Preceded by Multiple Diagnostic. X-Rays One Year Prior to The
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A Malformation Complex of Ectrodactyly, Clefting and Hypomelanosis of Ito (Incontinentia Pigmenti Achromians) RAY E. STEWART, D.M.D., M.S. STEVEN FUNDERBURK, M.D. YOSHIO SETOGUCHI, M.D. Torrance, California 90509 A case is described which, at birth, had a bizarre pattern of Aypopigmentation (incontinentia pigment achromians), ectrodactyly involving all four extremities, and unilateral cleft lip and palate. This patient does not have the seizures or other neurological and developmental anomalies previously described as associated with Aypopigmentation of Ito. This condition is also clearly different from the syndrome of ectrodactyly, ectodermal dysplasia, and clefting (EEC). We have recently observed four-month-old tone. The child has developed normally, Mexican-American female infant with an in- reaching all of her age-appropriate milestones teresting constellation of anomalies, including with no evidence of neurological or other _ unilateral complete clefts of the lip and pal- problems. The Denver Developmental Scales ate, ectrodactyly of the hands and feet, and yielded an intelligence quotient of 100 at 14 generalized abnormalities in skin pigmenta- months of age. tion. The association of ectodermal changes, Examination of the head and neck revealed ectrodactyly, and oralfacial clefting has been unilateral complete cleft of the lip and palate. well documented in the EEC syndrome (ec- There was mild hypoplasia of the right exter- trodactyly, ectodermal dysplasia, and clefting nal ear (Figure 1). syndrome). However, this patient clearly does Examination of the skin revealed a peculiar not fall into this classification. generalized pattern of hypopigmentation over the entire body, including the head, neck, and Clinical findings face. On the dorsum, the pigmentation as- The child was the product of a full-term, sumed a swirling pattern. There was midline uncomplicated pregnancy of a 33-year-old demarcation of the pigment distribution an- gravida-4, para-4, abortion-0, mother and a teriorly, and there was a linear distribution 34-year-old father. The older siblings are nor- on the arms and legs. Several of the hypopig- mal. There is no family history of congenital mented areas were mildly desquamative. Bi- malformations, and there is no history of con- opsy of these areas showed no histopatholog- sanguinity. There was no known exposure to ical changes. There was a pink discoloration radiation, drugs, or other teratogens at the in the hypopigmented patches of skin over the time of conception or during the pregnancy. left shoulder, on both buttocks, and in both However, the mother had gallstone surgery axillae. There were several small heman- preceded by multiple diagnostic. x-rays one glomas located in the midback and glutial year prior to the pregnancy. _ reglons The affected areas of skin were nor- Birth weight was 8 lbs., 11 oz. The infant mal in texture. Sensation was intact, and was vigorous and alert and had good muscle sweating was normal. The hair and nails were of normal quality and quantity. The eyes were normal and with- Dr. Stewart is affiliated with UCLA/Harbor General out obstruction or defects of the lacrimal Hospital, Torrance, California. ducts. There were "lobster-claw'" deformities Drs. Funderburk and Setoguchi are affiliated W1th the Departments of Pediatrics and Psychiatry UCLA School of both hands and absence of the third digit of Medicine, Los Angeles. bilaterally. There was a bifid thumb on the 358 Stewart, et al., ECTRODACTYLY, CLEFTING AND HYPOMELANOSIS 359 phalanges of the third ray and clinodactyly of the first and fifth rays with no evidence of bony fusion. The left foot showed syndactyly of the pha- langes of the third and fourth toes with an absence of ossification of the middle phalanx of the fourth toe. Clinodactyly of the fifth toe was noted with absence of ossification of the distal and middle phalanges of the fifth toe. There was no evidence of bony fusion (Figure 4). The right foot had supernumerary rays be- tween the second and third digits with syn- dactyly of toes two, three, and four. There was shortening of the third metatarsal and a lack of ossification of the middle phalanx of the fifth toe. Again, there was no evidence of bony fusion. Discussion The clinical findings described in this pa- tient closely resemble a condition described by Ito (1952) which has been variously termed FIGURE 1. Patient at age 8 weeks showing unilat- incontinentia pigmenti achromians, systema- eral complete cleft of lip and palate, hypopigmentation on trunk, arms and face, and ectrodactyly. tized achromic nevus (Coupe, 1975; Cram, 1974) and hypomelanosis of Ito (Jelinek, right, and a rudimentary accessory index fin- 1973). In its classic