 Welcome back to another session in dentistry and more. Topic for today is mucosil or ranula. So mucous is an exclusive secretory product of the accessory minor salivary glands and the most prominent product of the sublingual gland. So it is the most prominent product of sublingual gland. So the mechanism for mucous cavity development is either extraversation or pretension. So these two mechanisms can result in mucous cavity development. So extraversation is nothing but the leakage of fluid from the decks or asinine into the surrounding tissue. That is extra means outside, the vasa means the vessel. So outside the vessel there will be leakage of fluid and it will be collected into the surrounding tissue. Whereas retention it is a narrowed ductile opening which cannot adequately accommodate the exit of saliva which is produced which leads to the ductile dilation and surface swelling. So which is a less common phenomena, this is the most common phenomena. So this happens when the ductile opening is narrow that cannot adequately accommodate the saliva. So what happens is it leads to ductile dilation and surface swelling. So mucosil which is exclusive of the irritation fibroma, so mucosil is irritation fibroma which are the most common type of benign soft tissue masses in the oral cavity, benign soft tissue mass which is irritation fibroma and as a benign soft tissue mass. So mucosil means mucous and the seal means a cavity. So when this mucosil occurs in the floor of the mouth which is known as ranula. So the mucosil in the floor of the mouth is known as ranula. So this mucosil which consists of a circumscribed cavity in the connected tissue and submucosa which producing an obvious elevation in the mucosa. So that is how it has got an elevation, a dome shaped elevation. So the majority of the mucosil results from an extraversation of fluid into the surrounding tissue after the traumatic break in the continuity of the ducts and it does not have a true epithelial lining. So there is no true epithelial lining for the mucosa, epithelial lining, I mean lining for the mucosil. So what is ranula? Okay ranula I told you the mucosil which is seen in the floor of the mouth. So this term used for the mucosils occur in the floor of the mouth. Why it has got that peculiar name? Because the word rana, because it resembles the swelling. This swelling resembles the translucent underbelly of the frog. As you can see the picture here, underbelly of frog. That is why it has got that peculiar name because this swelling resembles the translucent underbelly of the frog and it has got classification such as congenital or acquired and it is also be found in newborn infants. Ethiology as I told there will be an obstruction of one of the salivary glands and it is mostly a retention cyst and there will be spontaneous results after a surgery of the floor of the mouth especially in this submantibular duct area. So this extravasation cyst which can be arising from the gland of none or bluntin or also can be from submantibular gland which is also in that region. So initially there is a blockage of duct which causes retention cyst and with increased pressure there is rupture of SNI leading to extravasation cyst. So first is retention cyst that will be rupturing and it is becoming an extravasation cyst and it is a smooth cystic swelling under the tongue usually on one side and it presents as a blue dome shaped swelling in the floor of the mouth which is overlying the blood vessels. So they tend to be larger than mucosails and can fill the floor of the mouth completely and it can also elevate the tongue and it is if it is very larger it can affect both breathing and swallowing. So it has got a different variety that is plucking or cervical ranula, cervical ranula. So it occurs when the sphilt mucin dissects through the myelohydr muscle and produce swelling in the neck. So extravasation of mucos occurs behind the confines of the floor of the mouth through the myelohydr muscle into the upper neck or submental region. It is like soft cross-flecture and non-tender, dumbbell shaped swelling in submantibular region and it can be bi-digitally palpable. And it is quite difficult to distinguish from cystic hygroma but it can be easily picked up by MRI because hygroma has simple epithelial lining. Ranula contains very loose connected tissues. So treatment of ranula is excision with strict removal of any projecting peripheral salivary glands and always try to avoid injury to other glands during the primary wound closure. And we can also do simple aspiration or drainage but it will result in high recurrence. So both simple and plucking, ranula needs excision of the cyst wall and sublingual gland. There should be great care to preserve the lingual nerve. Sometimes this ranula, presending in neck may need cervical incision. So that is all about ranula, we are discussing about the mucosil and ranula. Mucosil is a dome shaped fluid filled cavity because of the rupture of the salivary glands minus salivary gland and ranula which is happening in the floor of the mouth and because of the peculiar shape it looks like a W frog, it has got this name ranula and the types and how it forms extracurrication and retention process finally the treatment part. So I will come up with a new topic in dentistry and more, thank you.