Heart and vessels Flashcards
Multiple branching fronds of paucicellular, avascular fibroelastic tissue lined by a single layer of endocardium
Papillary fibroelastoma
Plan:
Correlate with clinical/radiological features
This is a morphological diagnosis of a benign lesion - no specific further action required
Polygonal (lepidic) cells within a myxoid stroma form cords, nests, and rings around blood vessels. Hemorrhage, calcifications and lymphoid infiltrates are abundant. May show Gamna-Gandy bodies.
Cardiac myxoma
Plan:
Correlate with clinical and radiological history (?cardiac tumour ?familial syndrome)
Examine further blocks (e.g. for completeness of excision)
IPX: Not required for diagnosis
Advice to clinician: May be sporadic or assiociated with Carney complex. Clinical correlation is required.
Heart muscle with multiple non-necrotising granulomata, with foreign body giant cells. Giant cells may contain Schaumann or Asteroid bodies
Cardiac sarcoidosis
Differential diagnosis:
Giant cell myocarditis
Fungal/mycobacterial infection
Foreign body granulomas
Plan:
Correlate with clinical history (?cardiomyopathy ?systemic/pulmonary sarcoidosis)
Correlate with any concurrent microbiological testing
Special stains: GMS, PAS, ZN (to evalulate infectious aetiology)
Examine under polarised light
Inflammation of a vessel with lymphocytic and histiocytic infiltrate and giant cells which disrupt the internal elastic lamina.
Giant cell / temporal arteritis
Plan:
Correlate with clinical history / radiologic findings (?sudden onset headache ?raised ESR/CRP)
Examine deeper levels
Special stains: Elastic stain (highlight fragmentation of internal elastic lamina)
Advice to clinician (urgent via phone) - potentially vision threatening diagnosis, patient required urgent corticosteroid treatment
Cardiac muscle with coagulative necrosis (loss of nuclear detail), contraction bands (thick eosinophilic bands in myocytes), inflammatory infiltrate
Myocardial infarction
Plan:
Correlate with clinical history / radiologic findings (?chest pain/sudden cardiac death ?troponin rise ?ECG / angiogram)
Examine further sections (to evaluate extent of infarction, complications such as thrombus, aneurysm)