Skip to content
How It Works
Explore
Resources Ask a Question
Who It's For
Patients
Decode results, prep for appointments, weigh options.
Caregivers & advocates
Carry the research load for someone you love.
Providers & clinicians
Resources for patients in your practice.
Log In Ask a Question
PubMed This is a summary of 22 peer-reviewed journal articles Updated
Surgery · Lymphatic Malformation

Treatment Options and Strategies

At a Glance

Treatment for lymphatic malformations depends on the cyst type and your child's symptoms. Macrocystic malformations are typically treated with sclerotherapy injections, while microcystic types often respond to targeted medications like sirolimus. Surgery is used selectively.

Because lymphatic malformations (LMs) vary so much from child to child, there is no “one-size-fits-all” treatment. Instead, care is multidisciplinary, meaning a team of specialists—including surgeons, radiologists, and hematologists—works together to find the best path forward [1][2][3].

Deciding on the Right Strategy

The first question doctors ask is whether the malformation is symptomatic (causing pain or issues with breathing, eating, or movement) or asymptomatic (causing no physical problems) [1].

  • Observation (“Watch and Wait”): If the LM is small and not causing any functional issues, your doctor may recommend monitoring it with regular check-ups [1][4]. Some LMs remain stable for years [5].
  • Intervention: Treatment is usually recommended if the LM is growing rapidly, causing pain, or interfering with vital functions like the airway [6][5].

Treatment by Malformation Type

The strategy often depends on whether the malformation is macrocystic (large fluid pockets) or microcystic (small, sponge-like channels) [1].

For Macrocystic LMs: Sclerotherapy

Sclerotherapy is the most common first-line treatment for large cysts [7][8].

  • How it works: An interventional radiologist uses a needle to inject a special medicine (a sclerosant) directly into the cyst [9].
  • The Healing Process (Swelling Before Shrinking): It is critical to know that sclerosants work by causing intense localized inflammation. The cysts will often swell significantly and look much worse for a few days before they collapse and scar down [7]. If the LM is in the neck, this sudden swelling can threaten the airway, and doctors will often monitor the child overnight in the hospital to keep them safe [6][8].
  • Common agents: Medicines like bleomycin or OK-432 (Picibanil) are frequently used because they are effective at shrinking these large spaces [7][10].

For Microcystic or Complex LMs: Targeted Therapy

Because microcystic LMs are woven into healthy tissue, they are harder to treat with injections or surgery [11]. In these cases, doctors often use systemic therapy (medication that works throughout the body) [11].

  • Sirolimus (Rapamycin): This medication acts like a “dimmer switch” for the overactive growth signals inside the malformation, shrinking the cysts without surgery [11][12]. Important safety note: Sirolimus is an immunosuppressant. It lowers the child’s ability to fight off infections and can cause side effects like mouth sores and elevated cholesterol [11][13]. Children taking it require frequent blood work to monitor their immune system and medication levels [12].
  • Alpelisib: This is a promising, emerging medication being studied for complex cases [14]. Because it is so new, it is often difficult to get insurance approval, and it is usually reserved for cases that don’t respond fully to sirolimus [15].

The Role of Surgery

Surgical resection (removing the malformation) was once the standard treatment, but it is now used more selectively [16][17].

  • When it’s used: Surgery may be recommended when a malformation is easy to reach and can be removed completely without damaging important nerves or blood vessels [18][19].
  • The risks: The primary risk of surgery is injury to nearby structures, such as the nerves that control facial movement or swallowing [18][20]. Because these malformations don’t have clear edges, there is also a chance they can grow back if any part is left behind [21][22].

Your care team will help you weigh the benefits of each option. Find out what to expect long-term in Living with a Lymphatic Malformation: Monitoring and Red Flags.

