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Omphalocele, extrophy of cloaca, imperforate anus and spine abnormalities-OEIS complex: a rare case report.

INTRODUCTION: CASE HISTORY: A third gravida of 30yrs age with previous normal obstetric history delivered a dead fetus with multiple congenital anomalies at 20wks of gestation. [Fig. 1] The mother had a non-consanguineous marriage and she did not have any antenatal history of drug intake or infection. USG-scan during antenatal period revealed the fetus to have omphalocele with polyhydramnios and kyphosis of lumbar spine. Birth weight a fetus was 750gms. On external examination head circumference was 20 cm crown rump length was (11) and crown heel length was 14cm. The sex was indeterminate as the fetus had ambiguous genitalia with prominent rugated labiosacral folds and no apparent genital tubercle. The baby had hydrocephalus, kyphoscoliosis of lumbar spine. The thorax showed no abnormality. Lower anterior abdominal wall was found to be defective (Omphalocele) 14x11cm and containing liver stomach, spleen and loops of intestine. [Fig. 2] The omphalocele presented with ruptured sac. Further examination of eviscerated organs revealed that liver is so enlarged that it is almost found to be in the midline. The situs was normal with stomach, spleen, ceacum with appendix and colon to the left. The colon presented with foci of atresia and stenosis. Both kidneys and adrenals were normal. [Fig. 3]

The diaphragm was normal. On thoracotomy lungs and thymus were found to be normal. External genitalia were not found. In perianal region there was no anal opening--imperforate anus. Both lower limbs were rotated to one side. fetal spine showed kyphoscoliosis and Extrophy of bladder cloaca mucosa is seen. There was a lumbosacral meningomyelocele and there is a attached umblical cord of size 12 cm and shows 2 arteries and 1 vein.

DISCUSSION: The term OEIS complex which consists of omphalocele, extrophy of bladder, imperforate anus and spine abnormalities was first coined by carey et al in 1978. (1) The incidence of OEIS complex is 1 in 200,000 to 1 in 400,000 pregnancies. (1) Most cases are sporadic with no obvious etiology. This is a rare complex disorder and very few instances of reccurence of anomalies in this cluster have been reported. In addition to the 4 classic malformations, a strong association with spina bifida and intersex was noticed.23 In a study performed by bohria et al, (4) it has been suggested and had pointed out that bladder extrophy and clocal extrophy are two distinct clinical entities. (5) It is thought that this OEIS complex results from a single defect of early blastogenesis or defect of a caudal mesodermal migration during primitive streak period that later contributes to the formation of infra umblical mesenchyme, cloacal septum and vertebrae. Ureters could be traced up to the exposed cloacal mucosa. The gonads could not be traced and there were no mullerian duct, uterus or fallopian tubes.

CHROMOSOMAL ASSOCIATION: Though most causes of OEIS are sporadic with no obvious etiology, it has been suggested that it is associated with some chromosomal aberrations. (2) The sporadic occurrence of OEIS complex suggest both environmental and genetic factor may play a role in its etiology. Grey et al and Keppler et al (6) had stated that cloacal extrophy is associated with maternal exposure to diphenyl hydantoin and valproic acid and cigarette smoking. Cloacal extrophy has been reported in patients with chromosomal anomalies including 3q12.2-3q13.2 deletion (7) and trisomy 18. Single gene defects may also head to OEIS complex altogether definitive evidence is lacking. (1)

It has been reported that homolouge genes such as H2xB9 and retenoic acid may play a role in OEIS complex. (5) There is a single first of reported case of OEIS complex associate with chromosome 1p deletion. (7,8)

OEIS complex is caused by recessive mutations of gene located in 1p36 region and deletion involved a mutation located in the exact homologue. (1,6,7)

EMBRYOLOGICAL BASIS: There are different explanations given for the occurrence of extrophy of cloaca. (4) A study done by marshall and mavericke (9) stated that the overdeveloped cloacal membrane is the basic defect and this presents migration of mesoderm between ectodermal and endodermal layers. Rupture of this unduly damage cloacal membrane before the descent of urorectal septum results in extra cloaca being exposed to exterior. (2,9) But another study done by beaudon S. et al suggested that failure of volation of pelvic bone primordia results in failure of final closure of ventral abdominal wall resulting in varying degree of extrophy. (5,10) Ultimately it appears that, there is a defect in the gastrulation in the caudal part of embryo, caudal displacement of phallus, and defect in the urorectal septum all of which leads to extrophy of cloaca. (7,11,12) Lack of mesoderm in the infraumblical abdominal wall results in omphalocele.

