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is a significant concern for physicians. Central9 ~! G9 |; k4 l
precocious puberty (CPP), which is mediated- y+ h7 C9 Z4 C1 D5 E
through the hypothalamic pituitary gonadal axis, has
9 L2 }! J& t% D9 u8 p# x# _7 na higher incidence of organic central nervous system
2 |' [) {4 |. e) ]4 m0 b2 Glesions in boys.1,2 Virilization in boys, as manifested
$ N( ^5 _+ Q: i: U W% c: Jby enlargement of the penis, development of pubic
# ^1 P- K- g X! B- v ohair, and facial acne without enlargement of testi-. g; n) Z8 {7 `4 X
cles, suggests peripheral or pseudopuberty.1-3 We5 m8 Y( `$ J4 ~$ F8 v! F4 X
report a 16-month-old boy who presented with the
7 G/ z; W3 x9 k' Benlargement of the phallus and pubic hair develop-. D/ T& `/ J1 S1 ?
ment without testicular enlargement, which was due2 {3 d" H% a! C( T, Q
to the unintentional exposure to androgen gel used by* d8 ~1 z7 e- _5 b2 Y1 N* @: Q
the father. The family initially concealed this infor-
' w/ z# f8 ^# c, O6 ymation, resulting in an extensive work-up for this
, F# b" x: w5 ^' J4 U8 r |child. Given the widespread and easy availability of
- u* i; n) W0 M% M& ~: Y+ H7 |testosterone gel and cream, we believe this is proba-6 a7 b1 M. N" x4 C* ?" n
bly more common than the rare case report in the N7 w1 J, a7 ^
literature.4+ `: A7 c8 L! R$ B5 m7 F: Z# M
Patient Report
' r3 Q% o5 {$ P" n N4 x/ w0 v$ _A 16-month-old white child was referred to the
. F O/ h2 J$ aendocrine clinic by his pediatrician with the concern; O0 y+ E1 g5 R8 _$ L
of early sexual development. His mother noticed. f9 x' c0 e- J- Z
light colored pubic hair development when he was7 f# w; G: Y' j& [" r+ V
From the 1Division of Pediatric Endocrinology, 2University of" J$ e# I1 e9 G/ x. `$ A8 E
South Alabama Medical Center, Mobile, Alabama.
( e8 ?4 n/ F# xAddress correspondence to: Samar K. Bhowmick, MD, FACE,
! a m1 I: j# [+ K2 G9 r, e9 s8 {Professor of Pediatrics, University of South Alabama, College of
; W" U; o. h" D: yMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;* z6 v5 ^* c- {) n" }0 `2 Q% U9 I
e-mail: [email protected].
* n1 @( X/ b) s2 uabout 6 to 7 months old, which progressively became% }( u8 s+ M5 K: k4 ~' \
darker. She was also concerned about the enlarge-, I! G, r% J" c/ n5 D& l+ n( p( F
ment of his penis and frequent erections. The child
5 n' T! S2 Q- uwas the product of a full-term normal delivery, with) ?/ o0 ]8 ?6 w! G2 a1 x
a birth weight of 7 lb 14 oz, and birth length of
) n2 @ g6 t" ^3 m; S1 X" B/ b20 inches. He was breast-fed throughout the first year
# M( Y$ v" s+ l' ]+ _of life and was still receiving breast milk along with$ D4 X- H1 m8 U! j
solid food. He had no hospitalizations or surgery,3 w9 l" o1 r& _
and his psychosocial and psychomotor development
e6 t* p" T4 jwas age appropriate.
, n5 o" e2 N: u* X j/ L& l* hThe family history was remarkable for the father,
( o% L$ ]9 `% Ywho was diagnosed with hypothyroidism at age 16,
" C( Q- ]! c9 p Owhich was treated with thyroxine. The father’s
; J0 }' c+ B7 Q. m2 wheight was 6 feet, and he went through a somewhat6 C" n J i5 v
early puberty and had stopped growing by age 14.6 T, Z5 b6 V: f4 A
The father denied taking any other medication. The
- I% a8 \$ W& r+ t+ A2 D+ J. Dchild’s mother was in good health. Her menarche
' d" m7 s* w! L, Twas at 11 years of age, and her height was at 5 feet ?% w- r, i' H+ X2 f/ _# ]0 r
5 inches. There was no other family history of pre-/ a' b) J7 n- G: u
cocious sexual development in the first-degree rela-
. b- ]- X4 ~1 a2 }tives. There were no siblings.! I; e2 h( k) \' W
Physical Examination9 r: {# d" _4 V- a
The physical examination revealed a very active,: r8 A; ^* V* w4 n8 Z! J& C
playful, and healthy boy. The vital signs documented
. ^4 G* z/ ?" Ga blood pressure of 85/50 mm Hg, his length was
" A$ F; J) c0 j' a; x) {90 cm (>97th percentile), and his weight was 14.4 kg
* k0 o9 m8 X/ F. Y1 I(also >97th percentile). The observed yearly growth& p- b, ]. i, X9 E- M$ V
velocity was 30 cm (12 inches). The examination of# b* W5 H8 d1 W8 F9 t
the neck revealed no thyroid enlargement.