Common questions in this guide

What is the best treatment for a large macrocystic lymphatic malformation?
Sclerotherapy is typically the first-line treatment for macrocystic lymphatic malformations. An interventional radiologist injects a medicine into the cyst to cause inflammation, which makes it shrink and scar down over time.
Are there non-surgical treatments for microcystic lymphatic malformations?
Yes, microcystic malformations are often treated with targeted systemic medications like sirolimus. This medication helps shrink the cysts by acting like a dimmer switch for overactive growth signals, though it requires regular blood tests to monitor immune function.
Why does a lymphatic malformation look worse right after sclerotherapy?
Sclerotherapy medications work by creating intense localized inflammation inside the cyst. This causes the malformation to swell significantly and look worse for a few days before it finally collapses and heals.
Is surgery always necessary to remove a lymphatic malformation?
No, surgery is now used much more selectively. It is usually recommended only when the malformation is easy to reach and can be completely removed without risking damage to important nearby nerves or blood vessels.
When is a watch and wait approach appropriate?
Observation is often recommended if the malformation is small, asymptomatic, and not causing any functional issues with breathing, eating, or movement. Many of these malformations can remain completely stable for years without needing active treatment.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Which specialist will lead my child's multidisciplinary team?
  2. 2.If we choose sclerotherapy, how many sessions are typically required for a malformation of this size?
  3. 3.What are the potential side effects of sirolimus, and how often will we need to do blood work to monitor it?
  4. 4.If we decide on a 'watch and wait' approach, how often should we come back for follow-up scans?
  5. 5.What are the specific surgical risks if the malformation is near a nerve or a major blood vessel?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (22)
  1. 1

    Lymphatic malformations.

    Kulungowski AM, Patel M

    Seminars in pediatric surgery 2020; (29(5)):150971 doi:10.1016/j.sempedsurg.2020.150971.

    PMID: 33069296
  2. 2

    Lymphatic malformations: a 20-year single institution experience.

    Kronfli AP, McLaughlin CJ, Moroco AE, Grant CN

    Pediatric surgery international 2021; (37(6)):783-790 doi:10.1007/s00383-021-04859-5.

    PMID: 33586010
  3. 3

    An integrated multidisciplinary team approach to the management of vascular anomalies: challenges and benefits.

    Sires JD, Williams N, Huilgol SC, et al.

    Pediatric surgery international 2020; (36(10)):1149-1156 doi:10.1007/s00383-020-04727-8.

    PMID: 32770386
  4. 4

    Percutaneous sclerotherapy for head and neck lymphatic malformations in neonates and infants ≤12 months of age.

    Caton MT, Duvvuri M, Baker A, et al.

    Journal of neurointerventional surgery 2023; (15(12)):1242-1246 doi:10.1136/jnis-2022-019516.

    PMID: 36414388
  5. 5

    A Rare Cause of Dyspnea: Cervicothoracic Cystic Lymphangioma.

    Jo MS, Jeong JY

    The Journal of craniofacial surgery 2017; (28(7)):e706-e707 doi:10.1097/SCS.0000000000003904.

    PMID: 28872508
  6. 6

    Impending Airway Threat in a Neonate: Intralesional Sclerotherapy As Salvage Therapy for Giant Congenital Cervical Cystic Hygroma.

    Saleem MM, Rehman H, Shamim H, et al.

    Cureus 2026; (18(1)):e101809 doi:10.7759/cureus.101809.

    PMID: 41717161
  7. 7

    Results of Injection Sclerotherapy with Bleomycin in Pediatric Lymphatic Malformations.

    Kumar V, Choudhury SR, Yadav PS, et al.

    Journal of Indian Association of Pediatric Surgeons 2021; (26(4)):223-227 doi:10.4103/jiaps.JIAPS_94_20.

    PMID: 34385764
  8. 8

    Airway response to sirolimus therapy for the treatment of complex pediatric lymphatic malformations.

    Alemi AS, Rosbe KW, Chan DK, Meyer AK

    International journal of pediatric otorhinolaryngology 2015; (79(12)):2466-9.

    PMID: 26549380
  9. 9

    Bleomycin for Percutaneous Sclerotherapy of Venous and Lymphatic Malformations: A Retrospective Study of Safety, Efficacy and Mid-Term Outcomes in 26 Patients.

    Nevesny F, Chevallier O, Falvo N, et al.

    Journal of clinical medicine 2021; (10(6)) doi:10.3390/jcm10061302.

    PMID: 33809919
  10. 10

    Sclerosing agents in the management of lymphatic malformations in children: A systematic review.

    Fernandes S, Yeung P, Heran M, et al.

