DYSCEPHALIA MANDIBULO-OCULO-FACIALIS*

Similar documents
Bones and Features of the Skull - Cranium and Face Sheri Amsel

ANATOMY & PHYSIOLOGY I Laboratory Version A Name Section. REVIEW SHEET Exercise 10 Axial Skeleton

The Newborn With a Congenital Disorder. Chapter 14. Copyright 2008 Wolters Kluwer Health Lippincott Williams & Wilkins

The Skeletal System. Skull, Vertebral Column and Girdles Pages 27-29

HEAD ANATOMY & PHYSIOLOGY

There are approximately 206 bones in your body and 22* of them belong to your skull.

There are approximately 206 bones in your body and 22* of them belong to your skull.

Human Growth and Reproduction

OVERALL PERFORMANCE. Pediatrics In-Training History and Physical Examination (HPE) Assessment

Objectives AXIAL SKELETON. 1. Frontal Bone. 2. Parietal Bones. 3. Temporal Bones. CRANIAL BONES (8 total flat bones w/ 2 paired)

a guide to understanding moebius syndrome a publication of children s craniofacial association

a guide to understanding pierre robin sequence

FETAL DEVELOPMENT OF THE UNBORN CHILD FIRST TRIMESTER

repetitio est mater studiorum

Chromosomal Syndromes: Cri du Chat Syndrome

This disorder affects all races and regions of the world equally. There are no known environmental risks for Turner syndrome.

The Skeletal System: Axial Division Pearson Education, Inc.

Congenital Anomalies In Diamond Blackfan Anemia (DBA)

The Skeletal System PART A. PowerPoint Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College

Chapter 10. All chapters, full text, free download, available at SINUS BAROTRAUMA ANATOMY OF THE SINUSES

The Axial Skeleton Eighty bones segregated into three regions

FETAL DEVELOPMENT FIRST TRIMESTER

3.04 Functions and disorders of the eye Understand the functions and disorders of the sensory system

Reavis High School Medical Terminology Curriculum Snapshot

For the full report please visit the Victorian Birth Defects Register Website:

a guide to understanding pfeiffer syndrome

CHARGE syndrome; the R and the G Jeremy Kirk

MODERN CLINICAL OPTOMETRY BILLING & CODING THE MEDICAL EYE EXAMINATION. Definitions of Eye Examinations. Federal Government Definition

Chapter 7: Skeletal System: Gross Anatomy

Chapter 17. Caring for Older Adults

a guide to understanding fibrous dysplasia

Tessier Clefts By Patricia Bacon Smith

THE NERVOUS SYSTEM: SPECIAL SENSES

NOSE, NASAL CAVITY AND PARANASAL SINUSES

Pathophysiology (HPRS 2301) Fully Online

} The eyes are protected by the skull. } Seven bones form the orbit or eye socket. } Fat in the orbit helps to cushion the globe


Anatomy & Physiology 120. Lab 5: Skeletal Lab

213: HUMAN FUNCTIONAL ANATOMY: PRACTICAL CLASS 9 Face & Surface anatomy of the head & neck

Chapter 19. Prenatal Development and Birth

DENT2062 Course Summary (Part B)

Myofunctional Orthodontics. Information for parents and Children under 12 years. Orthodontic Early Treatment Centre

Adult Strabismus and Pediatric Ophthalmology - New Patient Questionnaire Page 1: Background Information

Management in the pre-hospital setting

How To Understand The Brain

CELL DIVISION. STAGES OF MITOTIC DIVISION (Diag. C1)

CHROMOSOMES Dr. Fern Tsien, Dept. of Genetics, LSUHSC, NO, LA

Each person normally has 23 pairs of chromosomes, or 46 in all. We inherit one chromosome per pair from our mother and one from our father.

