Neobladder stone

Lithiasis, late complication in neobladderNeobladder stone

Patient with a history of transitional cell tumor, with bladder resection and posterior urinary diversion: Neoblad and neobladder. He presented to the consultation 5 years later because of hematuria.

When a patient with a history of transitional cell tumor and ileal neobladder presents with hematuria, it is important to know that there are complications of hematuria in the short and long term.

• As parameters

  Factors to take into account we must know that:

1. Thethe risk of forming new stones at five years is 63.3~65%.
2. Thethe time of appearance of the stones is variable and can range from 6 months to several years later.

• As etiopathogenic factors we find

Pathogenesis and aetiology includes:

1. Main factor: urinary stasis.
2. The continuous secretory and absorptive function of the ileum and colon that contributes to the origin of lithiasis formation.
3. Metabolic acidosis: loss of bicarbonate and reabsorption of urine solutes.

• X-ray urinary tree:

  A radiopaque imagearea in right lower quadrant compatible with lithiasis.

Excretory urography, right hydronephrosis is observed, note that the right ureter is inserted very closely to the radiopaque lithiasis  instone in the Neobladderneobladder

• Complementary

  Correlative ultrasound: an echogenic imagefocus is observed,seen with posterior acoustic shadowshadowing.

• Color Doppler demonstrates posterior "color comet-tail sign". Highly suggestive finding of lithiasis

a stone.

Abdominal CT shows a slight dilatation of the excretory system on the right side, with distal lithiasisstone immediately prior to the insertion of the neobladder, which also presents a greatlarger internal lithiasisstone.