    Journal of pediatric surgery 2022; (57(5)):888-896 doi:10.1016/j.jpedsurg.2021.12.056.

    PMID: 35151497
  11. 11

    CLAPO syndrome: Effective response to treatment with oral rapamycin.

    González-Hermosa MR, Guerra E, Tuduri I, et al.

    Dermatologic therapy 2019; (32(4)):e12991 doi:10.1111/dth.12991.

    PMID: 31172613
  12. 12

    Efficacy and safety of sirolimus in the treatment of vascular anomalies: A systematic review.

    Freixo C, Ferreira V, Martins J, et al.

    Journal of vascular surgery 2020; (71(1)):318-327 doi:10.1016/j.jvs.2019.06.217.

    PMID: 31676179
  13. 13

    Efficacy of sirolimus in children with lymphatic malformations of the head and neck.

    Wiegand S, Dietz A, Wichmann G

    European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery 2022; (279(8)):3801-3810 doi:10.1007/s00405-022-07378-8.

    PMID: 35526176
  14. 14

    The Role of Interventional Radiologists in the Treatment of Congenital Lymphatic Malformations.

    Cronan J, Gill AE, Shah JH, Hawkins CM

    Seminars in interventional radiology 2020; (37(3)):285-294 doi:10.1055/s-0040-1713446.

    PMID: 32773954
  15. 15

    Alpelisib to treat CLOVES syndrome, a member of the PIK3CA-related overgrowth syndrome spectrum.

    Garreta Fontelles G, Pardo Pastor J, Grande Moreillo C

    British journal of clinical pharmacology 2022; (88(8)):3891-3895 doi:10.1111/bcp.15270.

    PMID: 35146800
  16. 16

    Active Observation as an Alternative to Invasive Treatments for Pediatric Head and Neck Lymphatic Malformations.

    Bonilla-Velez J, Whitlock KB, Ganti S, et al.

    The Laryngoscope 2021; (131(6)):1392-1397 doi:10.1002/lary.29180.

    PMID: 33107991
  17. 17

    Lymphatic and Mixed Malformations.

    Hathaway BA, Radu S, Wilson J, Nauta AC

    Lymphatic research and biology 2021; (19(1)):41-50 doi:10.1089/lrb.2020.0100.

    PMID: 33493408
  18. 18

    Cystic hygroma of the neck: single center experience and literature review.

    Damaskos C, Garmpis N, Manousi M, et al.

    European review for medical and pharmacological sciences 2017; (21(21)):4918-4923.

    PMID: 29164568
  19. 19

    Coexistence of Acute Appendicitis and Mesenteric Cystic Lymphatic Malformation in an Adult: A Case Report and Narrative Review of Intraoperative Management Strategies.

    Barbu LA, Cercelaru L, Vîlcea ID, et al.

    Life (Basel, Switzerland) 2025; (15(9)) doi:10.3390/life15091390.

    PMID: 41010332
  20. 20

    Case report of a chest wall cystic hygroma in a teenager.

    Aimanan K, Putera MP, Chew LG, et al.

    The Medical journal of Malaysia 2016; (71(5)):292-293.

    PMID: 28064298
  21. 21

    Treatment of cystic hygroma in a young infant through multidisciplinary approach involving sirolimus, sclerotherapy, and debulking surgery.

    Azouz H, Salah H, Al-Ajlan S, Badran M

    JAAD case reports 2016; (2(4)):350-3 doi:10.1016/j.jdcr.2016.05.019.

    PMID: 27617284
  22. 22

    Patients with lymphatic malformations who receive the immunostimulant OK-432 experience excellent long-term outcomes.

    Ghaffarpour N, Petrini B, Svensson LA, et al.

    Acta paediatrica (Oslo, Norway : 1992) 2015; (104(11)):1169-73 doi:10.1111/apa.13086.

    PMID: 26081020

This page explains treatment options for pediatric lymphatic malformations for educational purposes only. Always consult your child's multidisciplinary care team to determine the safest and most effective approach for their specific situation.

Get notified when new evidence is published on Isolated rare lymphatic malformation.

We monitor PubMed for new peer-reviewed studies on this topic and email a short summary when something meaningful changes.