Kleine-Levin syndrome synonyms

Kleine-Levin syndrome is most commonly referred to by its eponym, but it is also historically known as "Sleeping Beauty syndrome" due to its characteristic episodes of hypersomnia. In medical literature, it is officially recognized as Kleine-Levin syndrome (KLS), and it is classified under the International Classification of Sleep Disorders (ICSD-3) as a disorder of central hypersomnolence.

What are the common synonyms and historical names for Kleine-Levin syndrome?

While Kleine-Levin syndrome is the universally accepted medical term, you may encounter several alternative names in older medical records or popular media. The most prevalent synonym is "Sleeping Beauty syndrome," a colloquialism that gained traction because of the dramatic, prolonged sleep episodes associated with the condition. Historically, some clinicians referred to the condition as "periodic hypersomnia" or "recurrent hypersomnia," which describes the episodic nature of the symptoms. In older European literature, you might occasionally see it described as "the Kleine-Levin-Critchley syndrome," recognizing the contributions of Macdonald Critchley, who helped refine the clinical description of the disorder in the 1940s.

Why does Kleine-Levin syndrome have multiple names?

The variety of names for Kleine-Levin syndrome stems from its historical evolution as a recognized clinical entity. Initially, physicians identified the syndrome based on distinct clusters of symptoms, often naming them after the clinicians who first documented the cases. As neurological understanding improved, the medical community moved away from eponyms and toward descriptive terminology. However, because the exact pathophysiology of Kleine-Levin syndrome remains a subject of ongoing research, the original eponym persists as the most reliable diagnostic label in clinical practice to ensure consistency across international health databases.

How is Kleine-Levin syndrome classified in medical databases?

For research and insurance purposes, Kleine-Levin syndrome is indexed under specific codes that help clinicians track the disease. Understanding these codes can be helpful when navigating your medical records or insurance claims:

• ICD-10-CM: G47.13 (Recurrent hypersomnia)


• Orphanet: ORPHA489 (Kleine-Levin syndrome)


• OMIM: 160800 (Kleine-Levin syndrome)


• ICSD-3: Classified within the "Disorders of Central Hypersomnolence" category

Which name should patients use when searching for information?

When searching for clinical literature or community support, it is best to use Kleine-Levin syndrome or its abbreviation, KLS. Using the official name ensures that you find peer-reviewed research and verified information from organizations like the NIH or Orphanet, rather than anecdotal or outdated information. Currently, 13 members of the DiseaseMaps.org community have shared their experiences with Kleine-Levin syndrome, providing a valuable resource for those seeking peer support using the standardized terminology recognized by the global rare disease community.

Next steps

• Consult a board-certified sleep specialist or neurologist if you suspect symptoms of Kleine-Levin syndrome.


• Request that your physician uses the ICD-10 code G47.13 on medical documentation to ensure accurate classification.


• Join the DiseaseMaps.org community to connect with other patients and caregivers navigating the diagnostic and treatment journey.


• Keep a detailed sleep-wake diary to assist your physician in documenting the frequency and duration of your episodes.

Medical disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the advice of a qualified healthcare provider with any questions regarding a medical condition.

References

• Orphanet: Kleine-Levin syndrome (ORPHA489)


• NIH Genetic and Rare Diseases (GARD) Information Center: Kleine-Levin syndrome


• OMIM (Online Mendelian Inheritance in Man): Kleine-Levin syndrome (Entry 160800)


• Kleine-Levin Syndrome Foundation: Clinical Guidelines and Resources