Diseases That Start With T

Diseases That Start With T

Today, we bring to you a guide to diseases that start with T.

The vast array of diseases that exist today make up a complicated aspect of human health and the field of medicine. Diseases can affect individuals of all ages, areas, and societies, and can lead to severe health concerns such as organ failure and premature death. They can derive from a variety of sources including infectious agents, lifestyle choices, or genetic predispositions. Diagnosis and management of diseases require the expertise of highly skilled medical professionals and innovative health technologies to improve patient outcomes.

Researching and categorizing medical conditions that start with every alphabet is a task that requires patience, diligence, and expertise. My approach was methodical, and I thoroughly scrutinized every medical term that I came across, categorizing the ailments systematically by the letter of the alphabet in which they belong.

So, let’s begin exploring this list of diseases starting with T!


106 Diseases That Start With T

And here’s the list of diseases that begin with T letter.

Thoracic Outlet Syndrome

Thoracic outlet syndrome occurs due to compression of the brachial plexus and subclavian vessels in the thoracic outlet, leading to pain and numbness in the upper limb. It can result from trauma, repetitive arm movements, or congenital abnormalities.


Testotoxicosis is a rare genetic disorder that causes early-onset puberty and accelerated growth in males. It is caused by a mutation in the luteinizing hormone receptor gene, resulting in excessive production of testosterone.


Telangiectasia refers to the dilatation of small blood vessels near the surface of the skin, leading to red or purple patches. It can be caused by exposure to radiation, chronic liver disease, or hereditary disorders.

Trismus Pseudocamptodactyly Syndrome

Trismus pseudocamptodactyly syndrome is a rare genetic disorder characterized by limited jaw movement (trismus) and finger contractures (pseudocamptodactyly). It is caused by mutations in the MYH8 gene.

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Tardive Dyskinesia

Tardive dyskinesia is a movement disorder caused by long-term use of antipsychotic medication. It is characterized by repetitive, involuntary movements of the face, tongue, and limbs. Treatment includes reducing or stopping the medication and using other medications to control symptoms.

Tufted Angioma

Tufted angioma is a rare vascular tumor that usually appears during infancy or childhood. It is characterized by reddish-blue nodules on the skin and can have associated overgrowth of tissue. Treatment options include surgery, laser therapy, and medications.


Thymoma is a tumor that arises from the thymus gland, located in the chest. It can be benign or malignant and symptoms may include chest pain, coughing, and difficulty breathing. Treatment involves surgery, radiation, and chemotherapy.

Thoracic Dysplasia-Hydrocephalus Syndrome

Thoracic dysplasia-hydrocephalus syndrome is a rare genetic disorder characterized by abnormal development of the chest and spine and enlargement of the brain’s fluid-filled spaces (hydrocephalus). It is caused by mutations in the DLL3 gene.

T-Cell Lymphoma

T-cell lymphoma is a cancer of the lymphatic system that arises from T-cells, a type of white blood cell. It can manifest as skin lesions, enlarged lymph nodes, and fever. Treatment options include chemotherapy, radiation, and stem cell transplant.

Testes Neoplasm

Testicular neoplasms are tumors that arise from the testes, the male reproductive organs. They can be benign or malignant and symptoms may include pain, swelling, and lumps in the testicles. Treatment involves surgery, radiation, and chemotherapy.

Transitional Cell Carcinoma

Transitional cell carcinoma is a type of cancer that arises from the transitional cells that line the bladder, ureters, and renal pelvis. It can cause symptoms such as blood in the urine, pain during urination, and frequent urination. Treatment involves surgery, radiation, and chemotherapy.


Toxoplasmosis is a parasitic infection caused by Toxoplasma gondii. It can be transmitted through contact with infected cat feces, undercooked meat, or contaminated soil. Symptoms may include flu-like symptoms, muscle aches, and fever. Treatment options include medications to control the infection.

Troyer Syndrome

Troyer syndrome is a rare genetic disorder characterized by a progressive form of spastic paraplegia, intellectual disability, and other developmental abnormalities. It is caused by mutations in the SPG20 gene.

Triplo X Syndrome

Triplo X syndrome is a genetic disorder that occurs when a female has three X chromosomes instead of the usual two. It can cause learning difficulties, developmental delays, and behavioral problems. Treatment options include therapies focusing on development and education.

Trichostasis Spinulosa

Trichostasis spinulosa is a condition characterized by small, keratin-filled bumps on hair follicles, particularly on the chest and back. It can be managed with topical or oral medications and laser hair removal.


Trachoma is a contagious bacterial infection that affects the eyes, leading to scarring and blindness. It is caused by Chlamydia trachomatis and transmitted through close contact with infected individuals or contaminated objects. Treatment includes antibiotics and improved hygiene practices.

