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Tuberous Sclerosis in Early Infancy: a Case Report H

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Tuberous Sclerosis in Early Infancy: a Case Report H Brief Report Tuberous Sclerosis in Early Infancy: A Case Report H. John Blossom, MD Fresno, California The diagnosis of tuberous sclerosis in an infant was de­ sclerosis contributed to the delay. A brief review of the layed by 3 months. Failure to take an adequate padent case and the diagnosis of tuberous sclerosis is presented. history because of a language barrier between parents and Key words: Tuberous sclerosis; seizures; infant care. caregivers and to observe the classic stigmata of tuberous / Pam Proa 1993; 36:344-346. The occurrence of seizures in an infant is a frightening evaluation was apparently delayed because of a diagnosis experience for parents and physicians alike. In this case of persistent otitis media, which required repeat admin­ report important historical information and unique phys­ istrations of antibiotics. ical findings arc described that helped determine the During the infant’s 4th month of life, several visits cause of seizures in a 4-month-old infant. to physicians were made for fussiness and fever. Otitis media was diagnosed several times. In addition, the par­ ents observed and reported an abnormality in the baby’s Case Report behavior that they described in Spanish as ataques, a term commonly used to describe fits or seizures. During clin­ The infant weighed 9 lb 3 oz at birth. His mother had an ical encounters interpreters translated conversations be­ uncomplicated prenatal course and an uneventful deliv­ tween the physicians and the parents. Because the ataques ery. The infant’s Apgar scores were 8/8 at 1 and 5 were of very brief duration and no abnormal physical minutes. His parents, Spanish-speaking immigrants from findings were noted, the physicians concluded that the Mexico, had two other healthy children. The family parents were observing normal infantile movements. received all their medical care at a multiresidcncy teach­ ing hospital. The ataques continued, however. The parents be­ came very distressed and sought a second opinion at out During a well-child visit at 6 weeks of age, vitiligo family practice clinic. During the examination of the now was noted in the infant’s chart. The physician described 41/2-month-old child, a 5-minute series of repetitive my­ several small “cafc-au-lait-likc spots [that] failed criteria oclonic jerks occurred. Although the child was afebrile in number and size.” The remainder of the history and the decision was made to test for meningitis so that it physical examination was unremarkable. could be ruled out as a cause of the seizures. At 2 months of age, the baby was admitted to the During the process of lumbar puncture and blood hospital for treatment of a relatively uncomplicated bout collection, further historical data were gathered by a of respiratory syncytial virus (RSV) bronchitis during a Spanish-speaking physician. The father reported that the community-wide outbreak. He was discharged after 2 infant jerked at times as if shocked (“brincar como tocado days. No observations of abnormal behavior or unusual con electricidatK) and he vividly demonstrated a full-body cutaneous findings were noted. At a postdischarge fol­ low-up visit, he was found to be well except for bilateral myoclonic jerk. The baby appeared agitated but not ill. otitis media, for which an antibiotic was prescribed. The physician noted that a 2-cm patch of the infant’s One month later, a physician recorded in the infant’s scalp hair was white. Several cafe-au-lait spots of approx­ chart the appearance of ash-lcaf-shaped spots and sug­ imately 1 to 2 cm were observed, as were two hypopig- gested that tuberous sclerosis be considered. Further mented oval macules of 6 to 8 cm in length. A tentative diagnosis of tuberous sclerosis was made. Administration of phenobarbital and antibiotics was Submitted, revised, November 24, 1992. begun. Laboratory data were entirely normal; however, a From the Department o f Family Practice, University o f California, San Francisco. computed tomography (CT) scan of the head demon­ Requests for reprints should be addressed to H . John Blossom, M D , 2615 E Clinton A ve strated multiple focal paraventricular calcifications con­ Fresno, G4 93703. sistent with tuberosous sclerosis. An ophthalmologic © 1993 Appleton & Lange ISSN 0094-3509 344 The lournal of Family Practice, Vol. 36, No. 3, 1993 Tuberous Sclerosis Blossom consultation confirmed hypopigmentation of the right rosis has traditionallv been described as one of the pha- optic disc and a right retinal astrocytic hamartoma. A komatoses or neurocutancous syndromes.4-8 The pediatric neurologist observed six ash-leaf-shaped spots. hallmark lesions arc fibroangiomas, or tubers, that vary in \n electroencephalogram (EEG) was normal. The child size and location. A varietv of other associated skin tvas discharged 2 days after admission, having had no lesions arc