Tliis case affords a very fine example of the ravages inflicted on
the kidney, when a calculus of large size is deposited in its pelvis ;
there is reason to believe that this had been gradually augmenting
for nearly twenty years. Here the character of the urine had under-
' gone some change, and it had lost its decidedly acid quality, pro-
bably from the constant irritation to which the kidney was exposed,
an irritation which led likewise to the development of truly malig-
nant disease in some parts of the pelvis. Here likewise we had a
decided communication between the abscess and the descending
colon, of which we have one or two specimens preserved in the
museum at Guy's. Erom the mode in which the kidney had en-
larged and approached the surface, there would have been no danger
in drawing off the pus by means of a trocar, but in all probability
it would have been an operation of no permanent utiKty. I once
saw the kidney tapped by Mr. Morgan in a case of this kind, which
occurred to him in the hospital, and I lately heard a very interest-
ing case of the same kind related by Mr. Croft, who operated twice
or three times, drawing off large quantities of pus, but in neither
of these instances was the ultimate result favorable.
Case 9. — Cereiriform tumour of the right hidney, supposed to 5e
a tumour arising from the concave surface of the liver. — October
30th, 1836. — I was requested to see a young woman in the Borough,
who had lain-in with a healthy child five mouths before. The



230 ON ABDOMINAL TUMOURS.
