67 Diseases That Start With The Letter J

Have you ever wondered about diseases that start with the letter “J”? Wonder no more, this article is exactly what you are looking for.

In this article, I will dive into the realm of some known and lesser-known diseases beginning with this enigmatic letter J, aiming to raise awareness and understanding.

So, without any further ado, let’s embark on this fascinating journey and broaden our understanding of diseases that start with the letter J.

Diseases That Start With J

The followings are some known and lesser-known diseases that begin with the letter J (In alphabetical order):

1. Jaagsiekte (Ovine Pulmonary Adenocarcinoma): Jaagsiekte, also known as Ovine Pulmonary Adenocarcinoma, is a contagious viral disease that primarily affects sheep and goats. It causes tumors to develop in the lungs, leading to breathing difficulties and, ultimately, respiratory failure. The disease can spread rapidly within a flock and poses significant economic implications for farmers in the affected regions.

2. Jackson-Weiss Syndrome: Jackson-Weiss Syndrome is a rare genetic disorder characterized by premature fusion of certain skull bones, affecting the shape of the head and face. Additionally, it may cause abnormalities in the feet. Early diagnosis and appropriate medical intervention are crucial to managing the condition and minimizing its impact on the individual’s quality of life.

3. Jammed Finger: A jammed finger is a common sports-related injury where the finger’s joint gets forcefully compressed, causing pain, swelling, and limited mobility. While it can be treated with rest, ice, compression, and elevation (RICE), severe cases might require medical attention to prevent long-term complications.

4. Jansen’s Disease: Jansen’s Disease, also known as Metaphyseal Chondrodysplasia, is a rare genetic disorder affecting bone growth. It leads to abnormal bone development, resulting in dwarfism and skeletal deformities. Treatment options mainly focus on managing the symptoms and enhancing the individual’s overall well-being.

5. Jansen’s Metaphyseal Chondrodysplasia: Jansen’s Metaphyseal Chondrodysplasia is an inherited skeletal disorder characterized by distinctive bone abnormalities. It can lead to short stature, joint pain, and other orthopedic issues. Treatment is typically supportive, and medical professionals focus on addressing specific symptoms.

6. Japanese Congenital Muscular Dystrophy: This is a rare form of muscular dystrophy that affects infants and leads to muscle weakness and wasting. The condition is caused by genetic mutations, and while there is currently no cure, therapies aim to manage symptoms and improve the affected individual’s quality of life.

7. Japanese Encephalitis Virus: Japanese Encephalitis Virus is a mosquito-borne viral infection that can cause inflammation in the brain, leading to severe neurological complications. Vaccination is available for prevention in regions where the disease is endemic.

8. Japanese Encephalitis Virus Prophylaxis: This term refers to preventive measures and vaccination strategies against the Japanese Encephalitis Virus. Travelers to endemic areas are often advised to take appropriate precautions.

9. Japanese Spotted Fever: Japanese Spotted Fever is a tick-borne infectious disease caused by the bacterium Rickettsia japonica. It presents with symptoms like fever, rash, and headache and can be treated effectively with antibiotics.

10. Jarcho-Levin Syndrome: Jarcho-Levin Syndrome is a rare genetic disorder that affects the development of the spine and ribs, resulting in respiratory difficulties. Treatment is typically supportive and aims to manage the complications associated with the skeletal abnormalities.

11. Jaundice: Jaundice is a condition characterized by yellowing of the skin and the whites of the eyes. It occurs when there is an excess of bilirubin, a pigment produced during the breakdown of red blood cells. Jaundice can be a symptom of various underlying conditions, such as liver diseases or blockage of the bile ducts.

12. Jaundice in Newborns: Jaundice is relatively common in newborns and usually occurs as a result of the immature liver’s inability to efficiently process bilirubin. Most cases of newborn jaundice resolve on their own without treatment, but severe cases may require phototherapy to lower bilirubin levels.

13. Jaw Dislocation: Jaw dislocation happens when the lower jawbone (mandible) moves out of its normal position at the temporomandibular joint (TMJ). This condition can be extremely painful and may cause difficulty in speaking and eating. Immediate medical attention is required to safely relocate the jaw and prevent further complications.

14. Jaw Fracture: A jaw fracture is a break in the jawbone, commonly caused by trauma or accidents. Depending on the severity and location of the fracture, treatment may involve immobilization, wiring the jaw shut, or surgical intervention.

15. Jaw Tumors: Tumors can develop in the jawbone, either benign or malignant, which may cause pain, swelling, or changes in facial appearance. Treatment options vary depending on the type and stage of the tumor, and may include surgery, radiation, or chemotherapy.