ORIGINAL BIRTH CERTIFICATE INFORMATION

Visual Disorders in Middle-Age and Elderly Patients with Diabetic Retinopathy

213: HUMAN FUNCTIONAL ANATOMY: PRACTICAL CLASS 8 The Skull and Regions of the Head and Neck

a guide to understanding crouzon syndrome a publication of children s craniofacial association

Genetics and Coding: What the Primary Care Provider Needs to Know

Eye Problems and Ectodermal Dysplasia

Conception. Prenatal Development. Developmental Processes. Developmental Processes

human anatomy 2016 lecture fifth Dr meethak ali ahmed neurosurgeon

Non-covered ICD-10-CM Codes for All Lab NCDs

Recommended Clinical Evaluations for the Child with PKS

Sex Chromosome Problems Discovered Through Prenatal Diagnosis

NEURO-OPHTHALMIC QUESTIONNAIRE NAME: AGE: DATE OF EXAM: CHART #: (Office Use Only)

Embryology. From Conception through Birth. From Conception through Death

Human Anatomy Lab #4: Human Anatomy in Perspective

Chromosomes and Karyotypes

Human, Male, White. Bone Clones Osteological Evaluation Report. Product Number: 1 intact mandible. General observations:

Dental and General Anatomy

Genetic Mutations. Indicator 4.8: Compare the consequences of mutations in body cells with those in gametes.

Introduction (1) Speech Physiology. Introduction (3) Introduction (2) Introduction (4) Introduction (5)

One of the main arteries supplying the back of the brain.

Georgia Department of Human Resources BACKGROUND INFORMATION FOR NON-STATE AGENCY CHILD

There is also a CHARGE Family Support Group which brings together families to share information, ideas and to offer mutual support.

HEAD AND NECK ANATOMY

Parts of the Brain. Chapter 1

Objectives. Who are Candidates for GH. Growth Charts. Short Stature

Thibodeau: Anatomy and Physiology, 5/e. Chapter 23: Anatomy of the Respiratory System

The Axial Skeleton I

Alcohol Use and Pregnancy

CRANIOFACIAL ABNORMALITIES

Clinical Genetics. Charles Williams, M.D. Division of Genetics and Metabolism UF Department of Pediatrics

Facial growth and airway in children

ADULT GENETICS PATIENT QUESTIONNAIRE

Pregnancy and Substance Abuse

Prehistoric skulls have minimal malocclusions. Why do contemporary industrialized societies have such a high incidence of malocclusion?

Frank Cairo R.T. ( R ) ( MR ) ( CT )

Salivary Gland Disorders

Introduction... 1 Par t I: Living for Linguistics... 7

Why is prematurity a concern?

Help maintain homeostasis by capturing stimuli from the external environment and relaying them to the brain for processing.

Anterior horn cell disorders

Treacher Collins Syndrome

Anatomy: The sella is a depression in the sphenoid bone that makes up part of the skull base located behind the eye sockets.

5. THE TRIGEMINAL SYSTEM Somatic Sensation of the Face and Head

ADENOMA OF THE LIMBAL CONJUNCTIVA*

Life Insurance Application Form

Chapter 7 Diseases of the Eye and Adnexa. Presented by: Jennifer Kurkulonis

Developing Human Fetus

Why does my child have a hearing loss?

Write the terms that match the phrases in the spaces at the right. 1) The study of cells. Cytology 2) The study of body organization and structure.

THE EYES IN MARFAN SYNDROME

VISION, HEARING, NOSE, THROAT, GASTROINTESTINAL, URINARY, ENDOCRINE AND HEMATOPOIETIC IMPAIRMENTS

THE HUMAN SKELETON 29 MAY 2013

Transcription:

