Appearance: Ammonium biurate crystals are yellowish-brown and can be seen in a “thorn apple” shape (round with thorny projections) or in spherical form. Chemical ...

Ammonium biurate crystals are normal in urine. Appearance: yellowish-brown, can be seen in a “thorn apple” shape (round with thorny projections) or in spherical form. Ammonium ...