Photomicrographs showing urine sediment of a patient with indinavir sulfate crystalluria

Light microscopic photographs of a fresh unstained preparation of urinary sediment showing three different forms of indinavir sulfate crystals.
(A) Rectangular plates of various sizes containing needle-shaped crystals. The plates have irregular borders with occasional tapering, and internal layering evident in the largest forms (arrows). Small, triangular pieces (arrowheads) represent broken ends of needles.
(B) A sheaf of densely packed indinavir sulfate needles.
(C) Several indinavir crystal groupings are arranged in a rosette.