Arch. Dis. Chilcdh., 1965, 40, 57. DYSCEPHALIA MANDIBULO-OCULO-FACIALIS* (HALLERMANN-STREIFF BY SYNDROME) D. HOEFNAGEL and K. BENIRSCHKE From the Departments of Pathology and Pediatrics, Dartmouth Medical School, the Department ofpediatrics, Hitchcock Clinic, Hanover, New Hampshire, the Department ofpediatrics, Boston City Hospital, Boston, Massachusetts, and the Laconia State School, Laconia, New Hampshire, U.S.A. The classification of the cranio-facial dysostoses is hampered by the great heterogeneity of the various developmental anomalies of face and skull. The purpose of this paper is to describe three cases of one of the rarer of these entities, dyscephalia mandibulooculo-facialis. Cases of this syndrome have been described under a variety (RECEIVED FOR PUBLICATION APRIL 14, 1964) of names: 'Vogelgesicht und Cataracta congenita' (Hallermann, 1948); 'Dysmorphie mandibulo-faciale (tete d'oiseau) et alterations oculaires' (Streiff, 1950); 'Dyskephalie mit Cataracta congenita und Hypotrichose' (Ullrich and Fremerey-Dohna, 1953); 'Hallermann-Streiff syndrome' (Falls and Schull, 1960); 'Syndrome dyscephalique de Franqois' (Carones, 1961); 'Dyscephalia mandibulo-oculo-facialis' (Waardenburg, Franceschetti, and Klein, 1961). TABLE RELEVANT DATA IN THE CASES Age of Parents Birth- Teeth Case at Time of Pregnancy weight Present No. Birth of Child (kg.) at (yr.) Birth I Fa: 36 Full-term 2-4 Yes Mo: 37 2 Fa: 35 Full-term 2-6 Yes Mo: 33 3 Fa: 39 7 months 1.91 Yes Mo: 34 Case Reports Some relevant data of the three cases have been summarized in the Table. In none of the families was there evidence of consanguinity or familial disorders. The pregnancies and deliveries had a normal course in all three cases. Tests for galactosaemia and congenital lues were negative in all 3 cases. * This study was supported by Grant GM 10210 of the United States Public Health Service and a Grant from the Charles H. Hood Dairy Foundation. 57 Case 1. White female examined at the age of 1 year because of nystagmus. The child weighed 5 * 35 kg.; severe retardation of growth and development was evident. The head was small and flattened posteriorly (Fig. 1). The eyes were examined under anaesthesia: both globes were small, the corneae were clear, but small; the anterior chambers were of average depth, there were extensive posterior synechiae, no details of the ocular fundi were visible because of dense cataracts. The eyelids were lax and the tarsal plates missing or rudimentary; the lacrimal punctae were present. Tear secretion was normal. Eyebrows and eyelashes were absent. When examined at the age of 8 years (Fig. 2) her weight was 11 kg. and height 102 cm. The head was brachycephalic with a circumference of 47 cm. and prominent frontal and parietal eminences; there was sparse growth of fine blond hair restricted to the posterior part of the head; the FIG. 1.-Appearance of Case 1 at the age of 1 year.

58 HOEFNAGEL AND BENIRSCHKE FIG. 2.-Case 1 at the age of 8 years. FIG. 5.-Case 3 at the age of 2j years. Arch Dis Child: first published as 10.1136/adc.40.209.57 on 1 February 1965. Downloaded from http://adc.bmj.com/ FIG. 3.-Case 2 at the age of 61 years. FIG. 4.-Close-up of head and face of Case 2 at the age of 61 years. on 1 May 2018 by guest. Protected by copyright.