discussed below. Central nervous system fi­ more myoclonic jerks. broadenomas become calcified and may cause focal or The parents met with the family practice team before generalized seizures and, in some cases, hydrocephalus. discharging the infant. They expressed anger at the doc­ Retinal hamartomas arc pathognomonic, and their radio- tors who had not discovered their infant’s “infection.” graphic appearance has been likened to candle wax drip­ Although they were carefully informed in Spanish that pings or guttcrings. So-called mulberry tumors or pha- the infant was not suffering from an infection and was komas are noted on the retina. Half of affected children not contagious, they did not understand the genetic arc reported to have rhabdonwomas of the heart. There explanation for their son’s symptoms. They had recog­ is also a very high incidence of renal tumors, and lung nized pigmentary changes when the child was a few lesions are sometimes encountered. weeks old, and believed he had been “infected” at birth Tuberous sclerosis classically presents during infancy with the disease that was causing the ataques. They with seizures or myoclonic jerks. It is generally believed understood and accepted the need for antiscizure medi­ that the earlier the seizures occur, the more severe the cation. When informed that the infant might be devel- syndrome will be.2 It is estimated that only one third of opmentally delayed and that their child’s future health afflicted individuals have normal intelligence.3 Seizures was uncertain, the parents responded in a manner appro­ can appear as early as 1 week of age; in one series only priate to their culture: one of resignation and devoted 8% of those children with seizure onset before 1 year of care. age had normal intelligence.3 Traditionally, the skin has been believed to be the most commonly affected organ system in TS. A white tuft of hair, poliosis, is often the earliest sign of TS. Discussion Poliosis occurs in only 3% of normal births.9 Other This case presentation illustrates the importance of taking dermal stigmata that may be identified early include an adequate history. Despite linguistic and cultural bar­ cafe-au-lait spots, oval hypopigmented macules, and port riers, earlier diagnosis might have been achieved in this wine hemangiomas.1-10-12 As the afflicted child grows, case based on the clinical history alone. When the father subungual and periungual fibromas are noted, as are was given the opportunity to mimic his child’s seizure polyps in other parts of the body. Adenoma sebaceum, activity, he did so vividly. Parents, even those who are pathognomonic lesions, begin to be v isible from age 2 to poorly educated or from different linguistic backgrounds, 6 years and occur in more than 50% of patients. So-called arc the usual source of most valuable clinical information. shagreen patches develop at about the same time of onset A supportive environment and appropriate use of inter­ of adenoma sebaceum in 15% to 20% of afflicted indi­ preters can provide parents with the reinforcement nec­ viduals. Lancatc white macules or ash-leaf-shaped spots, essary to encourage them to share important informa­ are not pathognomonic. Gomez10 cautions that “there tion. Also in this case, dermal stigmata of tuberosis are individuals with typical hypomclanotic macules who sclerosis were noted first at 6 weeks of age and then do not have TS [and] there are individuals with TS who commented on in greater detail at 4 months of age. Had do not have even one hypomclanotic skin macule even these findings been pursued sooner, a diagnosis might under ultraviolet light illumination.” have been reached earlier. Tuberous sclerosis is considered a genetic disease of Tuberous sclerosis (TS), which has also been called variable penetrance and has been linked to abnormalities hereditary multiple hamartomatosis, is a multisystem dis­ of the long arm of chromosome 9.8-13-15-16 Linkage stud­ ease of relatively low incidence. The incidence of TS is ies arc underway in an attempt to confirm localization of variously reported as from 1 to 15 cases per 300,000.1-7 a specific gene. Eventually, molecular DNA analysis may Tuberous sclerosis was first described in 1862 by von provide more information about the cause of TS.14 Be­ Recklinghausen.1 In 1911, Sherlock coined the term cause of the putative genetic origin of this disease, careful epinoia (epi stemming from “epilepsy” and anoia from investigation of family members is indicated. All first- “mindless”).1 Bourncvillc, whose name is associated with degree relatives should undergo a complete physical ex­ the disease, coined the term tuberous sclerosis.* Vogt is amination and evaluation. associated with the diagnostic triad of mental retarda­ The majority' of TS patients develop seizures. The tion, adenoma sebaceum, and epilepsy.8 Tuberous scle­ most common seizures, as in the case discussion, are The Journal of Family Practice, Vol. 36, No. 3, 1993 345 Tuberous Sclerosis Blossom Table 1.
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