A patient presents with recurrent kidney stones. The microscopic examination of the urine specimen is shown below. Which of the following is not seen in the urine of this patient?: (A) cysteine, (B) lysine, (C) Arginine, (D) cystine
Answer is A. COMPOSITION SHAPE OF THE STONE Calcium oxalate monohydrate Dumbell shape Calcium oxalate dihydrate Envelope Clcium phosphate Flat shaped prisms Struvite coffin-lid Uric acid Rhomboid Cystine Hexagonal Reference: Harpers illustrated biochemistry 30th edition