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is a significant concern for physicians. Central! \" h: Z _6 ? n9 y
precocious puberty (CPP), which is mediated
3 ]' [& @* _/ Xthrough the hypothalamic pituitary gonadal axis, has
5 d, Y9 ]! P2 va higher incidence of organic central nervous system( [2 g$ G0 E5 H2 z. }5 ?
lesions in boys.1,2 Virilization in boys, as manifested1 L0 l/ o5 K1 ]/ v5 c
by enlargement of the penis, development of pubic% u( M, j6 z0 J& U, p: S+ d( O
hair, and facial acne without enlargement of testi-
; f U0 O$ ?' o) k0 Fcles, suggests peripheral or pseudopuberty.1-3 We
% w/ ^$ t5 T5 H3 Oreport a 16-month-old boy who presented with the
* K) d0 }2 a- M# p( Nenlargement of the phallus and pubic hair develop-5 V( w! F; |5 c H m
ment without testicular enlargement, which was due
* Q9 s m% k) {( U% x* t# }+ Nto the unintentional exposure to androgen gel used by ?/ s1 a) ~" g. E
the father. The family initially concealed this infor-1 U+ N. e0 B! E. z+ X' D" r2 o, G- w
mation, resulting in an extensive work-up for this$ Y) }6 j; A% }8 N/ n7 n
child. Given the widespread and easy availability of
& k5 s# M: R' J M# etestosterone gel and cream, we believe this is proba-
8 R% j2 S" G* k5 w( G$ wbly more common than the rare case report in the& g+ r& c, w" z
literature.4& z1 f2 N' w A1 C1 z+ X: `
Patient Report# F8 w8 Z' W4 m
A 16-month-old white child was referred to the
0 s6 m) ]5 Z4 ?8 S# T7 Hendocrine clinic by his pediatrician with the concern& W9 Y0 X1 a! c! V
of early sexual development. His mother noticed4 S h( V* W+ e
light colored pubic hair development when he was8 S6 u' L. @4 c: `
From the 1Division of Pediatric Endocrinology, 2University of
) \0 Z/ _: V% u) m% rSouth Alabama Medical Center, Mobile, Alabama.; E: N% g/ M l* \# j1 b+ j
Address correspondence to: Samar K. Bhowmick, MD, FACE,$ j; E" X6 `7 K, Y' l1 Q* _, r
Professor of Pediatrics, University of South Alabama, College of4 |$ l( Z* i, B
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
. c: Q" {$ M/ u0 a1 J9 V* qe-mail: [email protected].4 U# p3 i1 z2 Q8 E& s& d
about 6 to 7 months old, which progressively became
* U( L! ~1 ~: g; ndarker. She was also concerned about the enlarge-
& E- c9 U6 z/ l! J0 Ument of his penis and frequent erections. The child, R8 h. U2 G9 {0 c5 y9 T; Q( [
was the product of a full-term normal delivery, with
6 G8 }) Q9 c9 O% z; F5 K7 Ca birth weight of 7 lb 14 oz, and birth length of( j, X; R z- q R
20 inches. He was breast-fed throughout the first year
7 }- [1 M6 w1 ]5 C. sof life and was still receiving breast milk along with, V' x$ D5 [; J$ q7 [
solid food. He had no hospitalizations or surgery,
6 w! c5 d% K$ ^and his psychosocial and psychomotor development
, I C% p" w* K9 |: V& o/ ^was age appropriate.
1 H4 K7 `- E, A. pThe family history was remarkable for the father,- Y+ u0 W# K# N" c0 F+ E; S) {
who was diagnosed with hypothyroidism at age 16,
; Y' f: G$ b' j$ Fwhich was treated with thyroxine. The father’s
* z4 l( K$ J) \; c. k2 eheight was 6 feet, and he went through a somewhat
/ V& W- j- r$ j& cearly puberty and had stopped growing by age 14.9 t9 z, d' y$ x2 H, L# F3 N' j
The father denied taking any other medication. The- `% o4 g; S2 h$ G4 x) R
child’s mother was in good health. Her menarche
+ s9 F& K6 q% H' i0 p. bwas at 11 years of age, and her height was at 5 feet
& _+ W+ A% |" D& A0 h2 F- E' s# R5 inches. There was no other family history of pre-% |8 k" Q* s7 z" F1 H6 ~
cocious sexual development in the first-degree rela-
0 Y% C$ g. o" K- ^7 H4 B) xtives. There were no siblings.& c" s5 J- Z; m: p' f7 L
Physical Examination
+ K: z2 o8 i* NThe physical examination revealed a very active, n- ]- R6 u0 k
playful, and healthy boy. The vital signs documented
" N" Y3 ]3 v2 T q6 Y7 ea blood pressure of 85/50 mm Hg, his length was
* h' g+ s8 q2 R: d! n90 cm (>97th percentile), and his weight was 14.4 kg
: c* o' U7 y M6 y# G! m: ](also >97th percentile). The observed yearly growth, w/ w: j+ N7 N8 B+ x7 ?7 F
velocity was 30 cm (12 inches). The examination of
& s/ O, s8 b4 z" cthe neck revealed no thyroid enlargement.
