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| | THE MERCK MANUAL, Sec. 6, Ch. 70, Bronchiectasis |
 | | In these syndromes, structural or functional abnormalities in ciliary organelles result in defective mucociliary clearance that leads to suppurative bronchial infections and bronchiectasis as well as chronic rhinitis, serous otitis media, male sterility, corneal abnormalities, sinus headaches, and a poor sense of smell. |
 | | Absent are the ciliary abnormalities seen in the PCD syndromes, the genetic and electrolyte abnormalities characteristic of cystic fibrosis, and the genetic mutations found in congenital absence of the vas deferens, which accounts for about 6% of obstructive azoospermia. |
 | | The yellow nail syndrome, believed to be due to a congenital hypoplasia of the lymphatic system, is recognized by thickened, curved, yellowish to greenish nails (see Plate 70-1) and primary lymphedema. |
| www.merck.com /mrkshared/mmanual/section6/chapter70/70a.jsp (3323 words) |
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