. Evolution and disease . 82 E VOL UTION AND DISEASE Those occurring in the lower part of the neck endblindly. The usual situations of the four branchial slitsare indicated in fig. 39. Sometimes we find in the situations frequented bythese fistulae instead of openings small rounded white. Fig. 39.—A side view of the neck; the figures II, IIIand IV indicate the common situations of branchialfistuloe. patches of skin, natural cicatrices, indicating the points ofobliteration of the clefts. It is by no means infrequentto find the cutaneous orifice of a persistent branchial slitsurmounted by a cuta
. Evolution and disease . 82 E VOL UTION AND DISEASE Those occurring in the lower part of the neck endblindly. The usual situations of the four branchial slitsare indicated in fig. 39. Sometimes we find in the situations frequented bythese fistulae instead of openings small rounded white. Fig. 39.—A side view of the neck; the figures II, IIIand IV indicate the common situations of branchialfistuloe. patches of skin, natural cicatrices, indicating the points ofobliteration of the clefts. It is by no means infrequentto find the cutaneous orifice of a persistent branchial slitsurmounted by a cutaneous tag, which often contains asmall nodule of yellow elastic cartilage resembling thatfound in the pinna; these projecting pieces of skin often VESTIGIAL STRUCTURES. 83 occur unassociated with fistulae, and are most commonin two situations in theneck, at the spotsmarked III and IV infig. 39. As a rule theyare symmetrical; usuallythey are short, oftenlooking like mere pim-ples on the side of theneck. In some casesthey may attain alength of two or threecentimetres. A verylarge one is repre-sented as it grew
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Keywords: ., bookcentury1800, bookdecade1, booksubjectcongenitalabnormalities
