Short answer · Medically reviewed summary · Last updated: 2026-05-08
Mixed Connective Tissue Disease (MCTD) is most commonly referred to as Sharp Syndrome, named after Gordon Sharp who first described the condition in 1972. While it is officially categorized as Mixed Connective Tissue Disease in major medical databases, you may encounter it in older or international literature under various names reflecting its overlapping nature with systemic lupus erythematosus, systemic sclerosis, and polymyositis. What are the common synonyms for Mixed Connective Tissue Disease? Because Mixed Connective Tissue Disease (MCTD) presents as a "hybrid" condition, it has historically carried several names that describe its overlapping features.
Mixed Connective Tissue Disease (MCTD) synonyms
Other names for Mixed Connective Tissue Disease (MCTD): synonyms, acronyms and related terms used by doctors and patients.
Mixed Connective Tissue Disease (MCTD) is most commonly referred to as Sharp Syndrome, named after Gordon Sharp who first described the condition in 1972. While it is officially categorized as Mixed Connective Tissue Disease in major medical databases, you may encounter it in older or international literature under various names reflecting its overlapping nature with systemic lupus erythematosus, systemic sclerosis, and polymyositis.
What are the common synonyms for Mixed Connective Tissue Disease?
Because Mixed Connective Tissue Disease (MCTD) presents as a "hybrid" condition, it has historically carried several names that describe its overlapping features. The most recognized clinical synonym is Sharp Syndrome. Other terms you might find in historical medical records or specific international journals include:
- Sharp Syndrome (the most frequent eponymous name)
- Overlapping Connective Tissue Disease
- Mixed Connective Tissue Disease Syndrome
- MCTD (the standard medical abbreviation)
Why does Mixed Connective Tissue Disease have multiple names?
The naming of Mixed Connective Tissue Disease is largely a result of its discovery as a distinct clinical entity in the early 1970s. Before researchers identified that patients with high titers of anti-U1-RNP antibodies shared a specific clinical profile, these individuals were often diagnosed with individual components of the disease, such as Lupus or Scleroderma. The term Mixed Connective Tissue Disease was adopted to represent this unique clustering of symptoms that does not fit neatly into one single classification.
How is the disease classified in medical systems?
In modern clinical practice, Mixed Connective Tissue Disease is the preferred nomenclature used by rheumatologists worldwide. It is formally indexed in major databases to ensure consistency in research and patient care:
- Orphanet: Classified as ORPHA:572.
- ICD-10/11: Often coded under M35.1 (Other overlap syndromes).
- OMIM: Documented as #154790.
- NIH GARD: Recognizes the condition officially as Mixed Connective Tissue Disease.
Next steps
- Consult a board-certified rheumatologist to confirm your diagnosis and treatment plan.
- Join the 273 members at DiseaseMaps.org who are currently navigating life with Mixed Connective Tissue Disease.
- Request your medical records using the term "Mixed Connective Tissue Disease (MCTD)" to ensure clarity with all your providers.
Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment.
References
- Orphanet (ORPHA:572): Mixed Connective Tissue Disease.
- NIH Genetic and Rare Diseases Information Center (GARD): Mixed Connective Tissue Disease.
- OMIM (Online Mendelian Inheritance in Man): #154790.
- Sharp GC et al. "Mixed connective tissue disease—an apparently distinct rheumatic disease syndrome associated with a specific antibody to an extractable nuclear antigen (ENA)." Am J Med. 1972.
