A 'coffin-lid' appearance is characteristic of which urinary crystal?
Show answer and explanation
Correct answer: Triple phosphate (Struvite)
Triple phosphate crystals, composed of magnesium ammonium phosphate, typically appear as colorless prisms with 3 to 6 sides, resembling a coffin lid. They are commonly found in alkaline urine, often associated with urea-splitting bacterial infections.
Keep practicing
More Urinalysis questions
- Which protein is the primary constituent of the matrix of all urinary casts?
- Which urinary cast is virtually pathognomonic for acute glomerulonephritis?
- A 'Maltese cross' pattern under polarized light in the urine sediment is associated with:
- What is the typical urine pH range for the formation of Uric Acid crystals?
- The 'Specific Gravity' measured by a dipstick is based on which principle?
- Which crystal is described as a 'colorless, hexagonal plate' and is indicative of a rare metabolic defect?