroslav Penka ¹
Authors place of work: Oddělení klinické hematologie, Fakultní nemocnice Brno ¹; Klinika nemocí plicních a tuberkulózy, Fakultní nemocnice Brno ²; Katedra laboratorních metod, Lékařská fakulta Masarykovy univerzity Brno ³; Interní hematologická a onkologická klinika, Fakultní nemocnice Brno ⁴
Published in the journal: Vnitř Lék 2021; 67(3): 175-179
Category: Case reports

Summary

Pembrolizumab belongs to so called immune checkpoint inhibitors. Frequent adverse event of this therapy is hypothyroidism. The authors present a case report of patient treated with pembrolizumab for non-small cell lung carcinoma, in whom severe hypothyroidism followed quite rapidly after transient phase of subclinical hyperthyroidism – at this time point new and spontaneous onset of large subcutaneous hematomas was observed. Acquired von Willebrand syndrome, acquired hemophilia A, dysfibrinogenemia, activation of fibrinolysis and thrombocytopathy were all actively ruled out in hematological differential diagnosis. Concomittantly, laboratory markers of secondary autoimmune disease and myositis were excluded. Despite continuous pembrolizumab treatment, there were no other bleeding complications seen after intensification of endocrine substitution therapy with thyroid hormones. Causal relationship between subcutaneous hematomas and severe drug-induced hypothyroidism is established per exclusionem.

Keywords:

hematomas – Hypothyroidism – pembrolizumab

Zdroje

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