Gingival biopsy is useful in the diagnosis of-
Harshmohan textbook of pathology 7th edition. In systemic amyloidosis renal biopsy provides the best detection rate but rectal biopsy also has a good pickup rate. However gingiva and skin biopsy have poor result. .
Sarcoidosis
Amyloidosis
Histoplasmosis
Scurvy
General pathology