Associated Anomalies:

Different anomalies can be associated with oeis complex.

Cardiac anomalies, renal anomalies, increased nuchal translucency markedly.

Elevated serum levels of alfa fetoprotein are always present. But most cases of oeis.

Eases are diagnosed only at autopsy after interruption of pregnancy.

CONCLUSION: Accurate prenatal diagnosis of oeis complex associated with malformations is important for detailed counseling of the family, appropriate perinatal management by the obstetrician, pediatric, neonatologist and especially pathologist.

DOI: 10.14260/jemds/2015/1299


(1.) American J. of medical genetics--OEIS complex a case report--AYMAN W, JOSH C et al august 2009.

(2.) Austin P.F., Homsy Y.L., Gearhart J.P., Porter K., Guidi C., Madsen K., Maizels M.- The prenatal diagnosis of cloacalexstrophy.

(3.) Witters I, Deprest J, Van Hole C, Hanssens M, Devlieger H, Fryns JP. 2004. Anogenital malformation with ambiguous genitaliaas part of the OEIS complex. Ultrasound Obstet Gynecol 24:797-804.

(4.) Bohring A. OEIS complex. VATER, and the ongoing difficulties in terminology and delineation (Letter). Am J Med Genet 2002;107:72-76

(5.) Carey JC, Greenbaum B, Hall BD. The OEI Scomplex (Omphalocele, exstrophy, imperforateanus, spinal defects). Birth Defects 1978; 14: 253-63.

(6.) Kallen K., Castilla E.E., Robert E., Mastroivacovo P;, Kalle P.- OEIS complex a population study. Am J med Genet 2000; 92 : 62-8.

(7.) Langer JC, Brennan B, Lappalainen RE, Caco CC, Winthrop AL, Hollenerg RD, Paes BA. 1992. Cloacal exstrophy: Prenatal diagnosis before rupture of the cloacal membrane. J Pediatr Surg 27:1322-1325.

(8.) Gosden c brock prenatal diagnosis of extrophy of cloaca,. am j med genetics 1981 8:95-109

(9.) Wu J-L, Fang K-H, Yeh G-P, Chou P-H, Hsieh T-C. 2004. Usingcolor doppler sonography to identify the perivesical umbilicalarteries. A useful method in the prenatal diagnosis of omphalocele-exstrophy-imperforate anus-spinal defects complex. J Ultrasound Med 23:1211-1215.

(10.) Girz BA, Sherer DM, Atkin J, Venanzi M, Ahlborn L, Cestone L. 1998. First-trimester prenatal sonographic findings associatedwith oeis (omphalocele-exstrophy-imperforate anusspinaldefects) complex: A case and review of the literature. Am J Perinatol 15:15-17.

(11.) Vasudevan PC, Cohen MC, Whitby EH, Anumba DOC, QuarrellOW. 2006. The OEIS complex: Two case reports that illustrate the spectrum of abnormalities and a review of the literature. Prenat Diagn 26:267-272.

(12.) Yang F Henningsen C Fuentes a. OEIS Complex a case report journal of diagnostic medical sonography. 2007:23910; 13-8.

Uram Aruna Jyothi [1], B. A. Ramakrishna [2], K. Vandana [3]


[1.] Uram Aruna Jyothi

[2.] B. A. Ramakrishna

[3.] K. Vandana


[1]. Assistant Professor, Department of Pathology, Asram Medical College, Eluru, Andhra Pradesh.

[2]. Professor, Department of Pathology, Asram Medical College, Eluru, Andhra Pradesh.


[3.] Professor, Department of Gynaecology, Asram Medical College, Eluru, Andhra Pradesh.


Dr. Uram Aruna Jyothi, Assistant Professor, Department of Pathology, B Module, Asram Medical College, Malkapuram, Eluru, Andhra Pradesh.


Date of Submission: 06/06/2015.

Date of Peer Review: 07/06/2015.

Date of Acceptance: 22/06/2015.

Date of Publishing: 25/06/2015.
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Title Annotation:CASE REPORT
Author:Jyothi, Uram Aruna; Ramakrishna, B.A.; Vandana, K.
Publication:Journal of Evolution of Medical and Dental Sciences
Date:Jun 25, 2015
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