' O5 \: L% X* Y+ q, I2 fThe genitourinary examination was remarkable for
4 K8 Y e6 y' i& ^* j+ qenlargement of the penis, with a stretched length of
" s) J. h$ z& ^, l" z8 cm and a width of 2 cm. The glans penis was very well
H. E8 }# F6 A X/ o4 Qdeveloped. The pubic hair was Tanner II, mostly around2 J( b1 F; c3 V0 {6 I% n/ `
540
7 l+ k( }8 g h7 vat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* y, i0 D& J' Q1 s+ g- Zthe base of the phallus and was dark and curled. The
6 A& J& w6 g! O6 A" K* ?. Ftesticular volume was prepubertal at 2 mL each.
! R9 b- r, M0 O: jThe skin was moist and smooth and somewhat% S* R4 {! Q8 P. \" {
oily. No axillary hair was noted. There were no
7 A) U; r/ y/ i {3 p4 Wabnormal skin pigmentations or café-au-lait spots.
6 ?2 w9 h+ J$ s2 t/ \' C9 UNeurologic evaluation showed deep tendon reflex 2+
- O0 b8 C G. F& [- ?$ zbilateral and symmetrical. There was no suggestion
, i( h B3 s; o4 O& A yof papilledema.0 T+ c H# i4 g" u3 f8 a, ^
Laboratory Evaluation' f w+ U3 E# e# q9 E% S4 ^- U5 Q
The bone age was consistent with 28 months by
0 `/ l& k( j9 }7 E' Q$ K3 K$ d, L, Yusing the standard of Greulich and Pyle at a chrono-
$ y1 G+ @) i1 Clogic age of 16 months (advanced).5 Chromosomal1 D" j4 v; z+ {$ I2 i, ^5 O8 U+ V
karyotype was 46XY. The thyroid function test
|7 J; c- C2 j3 yshowed a free T4 of 1.69 ng/dL, and thyroid stimu-% F; N$ [5 N" `$ v- H: B3 }
lating hormone level was 1.3 µIU/mL (both normal).* ~5 v3 p1 f4 A- I! y+ |
The concentrations of serum electrolytes, blood& f4 P3 y/ ?' \8 P7 x, I
urea nitrogen, creatinine, and calcium all were
, {4 m1 v1 T, t9 Owithin normal range for his age. The concentration: J L6 d+ Q4 T/ q+ N9 I3 U
of serum 17-hydroxyprogesterone was 16 ng/dL
+ d% p+ F1 C/ O: \- r) ]$ u2 N$ o(normal, 3 to 90 ng/dL), androstenedione was 202 _/ ]0 }* J0 K
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-" _/ O' K1 n% f# H% C/ z
terone was 38 ng/dL (normal, 50 to 760 ng/dL),9 ~* H: M- E* k. o6 \" Q
desoxycorticosterone was 4.3 ng/dL (normal, 7 to9 v9 f# U1 d1 d' J* J
49ng/dL), 11-desoxycortisol (specific compound S)
# z) M0 K: E' Q. [ Mwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
/ C/ Q+ O: J$ Z0 Ltisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total& g3 r6 d7 ~0 }, v8 |. S) y
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
0 W, R) I0 a' A& ^+ [; k. Jand β-human chorionic gonadotropin was less than
( w: T4 ?+ B, ?+ S5 J+ _5 mIU/mL (normal <5 mIU/mL). Serum follicular/ ^# r7 j$ X: i) x3 D0 `
stimulating hormone and leuteinizing hormone
8 j* S- @* m0 X4 |) Z& qconcentrations were less than 0.05 mIU/mL
) v1 M- N5 h8 a" W1 p8 E5 H(prepubertal).
1 _! t2 E5 a) H$ J; ^/ LThe parents were notified about the laboratory
" x$ \* j6 ~; [8 i5 Nresults and were informed that all of the tests were& m) P3 `& ~& ~( i' ?+ D; M
normal except the testosterone level was high. The" g+ F0 K# n! \' Q
follow-up visit was arranged within a few weeks to
& J6 w n H' _& tobtain testicular and abdominal sonograms; how-
1 q5 o7 u1 U9 K8 x; ?: |: X5 N$ ^ever, the family did not return for 4 months.
% x6 ]/ L. `8 Q& \8 b- }8 CPhysical examination at this time revealed that the
* ]& V" d* d! ?, Z* Z/ B1 P) Qchild had grown 2.5 cm in 4 months and had gained
' J: K4 c; s- c" t6 p" G2 kg of weight. Physical examination remained
) N; g {! K: G& u3 `unchanged. Surprisingly, the pubic hair almost com-1 E+ A! x* `5 r& q4 |/ ~% g
pletely disappeared except for a few vellous hairs at: o4 b, l. [% z) w! J
the base of the phallus. Testicular volume was still 2
7 l$ v C* |& w5 d4 [5 r4 s, Q1 gmL, and the size of the penis remained unchanged.
