Paediatrica Indonesiana VOLUME 46 September - October • 2006 NUMBER 9-10 Case Report Male pseudohermaphroditism due to 5-alpha reductase type-2 deficiency in a 20-month old boy Ida Bagus Andhita, Wayan Bikin Suryawan ntersex conditions are the most fascinating con- paper reports a 20-month old patient with male ditions encountered by clinicians. The ability pseudohermaphroditism due to 5-alpha reductase to diagnose infants born with this disorder has type-2 deficiency. Iadvanced rapidly in recent years. In most cases, clinicians can promptly make an accurate diagnosis and give the advice to the parents on therapeutic Report of the case options. Intersex conditions traditionally have been divided into the following 5 simplified classifications A 20-month old ”girl”, came to the outpatient clinic based on the differentiation of the gonad, i.e. 1) fe- of the Department of Child Health, Sanglah Hospi- male pseudohermaphrodite characterized by two tal, Denpasar, with the chief complaint of a bump on ovaries, 2) male pseudohermaphrodite characterized the urinary duct noted since three months before ad- by two testes, 3) true hermaphrodite characterized mission. The urination and defecation were normal. by ovary and or testis and or ovotestis, 4) mixed go- History of pregnancy and delivery were normal. There nadal dysgenesis characterized by testis plus streak was no history of the same condition among the fam- gonad, and 5) pure gonadal dysgenesis characterized ily. No history of oral contraceptive, alcohol intake, by bilateral streak gonads.1-3 hormonal, or traditional medication during pregnancy. 5-alpha-reductase (5-ARD) type 2 deficiency His growth and development were normal. is an autosomal sex-linked disorder, resulting in Physical examination revealed an alert baby with the inability to convert testosterone to the more regular pulse rate of 120x/minute, respiratory rate of physiological active dihydrotestosterone (DHT). 30x/minute, axillary temperature of 36.5°C. Bodyweight DHT is the most potent androgen, bound selec- tively to the androgen receptors in genital skin and fibroblasts, making its action necessary for the de- velopment of normal male genital anatomy. Since Presented at The 13th National Child Health Congress, Bandung, DHT is required for normal masculinizaton of the Indonesia, July 4-7, 2005. external genitalia in utero, genetic males with 5- From the Department of Child Health, Medical School, Udayana ARD are usually born with ambiguous genitalia University, Denpasar, Bali, Indonesia. (male pseudohermaphroditism).2-4 The hallmark of 5-ARD is elevated ratio of serum testosterone Reprint requests to: Ida Bagus Andhita, MD, Department of Child Health, Medical School, Udayana University, Sanglah Hospital, Jl. P. to DHT. In healthy prepubertal children, the Nias, Denpasar, Bali. Tel. 62-361-227911/15, Ext. 128. Fax. 62-361- baseline testosterone-to-DHT ratio is 1:2.2,4-6 This 244038. 236 • Paediatrica Indonesiana, Vol. 46, No. 9-10 • September - October 2006 Ida Bagus Andhita et al: Male pseudohermaphroditism due to 5-alpha reductase type-2 deficiency was 12 kilograms, body height 85 centimeters, and he 22.0 ng/dl, still within normal values. Before perform- was well nourished. There were no abnormalities of ing hCG test, FSH, LH, testosterone, and DHT lev- head and neck; conjunctiva and sclerae of both eyes els were 11.5 mlU/ml, 0.6 mlU/ml, <2 ng/dl, and <2 were normal, the pupils were isocoric, and reflexes were ng/dl, respectively. After hCG test, testosterone level positive. The chest was symmetrical, the mammae ap- increased to 146 ng/dl while DHT level to 24 ng/dl. propriate to Tanner stage 1, the heart and lungs were Pelvic USG showed an absence of uterus and normal. Abdomen was normal and no mass on palpa- testes were suspected to be localized in right and left tion. Both extremities were normal. inguinal (Figure 2). Genitalia examination revealed the length of The diagnosis was male pseudohermaphrodite phallus was 1.3 cm, there were normal preputium, due to 5-alpha reductase type-2 deficiency. The ventral frenulum, and external urethral orificium. No parents were informed about this disorder, and mass was palpable in labioscrotal area, but a mass with they expected that their child adopts a male gen- a diameter of 1 centimeter was palpable in right in- der identity. guinal (Figure 1). Laboratory results showed WBC of 15,030/μl, haemoglobin of 12.7 g/dl, hematocrit of 40.2%, and Discussion platelets count of 250,000/μl. Urinary examination revealed normal result, renal function test revealed A deficiency of the type-2 isozyme 5-ARD, which normal with BUN of 10.8 mg/dl, and serum creati- transforms testosterone to DHT is the main cause nine of 0.3 mg/dl. Chromosomal analysis revealed 46, of ambiguous genitalia.5,6 Most individuals with XY; and the 17-alpha OHP concentration level was 5-ARD are identified in neonatal periods