The best replacement for hamartoma is adenoma.

The best alternatives to hamartoma are rated as following:
★★★★★  adenoma
★★★★★  neoplasm
★★★  hemangioma
★★★  choristoma
★★  benign neoplasm
★  fibroadenoma
★  benign tumor
  teratoma

Your alternative for hamartoma is not listed? Suggest!
Speaking about hamartoma, one probably shouldn't forget about seizures.

Other search terms related to hamartoma and their ratings are:
★★★★★ seizures
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