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Familial colorectal cancer
Familial colon cancer is a cluster of colon cancer within a family. Most cases of colon cancer occur sporadically in people with little to no family history of the condition. Approximately 3-5% of colon cancer is considered “hereditary” and is thought to be caused by an inherited predisposition to colon cancer that is passed down through a…
Ovarian sex cord tumor with annular tubules
An ovarian sex cord tumor with annular tubules (SCTAT) is a tumor that grows from cells in the ovaries known as sex cord cells. As these cells grow, they form tube-like shapes in the tumor.[1] SCTATs can develop in one or both ovaries, and may cause symptoms such as puberty at an exceptionally young age (precocious…
Cone-rod dystrophy 2
Cone-rod dystrophy 2 (CORD2) is an inherited eye disorder that affects the rod and cone cells in the retina. These cells process light and allow people to see the accurate shape and color of objects.[1] Initial signs and symptoms of CORD2 usually occur in early childhood or late adolescence and include decreased sharpness of vision (visual…
Transaldolase deficiency
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 101028 Definition Transaldolase deficiency is an inborn error of the pentose phosphate pathway that presents in the neonatal or antenatal period with hydrops fetalis, hepatosplenomegaly, hepatic dysfunction, thrombocytopenia, anemia, and renal and cardiac abnormalities. Epidemiology…
PARC syndrome
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 2825 Definition PARC syndrome is a rare genetic developmental defect during embryogenesis syndrome characterized by the association of congenital poikiloderma (P), generalized alopecia (A), retrognathism (R) and cleft palate (C). There have been no further…
Trigonocephaly bifid nose acral anomalies
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 3368 Definition A rare multiple congenital anomalies/dysmorphic syndrome characterized by trigonobrachycephaly, facial dysmorphism (including narrow forehead, upward-slanting palpebral fissures, bulbous nose with slightly bifid tip, macrostomia with thin upper lip, micrognathia), and various acral anomalies,…
Congenital hepatic fibrosis
Congenital hepatic fibrosis is a rare disease of the liver that is present at birth. Symptoms include the following: a large liver, a large spleen, gastrointestinal bleeding caused by varices, increased pressure in the blood vessels that carry blood to the liver (portal hypertension), and scar tissue in the liver (fibrosis). Isolated congenital hepatic fibrosis is…
Congenital pulmonary alveolar proteinosis
Congenital pulmonary alveolar proteinosis is a rare form of respiratory failure that is present from birth.[1] In this condition, a substance made up of fat and protein (surfactant) builds up in the air sacs (alveoli) of the lungs, making breathing difficult.[1] Symptoms typically begin the newborn period and get worse over time. Congenital pulmonary alveolar proteinosis…
Congenital toxoplasmosis
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 858 Definition Congenital toxoplasmosis (CTX) is an embryo-fetopathy characterized by ocular, visceral or intracranial lesions secondary to maternal primo-infection by Toxoplasma gondii (Tg). Epidemiology Given its infectious origin, incidence of CTX is variable over time…
Rutherfurd syndrome
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 2709 Definition Oculodental syndrome, Rutherfurd type is a rare genetic disorder that is primarily characterized by the classical triad of gingival fibromatosis, non-eruption of tooth and corneal dystrophy (bilateral corneal vascularization and opacity). Abnormally shaped…
Leigh syndrome, French Canadian type
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 70472 Definition Saguenay-Lac-St. Jean (SLSJ) type congenital lactic acidosis, a French Canadian form of Leigh syndrome (see this term), is a mitochondrial disease characterized by chronic metabolic acidosis, hypotonia, facial dysmorphism and delayed development. Epidemiology…
Crystal arthropathies
Crystal arthropathies are a diverse group of bone diseases associated with the deposition of minerals within joints and the soft tissues around the joints. The group includes gout, basic calcium phosphate and calcium pyrophosphate dihydrate deposition diseases, and, in very rare cases, calcium oxalate crystal arthropathy which is a rare cause of arthritis characterized by…
Cystic medial necrosis of aorta
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 229 Definition Familial aortic dissection is the term used to describe rupture of the aortic wall at the level of the media, resulting in the formation of a false channel and deviation of part of…
