Table 1—

Antibody findings

AntibodyCase 1Case2
CD68+ (macrophages)+
SMA+ (spindle cells)+
ALK1
Vimentin++
Cytokeratin
CD34
S100
EMA−/+
SSTR2A++
SSTR3++ (few cells)
SSTR5++ (few cells)
  • CD: cluster of differentiation; SMA: smooth muscle actin; ALK1: activin receptor-like kinase 1; EMA: epithelial membrane antigen; SSTR: somatostatin receptor.