Torsades de Pointes

Torsades de pointes is a life-threatening arrhythmia characterized by a twisting pattern on electrocardiograms (ECGs). It can lead to sudden cardiac arrest and may be caused by electrolyte imbalances, medications, or genetic abnormalities. Treatment includes medications to correct underlying causes and prevent recurrence.

Thalamic Syndrome

Thalamic syndrome, also known as Dejerine-Roussy syndrome, is a neurological condition characterized by persistent pain, numbness, and sensory disturbances on one side of the body. It is caused by a stroke or other damage to the thalamus, a region in the brain that processes sensory information. Treatment options include medications to control pain and physical therapy.

Typhoid Fever

Typhoid fever is a bacterial infection caused by Salmonella typhi. It is transmitted through contaminated food and water and causes symptoms such as fever, headache, and gastrointestinal problems. Treatment includes antibiotics and adequate hydration.

Tetrahydrobiopterin Deficiency

Tetrahydrobiopterin deficiency is a rare genetic disorder that affects the production of tetrahydrobiopterin, a cofactor involved in the synthesis of neurotransmitters. It can cause developmental delays, movement disorders, and abnormal brain function. Treatment involves supplementation of tetrahydrobiopterin and medications to control symptoms.

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A condition characterized by a fast resting heart rate, usually greater than 100 beats per minute.

Thalassemia minor

A genetic blood disorder that causes mild anemia.

Tricho-hepato-enteric syndrome

An extremely rare and inherited disorder that affects hair, liver, and intestine development.


A genetic disorder in which a person has three copies of a chromosome instead of two.

Trophoblastic Neoplasms

A type of cancer that develops in the cells that form the placenta.


An inherited bleeding disorder that affects the ability of platelets to function properly.

Tropical spastic paraparesis

A neurological disorder caused by a virus that affects the spinal cord and leads to progressive weakness in the legs.

Tooth decay

The destruction of tooth tissue caused by bacteria that produce acid.

Tangier disease

An inherited disorder that affects the body’s ability to transport cholesterol.

Tennis elbow

A repetitive strain injury that affects the tendons in the elbow and causes pain.


A parasitic disease that is caused by eating raw or undercooked meat that is infected with Trichinella larvae.


A genetic disorder in which a person has three sets of chromosomes instead of two.

Tetrasomy X

A chromosomal abnormality that affects females and is caused by a duplication of the X chromosome.

Taybi syndrome

A rare genetic disorder that affects skeletal development and causes intellectual disability.

Thalassemia major

A genetic blood disorder that causes severe anemia and requires lifelong blood transfusions.


A bacterial infection that spreads through contaminated food and water.

Toxic shock syndrome

A rare but potentially life-threatening bacterial infection that affects multiple organ systems.

Triatrial heart

A rare congenital heart defect in which the heart has three atria instead of two.

Tay syndrome ichthyosis

A rare genetic disorder that affects the skin and causes scaly patches.

Tuberous Sclerosis

A genetic disorder that causes noncancerous tumors to develop in many different organs.


A rare neurological disorder that causes severe eye pain and paralysis.

Thiolase deficiency

A rare genetic disorder that affects how the body processes certain fats and can cause muscle weakness and brain damage.


A rare inherited disorder that affects the development of the limbs and causes abnormal hands and feet.


A condition in which the hair becomes brittle and breaks easily.

Transverse myelitis

A neurological disorder caused by inflammation of the spinal cord that can lead to paralysis.

Triple A syndrome

An inherited disorder that affects the adrenal glands and causes neurological and digestive problems.


A rare genetic disorder that causes a malformation of the skull and facial bones.


A blood disorder that affects the production of hemoglobin and can cause anemia.


A mass or lump found in any part of the body, which can be identified as benign or malignant by undergoing several tests.

Tietz syndrome

A rare genetic condition that affects hearing loss and pigmentation.

Triploid Syndrome

A genetic disorder causing intellectual disabilities, slow growth, and distinct physical features.

Turcot syndrome

A rare genetic condition that increases the risk of getting a brain tumor called glioblastoma.

Tongue neoplasm

A cancerous growth found on the tongue that can lead to difficulty in speaking, swallowing, and chewing.


A disorder affecting the hair, skin, and nails causing brittle or slow-growing hair.


A rare inherited disorder affecting hearing, vision, and nerve issues.

Tucker syndrome

A condition that mainly affects the eyes causing vision issues, seizures, and speech difficulties.


A rare metabolic disorder characterized by a fishy odor especially when sweating or after consuming choline-rich foods.


An inherited disease resulting in long-lasting fever, muscle pain, and inflammation of the eyes.

Tay-Sachs disease

A fatal genetic disorder that affects the nervous system causing developmental delays and progressive muscle weakness.

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Thymic carcinoma

A rare cancer originating in the thymus gland located on the upper part of the chest.

Thrombocytopenia purpura

A bleeding disorder caused by low platelet levels in the blood, resulting in purplish or reddish skin blotches.