because FIGURE 1. EXTERNAL GENITAL EXAMINATION SHOWED BILATERAL LABIOSACRAL FOLDS AND SMALL-SIZED PHALUS. Paediatrica Indonesiana, Vol. 46, No. 9-10 • September - October 2006 • 237 Paediatrica Indonesiana FIGURE 2. PELVIC USG SHOWED THE ABSENCE OF UTERUS AND THE LOCATIONS OF BOTH TESTICLES. of ambiguous genitalia. However, some of these that occurs when an infant aged 1-3 months or after children are misdiagnosed as having partial or hCG stimulation.5, 6 complete androgen insensitivity syndrome (AIS), In this case, chromosomal karyotype was 46, which can produce almost identical phenotypes. XY and following hCG stimulation serum test- The clinical abnormalities range from infertility osterone level increased to 146 ng/dl while DHT with normal male genital anatomy to underdevel- was 24 ng/dl. This result showed an elevated ratio oped male with hypospadia to predominantly fe- of serum testosterone to DHT. USG can verify the male external genitalia, most often with mild location of the testes and the absence of the uterus, clitoromegaly. The phallus was indeterminate in which may be present in other conditions.6,7 size with the length falls between 1.0 cm (usual Vaginogram is a useful tool to assess vaginal length maximum for clitoris) and 2.0 cm (lower limit of by introducing small catheter or feeding tube into normal for a penis).5,7-9 the vagina. This study can verify that no fistula The diagnosis of 5-ARD can be confirmed in a connections present between urinary tract and va- patient with 46, XY karyotype. Currently mutation gina.6 In our case, pelvic USG showed the absence analysis of 5-ARD type-2 gene located at band 2p23 of uterus while the testes were suspected to be lo- is available only for research purposes and not com- cated in right inguinal. Based on clinical manifes- mercially. An elevated ratio of serum testosterone to tations, chromosomal karyotype report, hormonal DHT (T/DHT) occurs, demonstrated by the presence serum examination, and pelvic USG, the final di- of high ratio of testosterone serum to DHT. Usually, agnosis was male pseudohermaphrodite due to 5- testosterone level was normal to moderately elevated, alpha reductase type 2 deficiency. The differen- while DHT level is low to undetectable. This level tial diagnosis such as congenital adrenal hyperpla- can be measured at birth during testosterone surge sia, androgen insensitivity syndrome and 17-ke- 238 • Paediatrica Indonesiana, Vol. 46, No. 9-10 • September - October 2006 Ida Bagus Andhita et al: Male pseudohermaphroditism due to 5-alpha reductase type-2 deficiency tosteroid reductase deficiency could be ex- We are of the opinion that the prognosis of fer- cluded.10-15 tility of pseudohermaphroditism due to 5-alpha re- The major issues for individuals with 5-ARD are ductase type-2 deficiency is good. Males with 5 al- gender assignment. Almost all children with 5-ARD pha reductase deficiency have chance to be a fa- are assigned as female at birth. In many cultures which ther, although infertility could happen due to a low early surgery was not performed, some individuals with sperms count. Females with 5-alpha reductase de- 5-ARD adopt male gender identity and male gender ficiency will not be able to be pregnant but they role at puberty.6 still can have a family by either surrogacy or adop- No medical treatment required in infancy and tion. childhood; some evidence suggested that DHT therapy administered prior to puberty may increase penile size.16,17 Providing accurate and complete in- References formation to the child and family with 5-ARD is of paramount importance. Problems about gender and 1. Trijaya B. Kelainan genitalia eksterna. Presented at sexuality can extremely provoke anxiety and emo- Continuing Medical Education IDAI JAYA 2003. tional upset. Multidisciplinary team approach includ- 2. Ambiguous genitalia, conditions and diagnoses. Avail- ing geneticist, pediatric endocrinologist, pediatric psy- able from: URL: http://www.cincinnati_ childrens.org/ chiatrist or pediatric psychologist, pediatric surgeon health/info/urinary/diagnose/genitalia.htm or pediatric urologist is mandatory. 3. Hutchenson J, Snyder HM. Ambiguous genitalia and The geneticist is responsible for verifying the intersexuality. Available from: URL: http://www. karyotype and discussing with the family about this emedicine.com/PED/topic1980.htm abnormality, include the recurrence risk of 1:8 for each 4. Hughes IA. Minireview: Sex differentiation. Endocri- subsequent pregnancy. Pediatric endocrinologist is nology 2001;142(8):3281-7. responsible for verifying the biochemical nature of the 5. Wilson JD, Griffin JE, Russel DW. Steroids 5a-reduc- defect. Pubertal hormone replacement is usually in- tase 2 deficiency. Endocr rev 1993;14:577-93. stituted under supervision of a pediatric endocrinolo- 6. Wilson BE. 5-alpha reductase deficiency. 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