TREACHER COLLINS SYNDROME. TREACHER COLLINS SYNDROME /MANDIBULOFACIAL DYSOSTOSIS /FRANCESCHETTI-ZWAHLEN-KLEIN SYNDROME / ZYGOAUROMANDIBULAR DYSPLASIA IS AN AUTOSOMAL DOMINANT CONGENITAL DISORDER CHARACTERISED BY CRANIOFACIAL DEFORMITIES INVOLVING EYES,EARS AND CHEEK BONES WITH NORMAL INTELLIGENCE. THE SYNDROME WAS NAMED AFTER EMINENT BRITISH OPHTHALMOLOGIST EDWARD TREACHER COLLINS WHO DESCRIBED IT. EMBRYOLOGY CRANIOFACIAL DYSMORPHIC IS DUE TO FAILURE OF NEURAL CREST CELLS TO MIGRATE INTO THE FIRST AND SECOND BRANCHIAL ARCHES LEADING TO HYPOPLASIA /APLASIA OF THE MUSCULOSKELETAL DERIVATIVES OF THESE ARCHES. THE CRITICAL PERIOD IS BETWEEN 6-7TH WEEK OF EMBRYO NALGONDA DEVELOPMENT. INHERITANCE OF TCS IS AUTOSOMAL DOMINANT WITH COMPLETE PENETRATE AND VARIABLE EXPRESSIVITY. TCS OCCURS DUE TO MUTATIONS IN TCOF1,POLR1CAND POLR1C GENES. CLINICAL FEATURES FACE CHARACTERISTIC DYSMORPHIC FACIES OF TCS ARE SYMMETRICAL AND BILATERAL. DOWNWARD SLOPING PALPEBRAL FISSURES. DEPRESSED CHEEK BONES. MALFORMED PINNA. DOWN TURNED MOUTH. RECEDING CHIN. SKULL HYPOPLASTIC MALAR BONES,ZYGOMATIC PROCESS OF FRONTAL BONE,LATERAL PTERYGIUM PLATES,PARANASAL SINUSES AND MANDIBULAR CONDYLES. MASTOIDS ARE NOT PNEUMATIZED. CRANIAL BASE IS PROGRESSIVELY KYPHOTIC. EYES DOWNWARD SLOPING PALPEBRAL FISSURES. COLOBOMA IN THE OUTER THIRD OF LOWER LID EARS MALFORMED PINNA. MEATAL ATRESIA STENOSIS /ATRESIA OF EXTERNAL AUDITORY CANAL. APLASIA /HYPOPLASIA OF MALLEUS, INCUS AND STAPES ANKYLOSIS OF STAPES CONDUCTIVE HEARING LOSS. MOUTH AND THROAT. CLEFT PALATE. APLASIA /HYPOPLASIA OF PAROTID. PHARYNGEAL HYPOPLASIA IS A CONSTANT FINDING. MENTAL STATUS NORMAL INTELLIGENCE. DEVELOPMENTAL DELAY DUE TO UNDIAGNOSED HEARING LOSS. DYSFUNCTIONAL SYMPTOMS. RETRO POSITIONED HYPOPLASTIC TONGUE. DIFFICULTIES IN FEEDING AND SWALLOWING. CONDUCTIVE HEARING LOSS. IMPAIRED VISION. PRENATAL DIAGNOSIS MIDTRIMESTER ULTRASOUND CAN DETECT FACIAL DYSMORPHOLIGY. FETAL CELLS VIA CHORIONIC VILLUS SAMPLING AT 10 WEEKS. AMNIOCENTESIS AT 16 WEEKS. POSTNATAL ASSESSMENT. OXYGEN SATURATION BY PULSE OXIMETER. ASSESSMENT OF FEEDING EFFICIENCY. AUDIOLOGICAL TESTING. NEUROOPHTHALMOLOGICAL ASSESSMENT. CRANIOFACIAL CT SCAN. GENETIC DIAGNOSIS BY GENETICIST. TREATMENT MULTIDISCIPLINARY APPROACH. AIRWAY INADEQUACY -TRACHEOSTOMY. SWALLOWING DIFFICULTY -GASTROSTOMY. CONDUCTIVE HEARING LOSS -HEARING AIDS. SURGICAL CORRECTION OF DEFORMITIES DONE ACCORDING TO PHYSIOLOGICAL NEED AND DEVELOPMENT. .
very good stuff for Pg students..
good illustration, thanks mam
Thanks for fine information madam
Good Revision.
Nice post .
We had diagnosed one during our Ophthalmology PG training and written a paper in Indian Journal of Ophthalmology way back in 1992-93.
Useful and informative.
thanks for sharing this informative post.....
Nice illustrations and helpful informative on TC syndrome. ..thanQ. Madam. ..
quick revision to all the syndromes
Cases that would interest you
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FTND Male. Micrognathia, large tongue, high arched palate, natal teeths. Diagnosis Pierre robin syndrome DD? Possible complications? Rx?
