There is an uncommon medical word with similar spelling, but I can't imagine
how it is related:

"Mesenchymal hamartoma is an uncommon benign lesion arising from the mesenchyme of
the portal tract. It consists of a mixture of mesenchymal tissue and bile ducts and is
considered a developmental anomaly rather than a true neoplasm [1]. It commonly
presents as a painless abdominal mass before the age of two years. Because
mesenchymal hamartoma is a benign lesion with excellent prognosis, distinguishing it
from other liver masses is important. "