A pubic hair introduced into the urinary bladder may form the nidus of a bladder stone.
Ways that a pubic hair may enter the urinary bladder:
(1) urinary catheterization
(2) suprapubic access to the urinary bladder
(3) possibly introduction by the patient
(4) teratoma
Risk factors:
(1) neurogenic bladder
(2) repeated catheterizations or indwelling catheter
(3) long and abundant pubic hair (with shaving of pubic hair associated with reduced risk)
Clinical features:
(1) linear stone material in the bladder
Pathologic features: examination of the stone shows a core of hair material (after stone dissolution, sectioning, crushing)
Differential diagnosis:
(1) bladder stone formed around another type of foreign body (suture, surgical mesh, etc)
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Specialty: Nephrology, Clinical Laboratory