16. Jaw Tumors and Cysts: Jaw tumors and cysts are abnormal growths that can occur in the jawbone. While some may be non-cancerous, others can be cancerous or precancerous. Prompt diagnosis and appropriate treatment are essential to prevent complications and improve the prognosis.

17. Jaw Wiring: Jaw wiring is a medical procedure used to treat certain conditions like obesity or jaw fractures. It involves securing the jaw in a closed position using wires to restrict mouth opening and limit food intake.

18. Jejunal Atresia: Jejunal Atresia is a congenital condition where there is a blockage or absence of a portion of the small intestine called the jejunum. It typically requires surgical intervention soon after birth to correct the obstruction and restore the normal function of the intestine.

19. Jellyfish Stings: Jellyfish stings occur when a person comes into contact with the tentacles of jellyfish, leading to skin irritation and pain. While most jellyfish stings are not life-threatening, some species can cause severe allergic reactions that require immediate medical attention.

20. Jerky Movements: Jerky movements can be a symptom of various neurological disorders, such as myoclonus or certain types of seizures. Proper diagnosis and treatment are essential to manage the underlying cause of these involuntary movements.

21. Jervell and Lange-Nielsen Syndrome: Jervell and Lange-Nielsen Syndrome is a rare genetic disorder that affects the heart’s electrical system, leading to a prolonged QT interval. This can cause life-threatening irregular heart rhythms. Treatment often involves medication and sometimes a pacemaker or implantable cardioverter-defibrillator (ICD) to manage the condition and prevent sudden cardiac arrest.

22. Jet Lag: Jet lag occurs when a person’s internal body clock is disrupted due to rapid travel across different time zones. Common symptoms include fatigue, insomnia, irritability, and digestive disturbances. Adjusting sleep patterns, exposure to sunlight, and staying hydrated can help minimize jet lag’s effects.

23. Jet Lag Disorder: Jet Lag Disorder is a more severe form of jet lag, characterized by persistent and distressing symptoms after long-distance travel. It may require specific interventions and lifestyle adjustments to readjust the body’s circadian rhythm.

24. Jeune Syndrome: Jeune Syndrome, also known as Asphyxiating Thoracic Dystrophy, is a rare genetic disorder that affects the development of bones, particularly the rib cage. This can lead to respiratory difficulties and other complications. Treatment focuses on managing respiratory symptoms and providing supportive care.

25. Job Syndrome: Job Syndrome, also known as Hyperimmunoglobulin E syndrome (HIES), is a rare immunodeficiency disorder characterized by recurring bacterial and fungal infections, eczema, and elevated levels of certain immunoglobulins. Management typically involves antimicrobial therapy and treating the associated symptoms.

26. Jock Itch: Jock itch, medically known as tinea cruris, is a fungal infection that affects the groin area, inner thighs, and buttocks. It causes a red, itchy rash and is commonly seen in athletes and individuals who sweat excessively. Antifungal creams are usually effective in treating this condition.

27. Jod-Basedow Syndrome: Jod-Basedow Syndrome is a rare condition characterized by the development of hyperthyroidism in individuals with an iodine deficiency. It is more likely to occur in regions where iodine levels are low and can be managed through medication or other therapies to regulate thyroid function.

28. Johnson Munson Syndrome: Johnson Munson Syndrome is an extremely rare genetic disorder with limited information available. It appears to be a combination of intellectual disability, facial abnormalities, and other developmental issues.

29. Johnson Syndrome: Stevens-Johnson Syndrome (SJS) is a severe and potentially life-threatening skin reaction, often triggered by certain medications or infections. It causes painful skin blistering and mucous membrane involvement, requiring immediate medical attention and hospitalization.

30. Joint Aspiration: Joint aspiration is a medical procedure that involves removing fluid from a joint using a needle and syringe for diagnostic or therapeutic purposes. It can help diagnose various joint conditions, relieve pain, and reduce swelling.

31. Joint Incision and Drainage: Joint incision and drainage are surgical procedures performed to treat certain joint infections or abscesses. The surgeon makes an incision to drain the accumulated fluid or pus, helping to alleviate pain and prevent further complications.

32. Joint Infection: A joint infection occurs when bacteria, viruses, or fungi enter a joint, causing inflammation and pain. Prompt diagnosis and treatment are essential to prevent joint damage and preserve joint function.

33. Joint Pain: Joint pain is a common symptom associated with various conditions, including arthritis, injuries, and infections. Treatment depends on the underlying cause and may involve pain relief medications, physical therapy, or other interventions.