Holt-Oram syndrome
Holt-Oram syndrome affects the bones of the hands and arms and may also affect the heart. People with Holt-Oram syndrome have at least one bone in the wrist that did not form (develop) normally. Other bones in the hands, arms, and shoulder may also have developed abnormally. Many of these developmental changes in the bones can…
Dandy-Walker malformation with postaxial polydactyly
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 1566 Definition Dandy-Walker malformation with postaxial polydactyly syndrome is a syndromic disorder with, as a major feature, the association between Dandy-Walker malformation and postaxial polydactyly. The Dandy-Walker malformation has a variable expression and is characterized…
Septo-optic dysplasia spectrum
Septo-optic dysplasia is a disorder of early brain and eye development. The most common features are underdevelopment (hypoplasia) of the eye (optic) nerve, abnormal formation of structures along the midline of the brain such as the absence of the septum pellucidum and the corpus callosum, and a small pituitary (pituitary hypoplasia). Signs and symptoms may…
Fountain syndrome
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 3219 Definition Fountain syndrome is an extremely rare multi-systemic genetic disorder characterized by intellectual disability, deafness, skeletal abnormalities and coarse facial features. Epidemiology The syndrome is exceedingly rare and has been reported in only a…
Farber disease
Farber disease is an inherited lipid storage disease in which an excess amount of fat builds up in the joints, tissues, and central nervous system. Symptoms of Farber disease include a hoarse voice or weak cry, small lumps of fat under the skin and in other tissues (lipogranulomas), and swollen and painful joints. Other symptoms may…
Xp22.3 microdeletion syndrome
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 1643 Definition Xp22.3 microdeletion syndrome is a microdeletion syndrome resulting from a partial deletion of the chromosome X. Phenotype is highly variable (depending on length of deletion), but is mainly characterized by X linked ichthyosis,…
Gerstmann syndrome
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 221117 Definition Gerstmann syndrome is a very rare neurological disorder characterized by the specific association of acalculia, finger agnosia, left-right disorientation, and agraphia, which is supposed to be secondary to a focal subcortical white matter…
Landau-Kleffner syndrome
Landau-Kleffner syndrome (LKS) is a rare neurological syndrome characterized by the sudden or gradual development of aphasia (the inability to understand or express language) and recurrent seizures (epilepsy). Children with LKS typically develop normally until signs and symptoms of the syndrome begin to develop between age 2 and 8 years.[1][2] Males are more often affected by LKS than females.[1] In…
Die Smulders Vles Fryns syndrome
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Acrocephalopolydactyly
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 221054 Definition An extremely rare lethal autosomal recessive disorder characterized by massive birth weight, swollen globular body, generalized edema, short limbs, postaxial polydactyly, thick skin, facial dysmorphism (slanted palpebral fissures, hypertelorism, epicanthic folds, dysplastic ears),…
Diffuse dermal angiomatosis
Diffuse dermal angiomatosis is a rare condition in which purplish patches develop in the skin, most often on the legs, though they may occur in other areas of the body.[1] Sometimes these purple patches can become open wounds in the skin (ulcerations), which may be painful. This condition occurs when cells that line blood vessels…
Acropectorovertebral dysplasia F form
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 957 Definition A rare skeletal dysplasia characterized by fusion of the carpal and tarsal bones, with complex anomalies of the fingers and toes (preaxial polydactyly of the hands and/or feet, syndactyly of fingers and toes,…
Dissecting cellulitis of the scalp
Dissecting cellulitis of the scalp is a rare and severe form of scalp folliculitis. It is sometimes associated with acne conglobata, hidradenitis suppurativa and spinal arthritis. Signs and symptoms of this condition include lardge nodules and cysts as well as smaller follicular papules. Hair loss occurs over the affected region and permanent scarring and bald…
Acute necrotizing encephalopathy