* ]# v: C- n% u6 JThe genitourinary examination was remarkable for
4 y9 ^! A g+ z- C# w4 C2 l$ tenlargement of the penis, with a stretched length of
( J- v! K3 l7 H% R6 R8 cm and a width of 2 cm. The glans penis was very well, H* e( a* L8 G2 ^- p- Y
developed. The pubic hair was Tanner II, mostly around4 S3 y! t# X4 e; w+ b1 @% v
540
G# ? ?; F4 zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
8 e2 i: m6 F7 t4 C) z7 Qthe base of the phallus and was dark and curled. The
6 H. l+ y# h- P* N# Ftesticular volume was prepubertal at 2 mL each.
) A7 r; s4 a- G$ j5 S2 y V) g1 PThe skin was moist and smooth and somewhat
) r9 K3 u( d* f( }3 p3 l, foily. No axillary hair was noted. There were no4 M- C3 C, J* `8 y1 o1 n) S& @/ Y
abnormal skin pigmentations or café-au-lait spots.
& j/ S( @) j1 T) \Neurologic evaluation showed deep tendon reflex 2+2 U% \, O* ]. W/ |1 T1 ^% z9 O
bilateral and symmetrical. There was no suggestion
- C5 c8 C9 Y3 ` m4 v9 p' q& c- B( ]6 m4 {7 Vof papilledema.
2 |6 b8 N6 s1 d" v2 v+ U& cLaboratory Evaluation
+ l$ F( \( v5 c+ j( X4 y% xThe bone age was consistent with 28 months by! N: ]1 \# D/ k0 _2 `5 \
using the standard of Greulich and Pyle at a chrono-2 P( c* t, e/ A. ?9 g( ^; d
logic age of 16 months (advanced).5 Chromosomal
3 B( ^$ s& H |+ Y6 V. H8 |karyotype was 46XY. The thyroid function test" a. n! f7 F- B) W/ O
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
1 J9 W: r4 S+ J4 U5 j# E) elating hormone level was 1.3 µIU/mL (both normal).
# v( f' A% ?6 Q _0 @The concentrations of serum electrolytes, blood
. h5 G$ O7 V/ C6 B; Xurea nitrogen, creatinine, and calcium all were3 F: c: y+ R" P
within normal range for his age. The concentration- v5 I7 ~% S. H+ `' G
of serum 17-hydroxyprogesterone was 16 ng/dL
) a8 G" } @; F5 h+ n9 b9 y(normal, 3 to 90 ng/dL), androstenedione was 20
6 o: k( b5 E& `& N% [, ]ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
* s" Q. |& Q: r) p; l. Eterone was 38 ng/dL (normal, 50 to 760 ng/dL),5 M8 d5 [1 U/ y
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
9 M5 \ Q% _1 g/ T49ng/dL), 11-desoxycortisol (specific compound S)
4 j: U) ~) H5 K+ v1 k5 N. w! a1 Dwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
9 e6 k$ n# M9 ttisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total3 |: @9 u$ j' _ b7 W
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),- o( r2 H/ G. j# h/ k
and β-human chorionic gonadotropin was less than! T8 z+ F7 K3 I7 f9 C
5 mIU/mL (normal <5 mIU/mL). Serum follicular% B) T! M% S1 g& {
stimulating hormone and leuteinizing hormone& _6 v2 T, w8 i+ ~- K8 f0 s
concentrations were less than 0.05 mIU/mL+ `1 _" y8 G, X$ R% y, y
(prepubertal).