D YSCEPHALIA MANDIBULO-OCULO-FACIALIS 59 fontanelles were closed to palpation, but radiologically normal. At the age of 7 years the 24-hour output of the anterior and posterior fontanelle were still open. 17-ketosteroids, determined on two separate occasions, The ears were low set. There was severe micrognathia was 810,ag. and 670 pg./24 hr. X-ray studies showed a with marked limitation of movement in both temporomandibular joints. The nose was beaked with a deviation wrists showed a bone age of 2 years and 3 months. The generalized osteoporosis of the skeleton, and films of the of the nasal septum. anterior and posterior fontanelles were open, there was no The mouth was small and the palate had a high arch; the tongue was very small, but it moved normally. Twelve teeth were present, irregular in shape and implantation; the right upper central incisor was missing. The joints were hyperextensible, particularly in the elbows and knees. The reflexes were normal. The external genitalia were hypoplastic. The child drooled excessively, had no intelligible speech, could not walk, was not toilet-trained, and could not feed herself. General laboratory studies of blood and urine were normal. Sex chromatin bodies were present in 50% of buccal smear cells and drumsticks in 2 % of leucocytes. Short-term cultures of peripheral blood on three separate occasions showed a modal number of 46 chromosomes. Karyotypes of numerous metaphases were prepared and all these were normal. X-iay studies at the age of 7 years showed generalized osteoporosis of the skeleton. The anterior and posterior fontanelles were open, there was no platybasia, and the sella turcica and paranasal sinuses were normal. The orbits were small. The ascending ramus of the mandible was very small bilaterally and the temporo-mandibular joints were absent. Films of the wrists showed a bone age of 4 years. There were four normal sibs, an older and a younger brother and sister; the mother had had one miscarriage between her first and second child. Case 2. White male, examined at the age of 5 months because of slow growth and development. Bilateral cataracts were noted at that time and these were subsequently removed. Examination at the age of 64 years showed a boy of diminutive proportions (Fig. 3) with a high-pitched, shrill voice and infantile behaviour; he was greatly handicapped by poor vision. He weighed 7-5 kg. and his height was 76 cm. The brachycephalic skull measured 46 cm. in circumference and showed prominent frontal bossing, while the anterior and posterior fontanelles were still open. There was sparse, thin blond hair limited to the posterior two-thirds of the skull. The nose was sharply hooked with a prominent deviation of the nasal septum. There was marked micrognathia (Fig. 4) and considerable symmetrical limitation of movement in the temporo-mandibular joints where no movement could be felt. The palate was highly arched and the tongue was thin and small. Many of the teeth, 16 in number, were irregular in shape. The following abnormalities were noted in the eyes: a constant searching, pendular nystagmus, blue sclerae, bilateral microphthalmus, and microcomea, absence of eyebrows, eyelashes, and lacrimal punctae; the tarsal plates could be felt and tears were present. Scrotum and penis were small, the latter showing a coronal hypospadias; no testes could be felt and there were no inguinal herniae. The joints were hyperextensible, particularly in the knees, leading to marked genu recurvatum. The reflexes were normal. General laboratory studies of blood and urine were platybasia, the sella turcica and paranasal sinuses were normal, and the orbits were small. The ascending rami of the mandible and the temporo-mandibular joints were absent. There were no sex chromatin bodies in the cells of a buccal smear and no drumsticks in 200 leucocytes of peripheral blood. There were two older normal sisters, and the mother denied having had miscarriages. Minor respiratory infections often led to marked obstruction of the upper respiratory tract; in addition the patient suffered from grass and weed pollinosis; this allergy was present in several members of the immediate family. At the age of 8 years, in the course of an illness with fever and coryza, the child acutely developed severe respiratory distress and died soon after admission to the hospital. NECROPSY. The eyes were fixed with formalin immediately after death. Histological sections showed, in addition to the findings of post-operative aphakia, congenital focal tapeto-retinal adhesions in a region just nasal to the macula, characterized by proliferation of the pigment epithelium and focal gliosis of the outer layers of the retina. The optic nerves were normal. Pertinent findings of the general necropsy included a chronic bronchitis and oedema, and congestion and focal pneumonitis in the lungs. Both grossly and microscopically no testicular tissue could be found and only seminal vesicles and vasa differentia were identified with certainty. The lymphoid system, brain, endocrine glands, and the skin with appendages were normal. Case 3. This girl was examined at the age of 3 months because of a pendular nystagmus in both eyes. Examination showed bilateral cataracts, blue sclerae, microphthalmia and microcornea; the eyebrows were absent and the eyelashes sparse. Extracapsular cataract extractions were performed at the age of 10 months. Subsequent examination of the fundi showed the presence of punched-out areas of depigmentation with scalloped borders at the posterior poles of both eyes, involving the macular areas. There were numerous scattered hyaline dots within these areas of depigmentation, but there was no area of actual detachment. The following additional findings were made at the age of 24 years (Fig. 5): the skull was brachycephalic with a circumference of 37 * 5 cm. and prominent frontal bossing. There was absence of hair growth over the frontal part of the skull with the anterior hairline approximately at the level of the coronal sutures. The nose was small and beaked with small nostrils, the mandible was underdeveloped, but movement in the temporo-mandibular joints was normal. The palate was highly arched and the tongue was of normal size. The teeth had erupted in a disorderly fashion. X-ray studies at the age of 2 years and 3 months showed a normal sella turcica, thick and