Dr. Rahul Patil14 Likes12 Answers - Login to View the image
any suggestions for this 5 year old pt with syndrome
Dr. Shahid Imran8 Likes17 Answers - Login to View the image
Guess the diagnosis of this Rare Case Doctors A 28-day-old male child was brought to the ophthalmology outpatient department with a complaint of redness in both eyes for the past 10 days. It was not associated with any discharge from either of the eyes. The patient was the first child of a 22-year-old woman who delivered at the same hospital at term. There was a history of delayed crying at birth. He was born of a nonconsanguinous marriage and the pedigree analysis revealed no other affected member in the family. The developmental milestones were age appropriate except for hearing deficit as he did not turn his head to sound. He was breast feeding with no difficulty in swallowing. The child was 37 cm long with a body weight of 3 kg. The skull was normal except for an open anterior fontanelle. The facial characteristics were bilaterally symmetrical but abnormal. There were multiple facial dysmorphic features including downward-slanting eyes, malar hypoplasia, mandibular hypoplasia (micrognathia), a large fishlike mouth (macrostomia) with a high arched palate . The tongue was retropositioned but the child had no difficulty in feeding and swallowing. The child had malformed and crumpled bilateral pinnae. The right ear had external auditory canal stenosis and left ear had external auditory canal atresia. He also had pectus carinatum and chest indrawing. Auscultation revealed vesicular breath sounds with prolonged expiration. The abdomen was scaphoid, and there was no other abnormality in the limbs, back, and genitals. The ophthalmological examination revealed antimongoloid slant of the palpebral fissures. The child had bilateral lower lid coloboma (lateral one third) with absence of eyelashes in the entire extent of the lower lids . The inferior conjunctiva was congested in both eyes with superficial haze of the inferior cornea (exposure keratopathy) Source- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5525627/
Dr. Vivek Jain3 Likes18 Answers - Login to View the image
diagnosis please .C/o recc vomiting from nose and mouth.
Dr. Yash Sharma5 Likes49 Answers - Login to View the image
ABC OF : HUNTER SYNDROME (MPS II) MUCOPOLYSACCHARIDOSIS etc. MAY BE HELPFUL. *** ALTERNATE NAMES : Hunter syndrome / IDS deficiency / Iduronate 2-sulfatase deficiency / MPS II / MPS2....... *** HUNTER SYNDROME, or mucopolysaccharidosis II (MPS II), is a lysosomal storage disease caused by a deficient (or absent) enzyme, iduronate-2-sulfatase (I2S). The accumulated substrates in Hunter syndrome are heparan sulfate and dermatan sulfate....... The syndrome has X-linked recessive inheritance....... *** CLINICAL FEATURES :- Cardiac disease Coarse facies Corneal clouding Developmental delays Dwarfism Dysostosis Hepatosplenomegaly Hernias IDS Mental retardation Mucopolysaccharidosis Optic atrophy Pigmentary retinopathy....... *** CLINICAL CHARACTERISTICS :- OCULAR FEATURES :- * CORNEAL CLOUDING may be noted as early as 6 months of age but is usually absent. When present it is milder than in some other forms of mucopolysaccharidosis. A pigmentary retinopathy with variable severity is often present. The disc may be elevated and appears swollen. Secondary optic atrophy may be seen in long standing cases. SYSTEMIC FEATURES :- * Mild to severe DEVELOPMENTAL DELAYS are common and MENTAL RETARDATION has been reported IN SOME cases. There is OFTEN 'PEBBLING' OF THE SKIN OVER THE NECK AND CHEST. * JOINT STIFFNESS, SHORT STATURE, and SKELETAL DEFORMITIES are common. * Many have short necks, a protuberant abdomen, a broad chest, and facial coarseness. * Hepatosplenomegaly, hearing loss, hernias, and carpal tunnel syndrome are OFTEN PRESENT. * The skull is large with a J-shaped sella, the vertebral bodies are hypoplastic anteriorly, the pelvis and femoral heads are hypoplastic and the diaphyses are expanded. ** A SEVERE FORM, TYPE A, has its ONSET in the first TWO TO FOUR YEARS OF LIFE, with more RAPID PROGRESSION AND DEATH commonly by adolescence. Many patients have OBSTRUCTIVE PULMONARY DISEASE and HEART FAILURE. ** The IDS deficiency is similar to that of TYPE B which is LESS SEVERE and compatible with life into the 7th decade. Intelligence is often normal in type B. GENETICS :- Hunter syndrome, or MPS II, is one of seven lysosomal enzyme deficiencies responsible for the degradation of mucopolysaccharides, and the only one known to be X-LINKED (Xq28). *** The mutation in IDS leads to a deficiency of iduronate sulfatase resulting in accumulation of dermatan and heparin sulfate. Rare affected females may have chromosomal deletions instead of a simple mutation in IDS. TREATMENT :- VARIOUS THERAPIES ARE UNDER DEVELOPMENT including enzyme replacement, gene transfers, and bone marrow transplantation. *** Human iduronate-2-sulfatase (Idursulfase) has been used with encouraging signs but it is too early to determine the long term effectiveness. ***** THERE IS NO CURE BUT treatments such as enzyme replacement THERAPIES CAN HELP make the disease more manageable. *** On July 24, 2006, the FDA granted marketing approval forELAPRASE (idursulfase), the first FDA approved enzyme replacement therapy for the treatment for MPS II, also known as Hunter syndrome....... ***** The LIFE EXPECTANCY of these individuals is 10 TO 20 YEARS. Individuals with mild MPS II also have a shortened lifespan, but they typically LIVE INTO ADULTHOOD and their intelligence is not affected. HEART DISEASE and AIRWAY OBSTRUCTION are MAJOR CAUSES OF DEATH in people with both types of MPS II.......
Dr. Puranjoy Saha14 Likes15 Answers
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