Acute necrotizing encephalopathy (ANE) is a rare disease characterized by brain damage (encephalopathy) that usually follows an acute febrile disease, mostly viral infections.[1]. Most of the reported cases are from previously healthy Japanese and Taiwanese children, but it is now known that the disease may affect anybody in the world. The symptoms of the viral infection…
Down syndrome
Down syndrome is a chromosome disorder associated with intellectual disability, a characteristic facial appearance, with small nose and an upward slant to the eyes, and low muscle tone in infancy.[1][2] The degree of intellectual disability varies from mild to moderate. People with Down syndrome may also be born with various health concerns such as heart…
Dyschondrosteosis nephritis
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 1765 Definition Dyschondrosteosis nephritis is characterized by the association of short stature due to mesomelic shortening of the limbs and Madelung deformity (see this term), with hereditary nephritis. Epidemiology It was originally described in male…
Adrenomyeloneuropathy
Adrenomyeloneuropathy (AMN) is an inherited condition that affects the spinal cord. It is a form of X-linked adrenoleukodystrophy. On average, people with AMN begin to develop features in the late twenties. Signs and symptoms may include progressive stiffness and weakness of the legs; ataxia; speech difficulties; adrenal insufficiency; sexual dysfunction; and bladder control issues. Some people with…
Thakker-Donnai syndrome
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 1780 Definition Thakker-Donnai syndrome is a rare, genetic, lethal, multiple congenital anomalies/dysmorphic syndrome characterized by facial dysmorphism (including long, downward slanting palpebral fissures, hypertelorism, posteriorly rotated ears, broad nasal bridge, short nose with a bulbous…
Desmoid tumor
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 873 Definition A desmoid tumor (DT) is a benign, locally invasive soft tissue tumor associated with a high recurrence rate but with no metastatic potential. Epidemiology DTs account for < 3% of soft tissue tumors….
Familial encephalopathy with neuroserpin inclusion bodies
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 85110 Definition A rare serpinopathy characterized by progressive myoclonus epilepsy and/or pre-senile dementia with prominent frontal-lobe features and relative sparing of recall memory. In addition, other neurological manifestations like cerebellar symptoms and pyramidal signs may…
ALG8-CDG (CDG-Ih)
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 79325 Definition A form of congenital disorders of N-linked glycosylation that is characterized by gastrointestinal symptoms (diarrhea, vomiting, feeding problems with failure to thrive, protein-losing enteropathy), edema and ascites (including hydrops fetalis), hepatomegaly, renal tubulopathy,…
Fucosidosis
Fucosidosis is a lysosomal storage disease that affects many areas of the body, especially the brain. Affected individuals have intellectual disability that worsens with age, and many develop dementia later in life. People with this condition often have delayed development of motor skills such as walking, and the skills they do acquire often deteriorate over time….
Galactose epimerase deficiency
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 79238 Definition A very rare, moderate to severe form of galactosemia characterized by moderate to severe signs of impaired galactose metabolism. Epidemiology Overall prevalence is not known but the disorder is thought to be very…
Apparent mineralocorticoid excess
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Essential fructosuria
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 2056 Definition Essential fructosuria is a rare autosomal recessive disorder of fructose metabolism (see this term) caused by a deficiency of fructokinaseenzyme activity. It is characterized by elevated fructosemia and presence of fructosuria following ingestion…
Membranous nephropathy
Membranous nephropathy is a kidney disease characterized by inflammation of the structures inside the kidney that help filter wastes and fluids.[1] When the glomerular basement membrane becomes thickened, it does not work normally, allowing large amounts of protein to be lost in the urine. Symptoms develop gradually and may include swelling, fatigue, weight gain, and…
Familial congenital palsy of trochlear nerve
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 91498 Definition Familial congenital palsy of trochlear nerve is a rare, genetic, neuro-ophthalmological disease characterized by congenital fourth cranial nerve palsy, manifesting with hypertropia in side gaze, unexplained head tilt, acquired vertical diplopia, and progressive…
Klippel-Trenaunay syndrome