34. Joint Replacement Surgery: Joint replacement surgery, such as hip or knee replacement, is a surgical procedure performed to replace damaged or arthritic joints with artificial implants. It aims to relieve pain and improve joint function, allowing individuals to regain mobility and quality of life.

35. Jordan’s Syndrome: Information about Jordan’s Syndrome is scarce, and its association with a medical condition is unclear. Further research is needed to understand this term better.

36. Joubert Syndrome: Joubert Syndrome is a rare genetic disorder that affects the brain’s development, leading to physical and cognitive disabilities. The condition is characterized by a specific brain malformation called the “molar tooth sign.” Treatment focuses on managing symptoms and providing supportive care.

37. JRA (Juvenile Rheumatoid Arthritis): Juvenile Rheumatoid Arthritis, also known as Juvenile Idiopathic Arthritis (JIA), is a chronic autoimmune inflammatory condition that affects children and adolescents. It causes joint pain, swelling, and stiffness and requires a multidisciplinary approach to manage symptoms and improve the child’s overall well-being.

38. Jumping Frenchmen of Maine Disorder: Jumping Frenchmen of Maine Disorder is a rare neurological condition characterized by an exaggerated startle reflex and heightened response to sudden stimuli. It is often associated with other neurological symptoms and requires individualized care and support.

39. Jumping Frenchmen of Maine Syndrome: Jumping Frenchmen of Maine Syndrome refers to the same condition mentioned above, the disorder involving an exaggerated startle reflex and heightened reactions to sudden stimuli.

40. Junctional Epidermolysis Bullosa: Junctional Epidermolysis Bullosa is a rare inherited skin disorder that causes fragile skin, leading to blisters and erosions with minimal friction or trauma. There is currently no cure for this condition, and treatment primarily focuses on wound care and symptom management.

41. Junctional Premature Depolarizations: Junctional Premature Depolarizations are abnormal heartbeats that originate in the atrioventricular (AV) junction of the heart. They can cause palpitations and may require medical evaluation to determine the underlying cause and appropriate management.

42. Jungle Rot (Tropical Ulcer): Jungle Rot, also known as Tropical Ulcer or Cutaneous Leishmaniasis, is a skin infection caused by the Leishmania parasite. It results in open sores and can be prevalent in tropical and subtropical regions. Treatment may involve medication and wound care.

43. Jungle Yellow Fever: Jungle Yellow Fever is a severe viral infection transmitted through mosquitoes. It can cause fever, jaundice, and bleeding tendencies. Vaccination is available for prevention, and travelers to endemic areas are advised to take precautions.

44. Juvenile Absence Epilepsy: Juvenile Absence Epilepsy is a type of epilepsy that primarily affects children and adolescents. It is characterized by brief episodes of altered consciousness and absence seizures. Anti-seizure medications are typically used to control the seizures.

45. Juvenile Arthritis: Juvenile Arthritis is an umbrella term for various forms of arthritis that develop in children and teenagers. The condition leads to joint inflammation, pain, and stiffness. Treatment aims to control symptoms and prevent joint damage.

46. Juvenile Chronic Polyarthritis: Juvenile Chronic Polyarthritis, also known as Systemic Juvenile Idiopathic Arthritis (SJIA), is a form of arthritis characterized by joint inflammation and systemic features like fever and rash. It requires early diagnosis and aggressive treatment to prevent complications.

47. Juvenile Dystonia: Juvenile Dystonia is a type of movement disorder that appears in childhood, leading to involuntary muscle contractions and abnormal movements. Management may involve medications, physical therapy, or surgical interventions.

48. Juvenile Enthesitis-Related Arthritis: Juvenile Enthesitis-Related Arthritis is a subtype of Juvenile Idiopathic Arthritis that primarily affects the entheses, which are areas where tendons and ligaments attach to bones. Early detection and treatment are essential to prevent joint damage and maintain functionality.

49. Juvenile Huntington’s Disease: Juvenile Huntington’s Disease is a rare and early-onset form of Huntington’s disease, a progressive neurodegenerative disorder. It affects children and adolescents and can lead to a range of neurological and cognitive symptoms.

50. Juvenile Idiopathic Arthritis (JIA): Juvenile Idiopathic Arthritis is the most common form of arthritis in children and teenagers. It is characterized by joint inflammation lasting for at least six weeks. Treatment aims to control symptoms and prevent complications.

51. Juvenile Macular Degeneration: Juvenile Macular Degeneration, also known as Stargardt Disease, is an inherited eye disorder that affects the central part of the retina (macula). It can cause progressive vision loss and currently has no cure. Supportive measures can help individuals adapt to visual changes.

