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Update Course Rewind 2025: Neck Pathologies - The Diagnostic Challenge

Video Published 2026-07-31

Timestops (3)

Lymphatic Malformation vs Ranula Diagnosis

Micromarsupialization Surgical Technique

Medical Therapies and Genetic Testing

Topic Overview

An ENT specialist presents a diagnostic challenge involving a 16-year-old with recurrent right submandibular swelling initially suspected to be a rannula but ultimately diagnosed as a lymphatic malformation after multiple interventions. The case illustrates the difficulty differentiating these two cystic neck masses, particularly when they abut the submandibular gland, and highlights that amylase testing can yield false positives when lymphatic malformations are near glandular tissue. Treatment evolved from cervical excision to sublingual gland excision and finally successful aspiration with sclerotherapy, and the discussion covers emerging genetic testing to guide targeted medical therapies for lymphatic malformations.

Key Takeaways

Amylase testing can falsely suggest ranula when lymphatic malformations abut salivary glands due to saliva leaching into cyst fluid. (1:28)
Micromarsupialization uses silk sutures for 30 days to create a fistula, allowing ranulas to drain spontaneously into the mouth. (2:25)
Gene panels identifying PIK3CA mutations can guide targeted therapy with alpelisib for lymphatic malformations. (2:53)
Sublingual gland excision plus cervical aspiration should resolve ranulas with cervical extension. (2:10)

Inside this episode

Kai, the Library's AI content creator, listened to this episode and mapped who's speaking, the chapters, key claims, and cases. Every item links to the exact moment in the recording.

AI-enriched

Who's speaking

Speaker 1 — host
Jill Knerath — host
Dr. Doug Van Alman — guest

Chapters

0:00Case Presentation and Differential Diagnosis — Introduction of a 16-year-old with right submandibular swelling and CT findings showing a cystic mass abutting the submandibular gland. Differential includes rannula versus lymphatic malformation.
1:03Treatment Course and Diagnostic Evolution — Initial cervical excision followed by recurrence, aspiration with amylase testing complications, sublingual gland excision, and ultimately successful sclerotherapy after ultrasound suggested lymphatic malformation.
2:06Management Approaches for Rannula and Lymphatic Malformations — Discussion of standard rannula treatment with sublingual gland excision, newer micromarsupialization technique, and treatment options for lymphatic malformations including procedural and emerging medical therapies.
3:11Differential Diagnosis Framework and Key Takeaways — Overview of congenital neck mass approach emphasizing need to address embryological components, and summary of diagnostic challenges and emerging genetic-guided therapies.

Key claims

0:50A rannula is a benign cyst that forms under the tongue caused by saliva leaking from a blocked sublingual gland — Jill Knerath
0:58Lymphatic malformations are clusters of lymph vessels that are often present at birth — Jill Knerath
1:14It can be really hard to differentiate a giant rannula from a lymphatic malformation — Dr. Doug Van Alman
1:24The lab tends to have trouble running thick fluid from cystic neck masses — Dr. Doug Van Alman
1:28Lymphatic malformations near glandular tissue can have leaching of saliva into them resulting in false positive amylase testing — Dr. Doug Van Alman
2:10Removal of the sublingual gland has been the best practice for rannula management — Dr. Doug Van Alman
2:16When a rannula has a cervical component, aspiration of that component combined with sublingual gland removal should resolve it — Dr. Doug Van Alman
2:25Micromarsupialization is a new technique for treating rannula with an intraoral component — Dr. Doug Van Alman
2:29Micromarsupialization involves placing silk sutures through the cyst, leaving them for 30 days to develop a fistula, then removing the sutures to allow spontaneous drainage into the mouth — Dr. Doug Van Alman
2:43There are 3 procedural treatments for lymphatic malformations: laser, sclerotherapy, and excision — Jill Knerath
2:49There are 3 medical therapies for lymphatic malformations still undergoing clinical trials — Jill Knerath
2:53Gene panels can now guide medical therapy for lymphatic malformations, particularly PIK3CA mutations which suggest alpelisib (a PI3K alpha inhibitor) can be useful — Dr. Doug Van Alman
3:15For congenital developmental neck masses, you must deal with the embryological component and etiology to prevent recurrence, not just excise the mass — Dr. Doug Van Alman

Cases discussed

0:3016-year-old with recurrent right submandibular swelling initially treated as rannula but ultimately diagnosed as lymphatic malformation

Open questions

What are the specific three medical therapies for lymphatic malformations currently in clinical trials?
What is the success rate of micromarsupialization compared to traditional sublingual gland excision for rannula?