Klippel-Trenaunay syndrome (KTS) is a syndrome that affects the development of blood vessels, soft tissues, and bones. This syndrome has three characteristic features: a red birthmark called a port-wine stain, overgrowth of soft tissues and bones, and vein malformations such as varicose veins or malformations of deep veins in the limbs. The overgrowth of bones and soft…
Familial thoracic aortic aneurysm and aortic dissection
Familial thoracic aortic aneurysm and aortic dissection (Familial TAAD) is a rare condition that affects the aorta (the large blood vessel that distributes blood from the heart to the rest of the body). In people affected by this condition, the thoracic aorta (the upper part of the aorta, near the heart) may become weakened, stretched…
Hyperparathyroidism-jaw tumor syndrome
Hyperparathyroidism-jaw tumor syndrome (HPT-JT) is an inherited condition that causes overactivity of the parathyroid glands (hyperparathyroidism). These glands regulate the body’s use of calcium, so overactivity can lead to high calcium levels in the blood (hypercalcemia). The syndrome typically begins in late adolescence or early adulthood. The hyperparathyroidism in people with HPT-JT is usually caused by a…
Primary spontaneous pneumothorax
Primary spontaneous pneumothorax is an abnormal accumulation of air in the pleural space (the space between the lungs and the chest cavity) that can result in the partial or complete collapse of a lung. It is called primary because it occurs in the absence of lung disease such as emphysema and spontaneous because the pneumothhorax…
Bell’s palsy
Bell’s palsy is a form of temporary facial paralysis which results from damage or trauma to one of the facial nerves. This disorder is characterized by the sudden onset of facial paralysis that often affects just one side and can cause significant facial distortion. Symptoms vary, but may include twitching, weakness, drooping eyelid or corner of…
Siegler Brewer Carey syndrome
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Fibrodysplasia ossificans progressiva
Fibrodysplasia ossificans progressiva (FOP) is a disorder in which skeletal muscle and connective tissue, such as tendons and ligaments, are gradually replaced by bone (ossified). This condition leads to bone formation outside the skeleton (extra-skeletal or heterotopic bone) that restricts movement. This process generally becomes noticeable in early childhood, starting with the neck and shoulders and moving down the body…
Arginase deficiency
Arginase deficiency is an inherited metabolic disease in which the body is unable to process arginine (a building block of protein).[1][2] It belongs to a group of disorders known as urea cycle disorders. These occur when the body’s process for removing ammonia is disrupted, which can cause ammonia levels in the blood to rise (hyperammonemia). In…
Hemifacial microsomia
Hemifacial microsomia (HFM) is a condition in which part of one side of the face is underdeveloped and does not grow normally. The eye, cheekbone, lower jaw, facial nerves, muscles, and neck may be affected.[1][2][3] Other findings may include hearing loss from underdevelopment of the middle ear; a small tongue; and macrostomia (large mouth).[3] HFM…
Free sialic acid storage disease
Free sialic acid storage diseases are inherited conditions that lead to progressive neurological damage. There are three forms of free sialic acid storage diseases; an infantile form, an intermediate severe form and Salla disease. The infantile form is the most severe, with symptoms appearing before birth or soon after. Salla disease is the least severe…
GM1 gangliosidosis type 2
GM1 gangliosidosis is an inherited lysosomal storage disorder that progressively destroys nerve cells (neurons) in the brain and spinal cord. The condition may be classified into three major types based on the general age that signs and symptoms first appear: classic infantile (type 1); juvenile (type 2); and adult onset or chronic (type 3). Although…
Rhabdoid tumor
Rhabdoid tumor (RT) is an aggressive pediatric soft tissue sarcoma that arises in the kidney, the liver, the peripheral nerves and all miscellaneous soft-parts throughout the body. RT involving the central nervous system (CNS) is called atypical teratoid rhabdoid tumor. RT usually occurs in infancy or childhood. In most cases, the first symptoms are linked…
Gemignani syndrome
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 2074 Definition Gemignani syndrome is a rare neurodegenerative disease characterized by slowly progressive ataxia, amyotrophy of the hands and distal arms, spastic paraplegia, progressive sensorineural hearing loss, hypogonadism and short stature. Additional features include generalized…