description, this condition ger on the left. In addition, there was wide is said to consist of macular hypopigmented spacing between the second and third toes on whorls, streaks, and patches in a bilateral or the right foot and between the third and unilateral distribution affecting almost any fourth toes on the left foot. Syndactyly was portion of the body surface. Because of the present between the third and fourth toes on differences in the natural history of the cuta- the right side and between the second and neous defect, the histologic features, and the third toes on the left side (Figure 2). In addi- pattern of inheritance, this condition has been tion, there were deep horizontal plantar regarded as distinct and separate from incon- grooves in the first interdigital spaces bilat- erally. The remainder of the physical examination was unremarkable. Trypsin-Giemsa banded chromosome anal- ysis done on peripheral blood lymphocytes was normal. Radiographic findings Anterior posterior radiographs were done of the hands and feet. The right hand ex- hibited an absence of the third ray and ossi- fication of the middle phalanx of the fifth digit. There was clinodactyly of the second and fifth rays and nonossification of the distal phalanx of the second ray. Three phalanges were noted in the thumb. There was no evi- FIGURE 2. Feet showing 3-4 syndactyly on right dence of bony fusion. (See Figure 3.) and 2-3 syndactyly on left. Hypopigmentation is also The left hand exhibited an absence of the apparent. 360 Cleft Palate Journal, October 1979, Vol. 16 No. 4 FIGURE 3. Radiographs of hands. tinentia pigmenti which it resembles but as a and delayed development, have been the most negative image (Jelinek, et al., 1973). consequential of these defects, but ocular and Patients with the condition as described by musculoskeletal anomalies also have occurred Ito (1952) either have skin lesions at birth or with significant frequency. develop lesions early in life without a preced- In a report of eight patients by Schwartz et ing bullous or verrucous stage. The lesions are al. (1977), there was a particularly high inci- diagnostic clinically because of the extensive dence of nonspecific abnormalities. Six of the areas of bizarre, whorled, marbled, and eight patients had sufficient developmental streaked hypopigmentation which appear to delay to warrant placement in special educa- be unique to this disorder. Unfortunately, tion classes. Four patients had seizure disor- there are no specific histologic changes. Var- ders of varying degrees of severity. In three, ious reports on sections from hypopigmented onset of seizures occurred prior to the third lesions show only decreased numbers of mel- year of life. All four patients with seizures had anocytes, reduction of pigment production in significant scoliosis, and in three, prominent DOPA preparations, and incomplete melani- asymmetry of the lower limbs was noted. zation of melanosomes on electron microscopy Three of the eight patients had ophthalmo- (Stoebner, 1970). Compared to normally pig- logic abnormalities, which included isolated mented skin, melanosomes in keratinocytes iridal heterochromia, a mild alternating eso- from hypopigmented areas are fewer in num- tropia and myopia, microphthalmia, hyper- ber and are packaged individually (Cram, telorism, and nystagmus. Strabismus has been 1974). frequently reported along with other anoma- Reports of this condition in more than 30 lies, most significantly corneal opacity and affected individuals of various ethnic origins choroidal atrophy (Jelinek, 1973). reveal that it is accompanied by associated Abnormalities of teeth, hair, and nails have abnormalities of varying structures and sever- been reported in incontinentia pigmenti ach- ity in 50% of the cases. Central nervous system romians, but these are apparently not present dysfunction, particularly seizure disorders in the majority of cases. Stewart, et al., ECTRODACTYLY, CLEFTING AND HYPOMELANOSIS 361 It is essential to differentiate and distin- scribed in the absence of the more classic guish incontinentia pigmenti achromian from hyperpigmented lesions. Associated anomalies incontinentia pigmenti (Bloch-Sulzberger) are frequent, most commonly involving the with which it is frequently compared and central nervous system, eyes, musculoskeletal often confused. Although similarities do exist system, hair, and teeth. between the two conditions, there are several important differences. Pathogenesis Incontinentia pigmenti is an X-linked dom- The role of genetics in the pathogenesis of inant trait which is observed most frequently hypopigmentation of Ito is not clear (Ito, in females. The condition is thought to be 1952). The majority of reported cases are lethal for most affected males (Gordon, 1970). sporadic. However, a few instances of