Immune checkpoint inhibitor-induced myopericarditis.

A woman in her 30s with a medical history of metastatic rectal adenocarcinoma, currently on pembrolizumab, which started a few weeks ago, was admitted for abdominal pain. During the hospital stay, she experienced sharp chest pain. Troponin was 1885 ng/mL which peaked at 7338 ng/mL. ECG was unremarkable. The echocardiogram showed an Ejection fraction (EF) of 55%-60% and basal-inferior wall hypokinesis. Left heart catheterisation showed no coronary abnormalities. Cardiac MRI showed a non-coronary area of focal T1 and T2 hyperintense signal and transmural delayed gadolinium enhancement in the mid-basal inferior/inferoseptal wall consistent with myocardial damage. Pericardium showed increased thickness and adhesions at the right ventricular outflow tract consistent with pericarditis. Steroid therapy was initiated, and a marked clinical response was achieved. Immune checkpoint inhibitor-induced myocarditis and pericarditis is a rare complication associated with a high mortality rate, if untreated. Diagnosis requires a multidisciplinary approach, and early detection is critical to preventing a fatal outcome.

Carcinoid heart disease: a potentially fatal complication of carcinoid syndrome.

Carcinoid heart disease is a unique and serious cardiac complication of the neuroendocrine tumour that affects the right side of the heart, especially the tricuspid and pulmonic valves, eventually causing right heart failure. We present a middle-aged man with a history of well-differentiated neuroendocrine tumours of the small intestine with extensive metastases to the liver, mesentery and spine who is receiving monthly octreotide therapy. He presented with generalised fatigue, severe ascites and worsening dyspnoea. Both the transthoracic echocardiography and transoesophageal echocardiography revealed severe tricuspid and pulmonic regurgitations. He was considered a poor surgical candidate, underwent transcatheter pulmonic valve replacement with two bioprosthetic valve-in-valve implantations and was discharged in a stable condition.