" X9 I; P8 n5 }The parents were notified about the laboratory
' R& }, B: e! `& U1 k7 cresults and were informed that all of the tests were
+ ]- R' b0 b$ n6 g" Vnormal except the testosterone level was high. The* h% w3 l" }# \( b
follow-up visit was arranged within a few weeks to
' b- o; @" ^2 t+ n, k( U; Mobtain testicular and abdominal sonograms; how-6 f8 S* p) Q* m" y
ever, the family did not return for 4 months.+ V8 A3 `! @0 }3 U
Physical examination at this time revealed that the) m/ ^0 A0 V1 P
child had grown 2.5 cm in 4 months and had gained
6 @! o+ Q' B/ W! I2 kg of weight. Physical examination remained( v2 X- ~4 N" ?& _' K3 G
unchanged. Surprisingly, the pubic hair almost com-; c! o& I$ H2 K- t. _
pletely disappeared except for a few vellous hairs at
+ o0 u. E- l7 u" y; N! d' [( m) ]" G! Jthe base of the phallus. Testicular volume was still 2' D5 e7 l5 J9 \
mL, and the size of the penis remained unchanged.2 B7 Z4 a( t8 Y4 h
The mother also said that the boy was no longer hav-
# ?* Q& ?. C* _% Y% {+ z/ i9 S0 ding frequent erections.
6 ]/ {1 _2 z3 q0 C, r# V$ k' a/ HBoth parents were again questioned about use of
- h2 @- q4 ~' many ointment/creams that they may have applied to
* }, N& E3 D6 U7 G8 sthe child’s skin. This time the father admitted the
6 g& e: u* R# B* p- O8 vTopical Testosterone Exposure / Bhowmick et al 541
3 P: q0 R6 ^, D* Vuse of testosterone gel twice daily that he was apply-& j! ]) ~( T/ Y* a5 t E& Z7 V
ing over his own shoulders, chest, and back area for, u- g8 r* n- S* S [+ Q- t
a year. The father also revealed he was embarrassed
% J& ?9 Y9 f/ w* X* c' c* P# Rto disclose that he was using a testosterone gel pre-1 L7 }: q/ S9 _! F
scribed by his family physician for decreased libido! j5 ? D* f, t% T
secondary to depression.8 @( ^) m* Y: i
The child slept in the same bed with parents.
( m) d, S7 k0 `1 R. |; s" IThe father would hug the baby and hold him on his2 W/ `, C5 q8 @* w5 t4 b& S0 S2 u
chest for a considerable period of time, causing sig-9 k: L4 J* c, @+ A
nificant bare skin contact between baby and father.
" B% r7 Y7 y/ C! h' W; YThe father also admitted that after the phone call,
/ F/ A( x7 D% O0 W: t- C; s+ |when he learned the testosterone level in the baby& x" y" O4 [4 _5 K' d) E7 b
was high, he then read the product information$ e6 e# b0 p% w% F4 Q/ b
packet and concluded that it was most likely the rea-
+ [+ n7 k: {0 e( g- nson for the child’s virilization. At that time, they
5 G. i4 W& E2 R, |decided to put the baby in a separate bed, and the! J) Q" \7 H( b# M4 l
father was not hugging him with bare skin and had- i7 ?; ?$ e- Y7 _2 ?) F# R7 [9 ^
been using protective clothing. A repeat testosterone" ^; S% B/ v; w0 D N
test was ordered, but the family did not go to the
7 k% `: W. f1 s; _laboratory to obtain the test.