This episode was analyzed and enriched by Kai, the Library's AI content creator. Every item links to the moment it comes from — click a timestamp to listen in context.

Keywords

rannula lymphatic malformation cystic neck mass submandibular swelling cervical excision aspiration sclerotherapy sublingual gland excision micromarsupialization laser therapy alpelisib Cincinnati Children's Hospital Stay Current MD

Hashtags

#PediatricSurgery #NeckMasses #LymphaticMalformations #Sclerotherapy #PediatricENT #LymphaticMalformation #NeckMass #PrecisionMedicine

Transcript

GlobalC MD along with Cincinnati Children's Hospital, sharing knowledge to improve child health around the globe. What's on your differential for cystic neck masses in pediatric patients? I'm Jill Knerath with Stay Current MD. In this video series, we're sharing highlights from our annual pediatric surgery update course in 2025. Today our topic is lymphatic malformation and granula management with Dr. Doug Van Alman, an ENT specialist at Cincinnati. Children. The 16 year old presented with right submandibular swelling. It was soft, painless, had a CT scan. This is the cystic mass heading up underneath the mandible, but you can see in the axial view that it abuts the submandibular gland on that right side. The differential diagnosis includes a rannula or a lymphatic malformation. A rannula is a benign cyst that forms under the tongue. It is caused by saliva leaking from a blocked sublingual gland. Lymphatic malformations. are different. These are clusters of lymph vessels that are often present at birth. In this particular patient, the next step was cervical excision. I decided to go with the cervical approach. My concern was being involved with the submandibular gland. It can be really hard to differentiate a giant granula from a lymphatic malformation. After excision, it recurred. So we did an aspiration in clinic and sent the fluid to be analyzed for amylase. The lab tends to have trouble running this thick fluid. And you can also have lymphatic malformations near glandular tissue that have leaching of the saliva into it and you get a false positive. I ended up assuming that this was a rannula and doing a sublingual gland excision, which should resolve that. Interventional radiology was consulted and did an aspiration and sclerotherapy, but the mass came back once again. I ended up getting an ultrasound as he was developing swelling, which suggested it was lymphatic malformation and By removing all that gland sublingual glandular tissue, that made me pretty confident that's what it was. After another aspiration in sclerotherapy, the mass resolved completely. It turns out it was a lymphatic malformation, not a rannula. So from a granular perspective, removal of the sublingual gland has been the best practice. When you have a cervical component, you can aspirate that and as long as you remove the sublingual gland, it should go away. What are some of the newer techniques? To treat anula. There is a new technique called micromarsupialization. If you can identify an intraoral component, you can throw some silk sutures through the cyst. You let that sit for 30 days. It develops fistula, and then you cut the sutures out and it will spontaneously drain into the mouth. For lymphatic malformations, there are 3 procedural treatments, including laser, sclerotherapy, and excision. There are also 3 medical therapies that are still undergoing. In clinical trials. The new development is that there are now gene panels that guide medical therapy, particularly the PIK 3CA mutations and lymphatic malformations suggest that alpeliid drug can be useful as a PI3K alpha inhibitor. Here's how we think about differential diagnoses for pediatric neck masses. These congenital development neck masses. Are the ones that you have to not just excise the mass, you have to deal with the embryological component and etiology to prevent that recurrence. What are our key takeaways? Both a rannula and a lymphatic malformation can present as cystic neck masses in the submandibular region. New targeted therapies are emerging. Genetic testing may help guide medical therapy using new medications, providing different treatment options for lymphatic malformations. Global Cat MD along with Cincinnati Children's Hospital, sharing knowledge to improve child health around the globe.

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