[1] He is best known for his contribution in setting the standards of diagnosis and treatment of breast and thyroid disease praised by the United States Congress in 1994.

Following a short period of practice in internal medicine and cardiology, he emigrated to the USA to complete a training in pathology at Temple University in Philadelphia and at the Memorial Sloan Kettering Cancer Center and St. Vincent's Hospital in Manhattan, New York City.

Sanchez has practiced at Englewood Hospital and Medical Center since 1975, as its chief of pathology since 1991, and a member of its board of trusteesfrom 1985 to 2014.

[18] The most notable of his distinctions are the first Yolanda Oertel Interventional Pathologist of the Year in 2003; the gold medal of the Chinese Academy of Medical Science for his contributions in the first course on AIDS in Beijing.

The President of Nicaragua granted him the Medal of Medical Merit and the College of American Pathologists honored him with the 2010 Excellence in Education Award.