% @) o* p: G( A* H S# _Discussion
" s2 x# ]' H, {6 j9 R& a$ p- i JPrecocious puberty in boys is defined as secondary
* x; T- z( s4 x) ]* x: [sexual development before 9 years of age.1,4. z# _6 x/ T% Q9 R6 T% Y
Precocious puberty is termed as central (true) when
. L% [% \3 o! {/ git is caused by the premature activation of hypo-+ U! P! t$ r4 W0 h
thalamic pituitary gonadal axis. CPP is more com-
" o p# |3 b; s6 a1 H* cmon in girls than in boys.1,3 Most boys with CPP% n$ M- H8 [' v3 T0 |$ n' i& m
may have a central nervous system lesion that is
1 |, X1 t. Q( P6 v' k B! T, X4 Jresponsible for the early activation of the hypothal-- H! N. T8 t, ]5 a! F
amic pituitary gonadal axis.1-3 Thus, greater empha-' c" v! l4 m! ~3 V S2 `. g3 Y
sis has been given to neuroradiologic imaging in$ g% l N( v2 {
boys with precocious puberty. In addition to viril-' j" r$ ]1 M; L- s% q* x' G: W
ization, the clinical hallmark of CPP is the symmet-
( D( m: {/ f2 \. }" W( Drical testicular growth secondary to stimulation by
. |2 s! v1 q2 L/ ^# j! Mgonadotropins.1,3
! J: ?8 o4 U3 FGonadotropin-independent peripheral preco-1 ~4 _' W& g1 R
cious puberty in boys also results from inappropriate4 p8 f7 k' [- T, K* ~
androgenic stimulation from either endogenous or
) d {) {: x2 a, x, I0 D( ~exogenous sources, nonpituitary gonadotropin stim-
8 e8 K! R$ B2 D2 B zulation, and rare activating mutations.3 Virilizing
- j& x+ S# R" c1 s! F; j; `, Econgenital adrenal hyperplasia producing excessive
% _3 x$ {+ w) Z5 ]0 N8 _; |- Xadrenal androgens is a common cause of precocious8 l# p4 }# k, B( r' \- l
puberty in boys.3,4/ a8 U e" q( _5 P+ h: V1 q
The most common form of congenital adrenal& |" k' D& z4 Z! ]
hyperplasia is the 21-hydroxylase enzyme deficiency.$ Z9 B) b( h, c) V2 o6 B9 Z% I( R8 W
The 11-β hydroxylase deficiency may also result in* ]- Z) C. p T/ D- t1 S) c- x% W- T& A
excessive adrenal androgen production, and rarely,
! x7 G* o* T" @8 _# L* oan adrenal tumor may also cause adrenal androgen
% q; h% K1 ]7 B, Yexcess.1,3
* v* v4 h1 N0 }1 q+ `, eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from; [3 q* u& T# p! a8 \
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
5 w+ H5 b$ c0 r, j4 d( MA unique entity of male-limited gonadotropin- W: g" [' Z5 ]7 t; `% f+ |
independent precocious puberty, which is also known6 c6 C- \! C0 \! t) E! _' w
as testotoxicosis, may cause precocious puberty at a
' _. T9 H' ~, R+ W1 q0 ^very young age. The physical findings in these boys5 a7 m/ m! m4 W3 X6 q/ E P
with this disorder are full pubertal development,
6 p" f; `' a7 W4 _including bilateral testicular growth, similar to boys
# _. p( k+ O( ^; Dwith CPP. The gonadotropin levels in this disorder/ [9 Z- N% Y1 D' M; Q9 t
are suppressed to prepubertal levels and do not show6 ~3 r( t! c% w
pubertal response of gonadotropin after gonadotropin-# Z0 b$ W# g" J
releasing hormone stimulation. This is a sex-linked0 [- S. Q! b+ p$ J+ c
autosomal dominant disorder that affects only, m( n* Y2 i. H; x0 Y
males; therefore, other male members of the family9 A ]/ e7 q5 Z' K5 T5 _
may have similar precocious puberty.3
' S E& M8 z7 b; SIn our patient, physical examination was incon-5 V& c5 w1 F, ?3 w5 @% r' y8 s
sistent with true precocious puberty since his testi-
- C% K9 p0 s& }# ^! Jcles were prepubertal in size. However, testotoxicosis
T( h* _# J) z$ U& m4 Cwas in the differential diagnosis because his father& q' ?1 `8 N( ]: z$ x$ `2 u
started puberty somewhat early, and occasionally,8 d% [4 C5 |# [ V
testicular enlargement is not that evident in the
$ B3 h3 ]6 N4 x& G1 V: Zbeginning of this process.1 In the absence of a neg-
6 s3 }1 w, s6 g5 C6 M4 qative initial history of androgen exposure, our