60 short ascending rami of the mandible and normal temporo-mandibular joints. The orbits were small. Minor respiratory infections caused much difficulty with breathing, because of the underdeveloped nasal structures. In the course of such an infection at the age of 3 years and 3 months, the child unexpectedly died. The pertinent finding at necropsy was a massive haemorrhagic bronchopneumonia and dilatation of the right side of the heart. No histological abnormalities were noted in other organs, including the brain. The eyes were not examined. There were two other brothers and one older sister, the mother hadi not had any known miscarriages. HOEFNAGEL AND BENIRSCHKE Discussion An extensive review of the first 25 reported cases of dyscephalia mandibulo-oculo-facialis has been published by Franqois (1958). Subsequently other cases have been described by Falls and Schull (1960), Calmettes, Deodati, Cadenat, and Bechac (1960), Bonamour and Leopold (1960), Carones (1961), van Balen (1961), Ponte (1962), and Manzitti and Alezzandrini (1963). It is evident from a survey of these reports that dyscephalia mandibulo-oculofacialis is to be regarded as a separate entity and that a variation in degree of the deformity exists, which not only concerns the principal anomalies of head and eyes, but also pertains to other features such as dwarfism and the retardation of motor and mental development. The outstanding features of the syndrome are as follows: (1) abnormalities of the skull; (2) malformations of the face; (3) dental anomalies; (4) localized hypotrichosis; (5) congenital abnormalities of the eyes; (6) dwarfism; and (7) motor and mental retardation. The skull is brachycephalic in most instances, with a discrepancy in size of the large cranial vault and the small facial skeleton. By measurement, the head circumference can be normal or at the lower limits of normal. Prominent frontal and parietal eminences are present. The posterior fontanelle is frequently open at birth and remains so for a long time. The anterior fontanelle is large and remains patent well into childhood, as in our cases, or even later; in Case 6 of Falls and Schull (1960) the anterior fontanelle was still open at the age of 20 years. The sutures are usually widely open. The skin of scalp and face, especially over the nose, is white, thin, and tense with many small blood vessels readily visible. A striking feature is the diminished hair growth on the scalp. The hair is thin and sparse with areas of complete baldness; the latter either consists of patches of alopecia along the lambdoid and coronal sutures or, more typically, there is a complete baldness over the frontal area with an anterior border at the level of the coronal sutures. Radiology of the cranial vault has shown in some cases the presence of a shallow sella turcica, platybasia or increased digital markings. The ears are low set and, except for minor abnormalities of the ear-lobes, have a striking absence of deformities. In the majority of cases hearing is normal, but occasionally deafness is suspected (Bonamour and Leopold, 1960). The nose is small and beaked, with a sharp nasofrontal angle and often a deviation of the nasal septum. The narrow upper air passages lead to feeding difficulties in the newborn period and early infancy, and minor respiratory infections in later life cause obstruction, at times making tracheotomy necessary (van Balen, 1961; Falls and Schull, Case 3, 1960). The mouth is small with thin lips, and the palate is high arched. Fully erupted teeth at the time of birth are frequently present. The deciduous and permanent teeth erupt irregularly, are often malformed or sometimes absent altogether, especially one or more of the upper incisors. The zygomatic process is hypoplastic, but the most impressive change in the facial skeleton concerns the mandible and the temporomandibular joints. Clinically there is pronounced 'open bite', because of marked mandibular hypoplasia, while the deformities of the temporomandibular joints lead to limitation in opening the mouth. In some cases the temporo-mandibular joint is absent. The most common anomalies of the eyes are bilateral microphthalmia, congenital cataract, ocular nystagmus, and strabismus. In several of the cases reported, spontaneous resorption of the cataracts occurred. In addition to these principal anomalies, many others have occurred in individual cases; these have been described by Franqois (1960). In several cases in which the fundi have been inspected, degenerative disease of the retina has been noted such as chorioretinal atrophy or peripapillary choroid atrophy (Cases 2 and 3). Bodily growth is severely retarded in most cases, resulting in a proportionate dwarfism with retarded bone age. Pubic and axillary hair are sparse to absent, the external genitalia under-developed and, in the males, the testes are commonly undescended or, when palpable, small in size. In Case 2 necropsy showed the testes to be absent. Hyperextensibility of joints, particularly in the knees, leading to genu recurvatum is commonly found. Motor, mental, and speech development are usually retarded, often profoundly so. The family histories of most of the cases so far reported are incomplete. Consanguinity between parents has been reported in the first case of Manzitti and Alezzandrini (1963), but the degree of