Thyroglossal tract cyst

A benign cyst arising from the remnants of the thyroid gland.


A genetic disorder that results in the accumulation of amino acid tyrosine in the body.


A rare congenital respiratory condition that causes damage to the trachea and bronchi leading to breathing difficulties.


A type of anxiety disorder where an individual develops an intense fear of death or the dying process.

Thymus neoplasm

A relatively rare tumor in the thymus gland that may cause symptoms such as chest pain, shortness of breath, and coughing.

Taste disorder

A sensory disorder where an individual cannot perceive taste or differentiate between various tastes.

Tuberculous uveitis

An eye inflammation or uveitis caused by Mycobacterium tuberculosis.

Triosephosphate isomerase deficiency

A genetic disorder affecting red blood cells resulting in anemia, jaundice, and developmental delays.

Toluene antenatal infection

A toxic effect on the unborn fetus following exposure to the solvent toluene during pregnancy.


A ringing, hissing, or buzzing noise in the ear that is not related to any external sound source.


A rare and severe skin reaction to certain medications causing large areas of skin to blister and peel off.


A fungal infection that can cause infections in humans, particularly in immunocompromised individuals.


A parasite infection caused by roundworms present in soil or animal feces that may cause fever, headache, and asthma.

Trigeminal neuralgia

A chronic pain condition affecting the trigeminal nerve, causing severe facial pain and discomfort.

Temporomandibular joint dysfunction

A disorder that affects the jaw and muscles controlling jaw movements, leading to pain and restricted jaw movement.

Treponema infection

A bacterial infection caused by Treponema bacteria, which may cause several diseases such as syphilis, bejel, and yaws.


An oral and dental abnormality that enlarges the pulp chamber of the teeth.

Takayasu arteritis

A rare disease that causes inflammation in the walls of the arteries.


A common fungal infection that causes white patches in the mouth and throat.

Toxic conjunctivitis

A contagious eye infection that causes redness, swelling and discharge.


A rare genetic disorder that affects facial features and bone development.

Tremor hereditary essential

A neurological condition that causes involuntary shaking of the hands, head or voice.


A bacterial infection that primarily affects the lungs and results in coughing, chest pain, and fever.


A potentially life-threatening bacterial infection that can be spread to humans by infected animals, especially rabbits.

Trophoblastic tumor

A type of tumor that can grow in the cells that form the placenta during pregnancy.


A bacterial infection spread by fleas, lice or mites that causes fever, headache and rash.


A condition that involves a twisting or tilting of the neck that can cause neck pain and difficulty moving the head.


A parasitic infection caused by a type of tapeworm that can live in the human intestine.


A parasitic skin condition caused by fleas that burrow into the skin to lay eggs.

Trigger finger

A condition that causes one or more fingers to become stuck in a bent position.

TAR syndrome

A rare genetic disorder that affects blood clotting and bone development.


A parasitic infection caused by eating raw or undercooked meat from animals infected with Trichinella larvae.


An infection of the tonsils that can cause sore throat, difficulty swallowing or breathing.


A sexually transmitted infection caused by a parasite that can cause itching, burning or discharge.

Thyroid cancer

A type of cancer that starts in the cells of the thyroid gland.


A condition that affects the shape of the skull, causing a triangular appearance.


A serious bacterial infection caused by Clostridium tetani that affects the nervous system and can result in muscle stiffness, seizures, and even death.

TORCH syndrome

A group of viral and bacterial infections that can affect a developing fetus in the womb.

Twin-to-twin transfusion syndrome

A complication of identical twin pregnancies that can occur when the blood flow between the twins is imbalanced.

Tsukuhara syndrome

A rare condition that affects the skin and causes redness, swelling, and hardening.


A condition that involves low levels of T cells in the blood, which can impair the immune system.

Treacher Collins syndrome

A genetic disorder that affects the development of facial bones and can cause a range of physical abnormalities.

Tourette syndrome

A neurological disorder that causes repetitive, involuntary movements and vocalizations.

Tricyclic antidepressant overdose

An overdose of drugs used to treat depression that can cause a range of symptoms, from dizziness to rapid heartbeat and seizures.


A genetic blood disorder that affects the production of hemoglobin, which can cause anemia and other health problems.

Wrapping Up

And that’s our list of T diseases.

As I started compiling the list of diseases that begins with every alphabet, I realized how vast and complex the world of medical conditions is. It required meticulous research, attention to detail and an extensive database of medical terminologies to come up with a comprehensive list that covered all possible diseases for each alphabet.

As we come to the end of our analysis on the topic of diseases, it is evident that they have a far-reaching impact on human health, society, and economies. They erode quality of life and burden healthcare systems, which can lead to long-term suffering and economic losses. Therefore, it’s important for individuals, communities, and governments to work together in addressing this challenge.

Hope this post on diseases beginning with T alphabet has been useful to you!