, W& A! ?# ~% ubiggest concern was virilizing adrenal hyperplasia,% W5 u2 U3 ^2 n: C# L8 E6 D
either 21-hydroxylase deficiency or 11-β hydroxylase& P% ~* ]" J2 m" b- V) d# w. v9 H
deficiency. Those diagnoses were excluded by find-+ B: F, Y0 ]& h8 p. R! {
ing the normal level of adrenal steroids.4 e y2 z A$ z6 Y& m4 C: H6 X
The diagnosis of exogenous androgens was strongly
' Q2 C' w _! u0 P S! csuspected in a follow-up visit after 4 months because
0 i, l6 c$ P5 H( m5 ^! g2 \the physical examination revealed the complete disap-
4 I4 h# a* [+ l) l' M) Spearance of pubic hair, normal growth velocity, and1 |0 S s7 m) {/ }! Y
decreased erections. The father admitted using a testos-
- `3 ^1 k0 o2 S9 V5 m9 iterone gel, which he concealed at first visit. He was
" n/ j9 R0 j t4 K% H. v2 [using it rather frequently, twice a day. The Physicians’6 g% S, [. Q/ N2 e/ I0 y6 n* E
Desk Reference, or package insert of this product, gel or: u4 C4 N+ h, r' N8 d" C4 }! O
cream, cautions about dermal testosterone transfer to$ O- A& x. x8 o+ [2 Z
unprotected females through direct skin exposure.$ T3 s4 g. J0 [8 W+ s
Serum testosterone level was found to be 2 times the
5 g7 C- s: u. W+ ubaseline value in those females who were exposed to0 N. g: m% F; H3 x8 Z" Q( g
even 15 minutes of direct skin contact with their male
5 ]; u2 p8 r! U1 j3 B' @/ z: [) Dpartners.6 However, when a shirt covered the applica-: m$ Y; H7 l! W% U$ x
tion site, this testosterone transfer was prevented.
3 m. a5 m' b# L/ E3 H* dOur patient’s testosterone level was 60 ng/mL,
3 f; d' g1 r$ {; t, Mwhich was clearly high. Some studies suggest that
& i% N8 X4 d T& l: e( X& N# cdermal conversion of testosterone to dihydrotestos-
* F4 w; w$ b" ?3 ?- \" kterone, which is a more potent metabolite, is more
! ^6 Z% X( C' f& c6 U& factive in young children exposed to testosterone& d: V/ D6 c* \& `1 ~- L
exogenously7; however, we did not measure a dihy-+ o& ]! K+ e5 N0 a
drotestosterone level in our patient. In addition to
: g9 F/ l4 W3 r! }+ {" m7 w- mvirilization, exposure to exogenous testosterone in! u" Q# b3 {3 n$ B& _
children results in an increase in growth velocity and$ c4 h$ S1 P- \1 C; Q! X
advanced bone age, as seen in our patient." t, T* p6 a+ C
The long-term effect of androgen exposure during
2 G$ Z0 V x: j# C' r+ p; P3 Hearly childhood on pubertal development and final# Y. C9 z# e' l2 b: X. d
adult height are not fully known and always remain
. b1 Q- `7 j) w3 aa concern. Children treated with short-term testos-8 ]9 b2 }4 q. Q4 ?. O/ D+ G7 B
terone injection or topical androgen may exhibit some# L2 G: o# g% C$ `
acceleration of the skeletal maturation; however, after' i1 [! O3 `4 d, A8 A; n3 C
cessation of treatment, the rate of bone maturation5 m' k* f) R L0 z! ^
decelerates and gradually returns to normal.8,9
/ X5 O; X M1 [/ `+ m$ _* ]There are conflicting reports and controversy
) V. r3 u0 U, T# Z1 E9 O7 d* Zover the effect of early androgen exposure on adult
8 ^5 g s B% X$ M! Jpenile length.10,11 Some reports suggest subnormal
; Y( {( d0 A0 r6 C) P8 `adult penile length, apparently because of downreg-
/ l( t+ }: l( T4 c& Aulation of androgen receptor number.10,12 However,! r0 v* D! ^: ?/ U
Sutherland et al13 did not find a correlation between
7 B- \' J7 s {childhood testosterone exposure and reduced adult+ E. r) w4 o5 J( l
penile length in clinical studies.. f6 q# w/ X& G. s# U0 F
Nonetheless, we do not believe our patient is7 A* w4 w5 l& `
going to experience any of the untoward effects from0 D: o. l0 _* }$ s
testosterone exposure as mentioned earlier because7 _3 W9 {+ |2 _7 I
the exposure was not for a prolonged period of time.