D YSCEPHALIA MANDIBULO-OCULO-FACIALIS 61 blood relationship is not mentioned. Familial consists of abnormalities of the skull, malformations occurrence has been reported by Larmande, as of the facial skeleton and jaws, dental anomalies, quoted by Manzitti and Alezzandrini (1963). Van including the presence of erupted teeth at birth, Balen (1961) described the condition in two male localized hypotrichosis, congenital abnormalities of twins, allegedly uniovular. With few exceptions, the eyes, dwarfism, and motor and mental retardation. The results of cytogenetic studies in one case the pregnancies have been uncomplicated and fullterm, and the birth weights have been in the normal and necropsy findings in two of the cases are reported. range. Birth order within sibships has not shown any particular trend and there has not been an unusual number of abortions in the reproductive histories of the mothers. Male and female cases have been reported with equal frequency. The ages of the parents are too infrequently mentioned to be of use in the evaluation of this factor. The patient of Ponte (1962), a woman with the syndrome in an unusually mild form, had given birth to two normal children. Normal sex chromatin findings were reported in Case 6 of Falls and Schull (1960) and in the case of Bonamour and Leopold (1960). Carones (1961) has reported the results of cytogenetic studies in his case; cultures of fascia lata showed a normal modal number of chromosomes and in the karyotypes some discrepancy in size of two members of a pair of the 13-15 (D) group was noted. In our first case there was no structural abnormality observed in the chromosomes of the 13-15 group. At first sight dyscephalia mandibulo-oculo-facialis is commonly confused with progeria (Hutchinson- Gilford), but the presence in the latter of a generalized atrophy of the skin and muscles, arthritis, early arteriosclerotic changes, and the absence of cataracts are some points of difference. Other entities with a superficial resemblance to the condition under discussion are mandibulo-facial dysostosis and cleidocranial dysostosis; Franqois (1958) has given an extensive differential diagnostic tabulation. Summary Clinical and radiological findings are described in three cases of dyscephalia mandibulo-oculo-facialis (Hallermann-Streiff syndrome). This syndrome We thank the following colleagues for clinical information and help in obtaining material for histopathological examination of Cases 2 and 3: Dr. E. Twible and Dr. W. Mosig, Springfield, Massachusetts; Dr. J. Giammalvo, Holyoke, Massachusetts; Dr. S. D. Liebman, Boston, Massachusetts; Dr. S. E. Wheelock, Hitchcock Clinic, Hanover, New Hampshire; Dr. H. Buckbee, Dolgeville, New York, Dr. W. R. Redline, Utica, New York, Dr. D. G. Cogan, Howe Laboratory of Ophthalmology, Boston, Massachusetts described th-, histopathology of the eye. REFERENCES Balen, A. Th. van (1961). Dyscephaly with microphthalmos, cataract and hypoplasia of the mandible. Ophthalmologica (Basel), 141, 53. Bonamour, G., and Leopold, P. (1960). Syndrome dyscephale avec tete d'oiseau (syndrome de Frangois). Bull. Soc. Ophtal. Fr., p. 85. Calmettes, L., Deodati, P., Cadenat, H., and Bechac, G. (1960). La dysmorphie mandibulo-faciale type Francois (a propos d'un cas). Rev. oto-neuro-ophtal., 32, 275. Carones, A. V. (1961). Syndrome dyscephalique de Fran4ois. Ophthalmologica (Basel), 142, 510. Falls, H. F., and Schull, W. J. (1960). Hallermann-Streiff syndrome. A dyscephaly with congenital cataracts and hypotrichosis. A.M.A. Arch. Ophthal., 63, 409. Franqois, J. (1958). A new syndrome. Dyscephalia with bird face and dental anomalies, nanism, hypotrichosis, cutaneous atrophy, microphthalmia, and congenital cataract. ibid., 60, 842. (1960). Syndromes with congenital cataract (XVI Jackson Memorial Lecture). Trans. Amer. Acad. Ophthal. Otolaryng., 64, 433. Hallermann, W. (1948). Vogelgesicht und Cataracta congenita. Klin. Mbl. Augenheilk., 113, 315. Manzitti, E., and Alezzandrini, A. A. (1963). Syndrome dyscephalique de Frangois. Ann. Oculist. (Paris), 196, 456. Ponte, F. (1962). Further contributions to the study of the syndrome of Hallermann and Streiff (Congenital cataract with 'Bird's Face'). Ophthalmologica (Basel), 143, 399. Streiff, E. B. (1950). Dysmorphie mandibulo-faciale (tete d'oiseau) et alterations oculaires. ibid., 120, 79. Ullrich, O., and Fremerey-Dohna, H. (1953). Dyskephalie mit Cataracta congenita und Hypotrichose als typischer Merkmalskomplex. ibid., 125, 73 and 144. Waardenburg, P. J., Franceschetti, A., and Klein, D. (1961). Genetics and Ophthalmology, Vol. 1. Blackwell, Oxford.