52. Juvenile Myelofibrosis: Juvenile Myelofibrosis is a rare form of bone marrow disorder that affects children and adolescents. It leads to the replacement of healthy bone marrow with fibrous tissue, disrupting blood cell production. Treatment options may include medications, blood transfusions, or stem cell transplantation.

53. Juvenile Myelo Monocytic Leukemia (JMML): JMML is a rare and aggressive form of childhood leukemia that affects the bone marrow and blood. It requires specialized treatment, such as chemotherapy, hematopoietic stem cell transplantation (HSCT), or targeted therapies.

54. Juvenile Myoclonic Epilepsy: Juvenile Myoclonic Epilepsy is a common form of epilepsy that starts during adolescence. It is characterized by myoclonic seizures, brief involuntary muscle jerks. Anti-seizure medications are usually prescribed to manage the condition.

55. Juvenile Neuronal Ceroid Lipofuscinosis: Juvenile Neuronal Ceroid Lipofuscinosis, also known as Batten disease, is a rare genetic disorder that affects the nervous system. It leads to vision loss, seizures, cognitive decline, and motor impairment. There is currently no cure, and treatment focuses on symptom management and supportive care.

56. Juvenile Onset Diabetes: Juvenile Onset Diabetes, also known as Type 1 Diabetes, is a chronic condition where the body does not produce enough insulin. It requires daily insulin therapy and lifestyle adjustments to manage blood sugar levels.

57. Juvenile Polyp: Juvenile Polyps are non-cancerous growths that can develop in the gastrointestinal tract, particularly in the colon. While most juvenile polyps are benign, some may need to be removed to prevent complications.

58. Juvenile Primary Lateral Sclerosis: Juvenile Primary Lateral Sclerosis is a rare type of motor neuron disease that affects children and adolescents. It leads to progressive weakness and spasticity in the legs. Treatment mainly focuses on managing symptoms and maintaining mobility.

59. Juvenile Psoriatic Arthritis: Juvenile Psoriatic Arthritis is a type of Juvenile Idiopathic Arthritis that occurs in children with psoriasis, a skin condition. It can cause joint inflammation and skin lesions. Early diagnosis and treatment are vital to prevent joint damage.

60. Juvenile Rheumatoid Arthritis (JRA): Juvenile Rheumatoid Arthritis is another term used to describe Juvenile Idiopathic Arthritis (JIA), as mentioned earlier. It refers to a group of chronic arthritic conditions affecting children and adolescents.

61. Juvenile Spondylarthropathy: Juvenile Spondylarthropathy is a form of arthritis that affects the spine and other joints in children and teenagers. Treatment typically involves a combination of medications and physical therapy.

62. Juvenile-Onset Diabetes: Juvenile-Onset Diabetes is another term for Type 1 Diabetes, a condition that starts during childhood or adolescence. It requires insulin therapy to manage blood sugar levels.

63. Juvenile-Onset Still’s Disease: Juvenile-Onset Still’s Disease is a rare form of inflammatory arthritis that primarily affects children. It causes high fevers, rash, joint pain, and inflammation. Treatment may involve medications and symptom management.

64. Juxta Articular Nodule: A Juxta Articular Nodule is a benign growth that appears near a joint, often as a result of chronic inflammation or irritation. In most cases, these nodules do not require treatment unless they cause discomfort or interfere with joint function.

65. Juxtacortical Chondroma: Juxtacortical Chondroma is a benign tumor that develops on the surface of bones, typically near the cartilage. Surgical removal is often curative, and the prognosis is generally excellent.

66. Juxtaglomerular Apparatus Hyperplasia: Juxtaglomerular Apparatus Hyperplasia is a condition where the cells of the juxtaglomerular apparatus in the kidneys become overgrown. It can cause hypertension and may require medication to manage blood pressure.

67. Juxtapapillary Choroiditis: Juxtapapillary Choroiditis is an inflammatory eye condition that affects the choroid, a layer of blood vessels in the retina. It typically occurs near the optic nerve head, leading to vision disturbances and possible vision loss. Treatment aims to control inflammation and preserve vision.

I hope you found this article “Diseases That Start With J” helpful and got insights into some of the rare and lesser-known medical conditions.

Also, keep in mind that, this isn’t an exhaustive list, if there are any Diseases starting with the letter J.

Feel free to leave a comment below with the missing Disease and I’ll update the list as soon as possible.

And, if you’d like to explore more Diseases starting with different letters of the alphabet, click the link below:

  • Diseases That Start With K
  • Diseases That Start With L
  • Diseases That Start With M
  • Diseases That Start With N

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