* U& n1 `0 l. s8 R8 t$ eAlthough the bone age was advanced at the time of! Y# P- a5 e, \; n6 i# h* V
diagnosis, the child had a normal growth velocity at
( }8 L/ R; c1 Xthe follow-up visit. It is hoped that his final adult3 G- n. t! Z) P- s4 Y. t
height will not be affected.6 }; W+ l- J3 N
Although rarely reported, the widespread avail-2 Q+ Y/ a& Y/ T" j4 @1 b$ f- ?
ability of androgen products in our society may4 C% M0 e8 N1 G, m# U
indeed cause more virilization in male or female
7 X) ~1 @+ s. I7 }* c# F; h" N4 Lchildren than one would realize. Exposure to andro-
' ^/ K, u# e5 V: k h+ m8 Ugen products must be considered and specific ques-
3 Y# o4 G: z3 Y0 S0 u- ^9 t. o3 U- U, {tioning about the use of a testosterone product or- ~, n. h* C& c$ ?6 `( M4 G
gel should be asked of the family members during
" [- s. P8 t8 D% gthe evaluation of any children who present with vir-
7 y+ i( K% z0 s; w- M: m8 Y/ E: {8 a \ilization or peripheral precocious puberty. The diag-
" B# S2 l+ L- xnosis can be established by just a few tests and by( b4 q4 Y7 B; [- @' V- N/ ^
appropriate history. The inability to obtain such a6 {$ R1 M9 g8 I( Z: j+ x
history, or failure to ask the specific questions, may8 P& C2 l: x7 X. Q4 X
result in extensive, unnecessary, and expensive8 g/ y D% T1 ]# Z
investigation. The primary care physician should be% |3 G* N4 c6 M* }& f% ]
aware of this fact, because most of these children# y9 h$ q0 A i$ Y4 H
may initially present in their practice. The Physicians’) \9 T; N; {& `) s7 V
Desk Reference and package insert should also put a/ c$ g( |4 s ^4 W2 }; a n
warning about the virilizing effect on a male or
1 v% P9 o* e* v0 Y' U6 dfemale child who might come in contact with some-
$ t/ P) e) u+ S% `9 H" eone using any of these products.7 X* q& l3 _( z; x' W
References
% N/ ?3 ~# o2 }4 p1. Styne DM. The testes: disorder of sexual differentiation
7 t( U0 y2 P8 cand puberty in the male. In: Sperling MA, ed. Pediatric/ {) y7 D9 V' g; ?$ z' e2 \) j
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
) @: q1 E7 u; ?. ^4 n0 G2002: 565-628.
5 c% O1 `, `% M5 b2 j2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
3 I3 E2 i( w- w3 e: |9 Bpuberty in children with tumours of the suprasellar pineal$ K5 N4 y7 f( B
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from0 E w) g2 t7 t q
Topical Testosterone Exposure / Bhowmick et al 543! X# ~- r4 X, @1 E
areas: organic central precocious puberty. Acta Paediatr.
/ z Q1 x: n2 a. {! o2001;90:751-756.
/ J6 |# p8 ], q7 S3 ]! a1 N3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.. _% j& l! A$ A. E. F' i9 i
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
3 |6 O. f' p6 D! X Z! V8 {( pDekker Inc; 2003:211-238.
' }7 F6 q& `* e: p5 m4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual4 P* [- r5 h6 P
development in a two-year-old boy induced by topical8 u( y/ S5 U1 ?( z4 W# Q2 R
exposure to testosterone. Pediatrics. 1999;104:e23.
. }: g) r; t) ~8 y0 ]5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
4 ?: g/ ?" n- ]0 ?( Z" q. NSkeletal Development of the Hand and Wrist. 2nd ed.
9 K. N. ^: n* x+ i: m& r+ t+ c* fStanford, CA: Stanford University Press; 1959.
/ a0 ?- N+ G5 M) R! t' L) J6. Physicians’ Desk Reference. Androgel 1% testosterone,
& Y# x8 p; T7 \Unimed Pharmaceutical Inc. Montvale, NJ: Medical6 k2 R; V8 {! i5 d9 {5 s
Economics Company, Inc; 2004:3239-3241.
/ T: d f W1 X7 j% n" Z7. Klugo RC, Cerny JC. Response of micropenis to topical+ S8 H3 u" Z+ ?% B4 ^
testosterone and gonadotropin. J Urol. 1978;119:
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