CT scans of 40 patients without pathology in the floor of the mouth or the submandibular glands were reviewed. Intraglandular ducts were visualized in 27 and extraglandular ducts in 3 patients. The CT appearances of dilated submandibular ducts are described in 4 patients with proven causes of obstruction. Widening of the narrow gutter between the mylohyoid and hyoglossus muscles in one scan level is a prominent feature. An intra- or extraglandular duct diameter of 3 mm or more indicates possible obstruction, and the CT images should be scrutinized to reveal the cause.
BryanR. N.MillerR. H.FerreyroR. L.SessiousR. B.: Computed tomography of the major salivary glands. AJR139 (1982), 547.
2.
Cunningham'stextbookofanatomy, 12th edn, p. 428. Oxford University Press, Oxford1981.
3.
Gray'sanatomy, 37th edn, p. 1292, Churchill & Livingstone, London 1989.
4.
LarssonS. G.LufkinR. B.HooverL. A.: Computed tomography of the submandibular salivary glands. Acta Radiol.28 (1987), 693.
5.
LarssonS. G.MancusoA.HanafeeW.: Computed tomography of the tongue and floor of the mouth. Radiology143 (1982), 493.
6.
MurakiA. S.MancusoA. S.HarnsbergerH. R.JohnsonL. P.MeadsG. B.: CT of the oropharynx, tongue base, and floor of the mouth. Normal anatomy and range of variations, and applications in staging carcinoma. Radiology148 (1983), 725.
7.
RabinovK.KellT.GordonP. H.: CT of the salivary glands. Radiol. Clin. North Am.22 (1984), 145.
8.
SalukP. H.SwartzJ. D.KorsvikH.MarloweF. I.: High-resolution tomography of the major salivary glands. J. Comput. Tomogr.9 (1985), 39.
