Nasopalatine duct cyst.Nasopalatine duct cysts are the most corm-non nonodontogenic developmental cysts originating in the incisive canal of the maxillae.(1) These cysts were once formally classified as and called fissural cysts. They were believed to originate in entrapped epithelium in embryonic fissures during the development of the orofacial region. (1) The pathogcnesis is now believed to arise from remnants of the embryonic nasopalatine duct. (2) The case presented here is that of a 50-year-old woman who had a nasopalatine duct cyst cyst, abnormal sac in the body, filled with a fluid or semisolid and enclosed in a membrane. Cysts can be congenital but are usually acquired, the most common locations being the skin and the ovaries. that had been incidentally discovered in the anterior nasopalatine area on computed tomography (CT) (figure 1) and magnetic resonance imaging magnetic resonance imaging (MRI), noninvasive diagnostic technique that uses nuclear magnetic resonance to produce cross-sectional images of organs and other internal body structures. (MRI 1. (application) MRI - Magnetic Resonance Imaging. 2. MRI - Measurement Requirements and Interface. ) (figure 2). [FIGURE 1 & 2 OMIITED] A nasopalatine duct cyst can arise at any age, but it is seen most often in patients between 30 and 60 years of age. There is no gender predilection. These cysts are usually asymptomatic; on occasion, they present as a palatal pal·a·tal adj. Palatine. palatal (pal´  t soft-tissue mass. On CT and panoramic radiography, a nasopalatine duct cyst appears as a well-defined bone defect in the anterior midline mid·linen. A medial line, especially the medial line or plane of the body. midline, n the line equidistant from bilateral features of the head. of the palate between and posterior to the central incisors. On MRI, the cyst is identified as a high-intensity, well-marginated lesion in most sequences, which indicates that it contains proteinaceous material. These cysts vary in size; most are less than 2 cm, while others are large enough to cause nasal obstruction. (3) References (1.) Caruso PA, Rincon S, Weber AL. Lesions of the maxilla maxilla /max·il·la/ (mak-sil´ah) pl. maxil´las, maxil´lae [L.] the irregularly shaped bone that with its fellow forms the upper jaw. max´illary max·il·la n. pl. : Crossroads of the head and neck. Neuroimaging Clin N Am 2003;13: 411-26. (2.) Gardner D. Oral cavity and jaws. In: Pilch BZ, ed. Head and Neck Surgical Pathology. Philadelphia: Lippincott Williams and Wilkins, 2001 : 195-229. (3.) Curtin HD, Wolfe P, Gallia L, May M. Unusually large nasopalatine cyst: CT findings. J Comput Assist Tomogr 1984;8:139-42. From the Department of Radiology, Louisiana State University Louisiana State University and Agricultural and Mechanical College, generally known as Louisiana State University or LSU, is a public, coeducational university located in Baton Rouge, Louisiana and the main campus of the Louisiana State University System. Health Sciences Center, New Orleans. 
I have one question..if this is a no big deal why is it that I have gone thur two surgerys in a 5 year period and yet have not found another person who has this??? Would love to know others . Pam
Jim Norcal (Member): that little bump on the roof of the mouth behind the two front teeth .. right? 4/7/2010 6:39 PM
I have that symptom right now. It has come and gone off and on over the years and I'm pretty sure I remember having as far bas as my early twenties are maybe even teen years. I remember my mom once complained about it and my wife gets it once in a great while as well. It always goes away with no evidence that it was even there (that any mortal without sophisticated equipment could tell anyway). I don't know why makes it appear but I do know that although mostly painless, it is an irritation at least. There doesn't seem to be a lot of information on the net about it that us normal, non-dentist type people can understand.
I can't imagine it becoming so bad that one would have to undergo a surgery to have it removed. It must become a real, sizable problem if that's the case. Yikes.
This just happened to me, it started with a 2mm lump behind my front left tooth however after doing a root canal and multiple passes of antibiotics it kept regrowing. after 10 days from when they lanced it when they finally removed it, it had grown to 12x6x4mm and it was almost impossible to eat. From the time they performed any actions till it regrew was ~ 7 days.
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