A CLINICO.PATHOLOGICAL STUDY OF ANAL FISTULAE

List of Fisure$
Figure
Page
Fig. (l): Anal canal 3
Fig. (?): Epithelium lining of the anal canal. 5
Fig. (3): An anal gland connected to an anal pit. 5
Fig. (a); The voluntary and involuntary muscles of the anal canal.
Fig. (5): The levator ani muscles.
Fig (6): Puborectalis muscle.
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Fig. (7): Coronal diagram ofthe para-anal and para rectal space$. 13
Fig. (8): Lateral diagram ofthe posterior spaces. 13
Fig. (9): Coronal diagram of the para-rectal 14
and phra-anal spaces illustrating how an abscess can track
posteriorly from one lateral.space to gain access to contralateral
space.
Fig. (10): Endoscopic gastric mucosal biopsy speciinen' 28
from an AIDS patient showing typical cytomegalicell shows a
Iarge, densely stained nucleus with intracytoplasmic inclusions
(original maginfi cation x400),
Fig. (l l): Routine histiologic section ftom an AIDS patient.
3l
Left, the many cytomegalicells show infection of various cell
types including vascular endothelium (small arrow), fibroblasts
(medium arrow), and smooth muscle cells (large anow)
(original magnification x 200). Right, rnost of endothelial cells
in the three blood vesselshown arc cl4omegalic. Ischemi as a
result of vascular occlusion may be important in the
pathogenesis of ulceration (original magnification x 200).