Figure 2: ERC1::ALK fusion sarcoma of interdigitating
hand in 15-month-old male infiltrates as blander ovoid myopericytoid
cells into adipose tissue with smaller fat cells (lipofibromatosis-like)
and skeletal muscle and has focal moderate cellularity, perivascular
whorling, similar to that described in infantile fibrosarcoma or
myopericytic tumors.