Brachyolmia type 3
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 93304 Definition A relatively severe form of brachyolmia, a group of rare genetic skeletal disorders, characterized by short-trunked short stature, platyspondyly and kyphoscoliosis. Degenerative joint disease (osteoarthropathy) in the spine, large joints and interphalangeal joints…
Globozoospermia
Globozoospermia is a rare form of male infertility. Men affected by this condition have abnormal sperm with a round (rather than oval) head and no acrosome (a cap-like covering which contains enzymes that break down the outer membrane of an egg cell). As a result of these abnormalities, the sperm are unable to fertilize an…
Spinocerebellar ataxia autosomal recessive 3
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Osteopetrosis autosomal recessive 1
Osteopetrosis refers to a group of rare, inherited skeletal disorders characterized by increased bone density and abnormal bone growth.[1][2] Symptoms and severity can vary greatly, ranging from neonatal onset with life-threatening complications (such as bone marrow failure) to the incidental finding of osteopetrosis on X-ray. Depending on severity and age of onset, features may include fractures, short stature,…
Granuloma annulare
Granuloma annulare (GA) is skin disorder that most often causes a rash with red bumps (erythematous papules) arranged in a circle or ring pattern (annular).[1][2][3] GA is not contagious and is not cancerous.[2] The rash may be localized or generalized. Localized GA is the most common form of GA (75% of the cases) and usually…
Posterior column ataxia with retinitis pigmentosa
Posterior column ataxia with retinitis pigmentosa (PCARP) is a genetic condition that affects vision and the nervous system. It is characterized by a loss of cells in the light sensitive tissue in the back of the eye (retinitis pigmentosa), abnormalities in the body’s unconscious perception of movement and spatial orientation (proprioception), and muscle weakness and…
Mastocytosis cutaneous with short stature conductive hearing loss and microtia
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 2135 Definition Hennekam-Beemer syndrome is characterized by the association of skin mastocytosis (appearing as diffuse pigmentation), short stature, microcephaly, conductive hearing loss, and dysmorphic features. It has been described in only two (female) cases: one…
Bannayan-Riley-Ruvalcaba syndrome
Bannayan-Riley-Ruvalcaba syndrome (BRRS) is a genetic condition that leads to the growth of both non-cancerous and cancerous tumors. Symptoms of BRRS may include large head size, increased birth weight, developmental delay, and intellectual disability. Other symptoms include the appearance of non-cancerous tumors in the digestive system, fatty tumors under the skin, and freckles on the…
Barrett esophagus
Barrett esophagus is a condition in which the lining of the esophagus (the tube that carries food from the throat to the stomach) is replaced by tissue that is similar to the lining of the intestines. Although this change does not cause any specific signs or symptoms, it is typically diagnosed in people who have…
Brachydactyly type A1
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 93388 Definition Brachydactyly type A1 (BDA1) is a congenital malformation characterized by apparent shortness (or absence) of the middle phalanges of all digits, and occasional fusion with the terminal phalanges. Epidemiology Only a few pedigrees…
Camptocormism
Camptocormia, camptocormism or “bent spine syndrome,” (BSS) is an extreme forward flexion of the thoracolumbar spine, which often worsens during standing or walking, but completely resolves when laying down. The term itself is derived from the Greek “kamptos” (to bend) and “kormos” (trunk) BSS was initially considered, especially in wartime, as a result of a psychogenic…
Biemond syndrome 2
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Right ventricle hypoplasia
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 439 Definition Isolated right ventricular hypoplasia (IRVH) is a rare congenital heart malformation (see this term) characterized by underdevelopment of the right ventricle associated with patent foramen ovale or interauricular communication (see these terms) and…
Blepharoptosis myopia ectopia lentis
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs. Orpha Number: 1259 Definition This syndrome is characterised by bilateral congenital blepharoptosis, ectopia lentis and high myopia. Epidemiology It has been described in three members of one family (in a mother and her two daughters). Genetic counseling…
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