各位老师新年好，顺便请教

Acromegaly is often confused with pachydermoperiostosis or primary hypertropic osteoarthropathy, which is a rare hereditary disorder. Acromegaloidism also closely resembles pachydermoperiostosis, which however has no demonstrable causative  factors  such  as pulmonary, cardiac or hepatic disorders.

which 指代的是 Acromegaloidism还是pachydermoperiostosis？

pachydermoperiostosis是可以继发于ulmonary, cardiac or hepatic disorders的。