! l* ?) p" t5 a5 qThe mother also said that the boy was no longer hav-2 r% q" V' }3 ]# h8 f6 q
ing frequent erections.
/ S7 B) y7 W PBoth parents were again questioned about use of3 Y3 q8 d) k! \* z
any ointment/creams that they may have applied to+ i8 D y' z/ J
the child’s skin. This time the father admitted the
- q3 d! i N! w# E* t) S, sTopical Testosterone Exposure / Bhowmick et al 541+ {8 V/ h* E5 X6 h; c {
use of testosterone gel twice daily that he was apply-
1 \- y- _4 j. `, cing over his own shoulders, chest, and back area for1 s6 r9 s. P8 y- X8 ]/ o
a year. The father also revealed he was embarrassed
% j1 e# Z# m; J' V2 z3 c/ ]8 L0 u0 nto disclose that he was using a testosterone gel pre-
; i7 Y0 p- e2 h5 W: L7 c/ jscribed by his family physician for decreased libido# B( N& a2 q) Y7 {$ ?
secondary to depression.8 \+ B0 D* j7 H( x6 R
The child slept in the same bed with parents.
2 _) m. Z' Y- Y8 yThe father would hug the baby and hold him on his7 x7 ^6 e% v6 E: P
chest for a considerable period of time, causing sig-* B1 M3 X r& Y- y- O' A! p
nificant bare skin contact between baby and father.
' W# n2 E: x$ S! @' U, m- o" OThe father also admitted that after the phone call,
1 z3 R3 l% t: m9 P# p3 X/ ywhen he learned the testosterone level in the baby
/ N: [) s3 F# B+ W+ H' r3 h. `5 swas high, he then read the product information5 i5 K6 I$ b6 ]% J
packet and concluded that it was most likely the rea-* @6 ]: H- g1 x. [& z, J" k
son for the child’s virilization. At that time, they
1 I/ j* M$ ?% |; w, i5 Cdecided to put the baby in a separate bed, and the& G; q( o: }& ~! ?1 h
father was not hugging him with bare skin and had7 U! ?5 s9 B3 E; o2 D5 o5 d, ]
been using protective clothing. A repeat testosterone
: [& y' C% Q+ y- O6 @) mtest was ordered, but the family did not go to the; }, t7 u1 a: K* S8 g& q
laboratory to obtain the test.
6 D% z; f& I; P4 cDiscussion# Y- Y. b. @5 J
Precocious puberty in boys is defined as secondary0 s# k) r7 \; h) {. k
sexual development before 9 years of age.1,4# p4 O. k( m: X% v n
Precocious puberty is termed as central (true) when# h2 P2 M# b8 E. u. E. C
it is caused by the premature activation of hypo-
* B/ U9 U! s& e4 J2 j- lthalamic pituitary gonadal axis. CPP is more com-
% p0 }( w% ]. }3 X8 g& c( Qmon in girls than in boys.1,3 Most boys with CPP. H0 B1 p( L+ l% p& Y
may have a central nervous system lesion that is2 T" k* u; o9 A
responsible for the early activation of the hypothal-- J" ]: b: O- _: Z2 W
amic pituitary gonadal axis.1-3 Thus, greater empha-7 i1 H" `7 h0 E5 n! y) X0 Y
sis has been given to neuroradiologic imaging in3 G; B9 r) F! j; _- f/ Z M
boys with precocious puberty. In addition to viril-
7 h/ ?. H% K* n0 H/ Yization, the clinical hallmark of CPP is the symmet-
8 i/ x5 s9 I9 O2 P3 _1 `5 Nrical testicular growth secondary to stimulation by- L) N8 u$ l* g" ?1 Q7 b
gonadotropins.1,3
3 p% O" j) V2 U8 ^5 TGonadotropin-independent peripheral preco-& j% y3 ^1 E4 G% m& T C3 `( ~
cious puberty in boys also results from inappropriate
" j& n1 h1 L' C+ l' m0 M8 J H0 [androgenic stimulation from either endogenous or
% a, }+ N9 H4 Z d- G6 }exogenous sources, nonpituitary gonadotropin stim-4 C0 I4 f8 g) K7 s- g1 P
ulation, and rare activating mutations.3 Virilizing9 x6 O3 t2 O" S
congenital adrenal hyperplasia producing excessive. n! K/ ^0 H# J
adrenal androgens is a common cause of precocious
f, v7 f6 J. z& z; Epuberty in boys.3,4
: n4 f4 x. `" y1 t$ oThe most common form of congenital adrenal
a" I0 _8 r, j4 Z& Q; T# m/ f7 [hyperplasia is the 21-hydroxylase enzyme deficiency.4 x0 O8 j2 m* N7 s- h* Z
The 11-β hydroxylase deficiency may also result in! z& O& K2 H! D: @! g
excessive adrenal androgen production, and rarely,! M' N$ \/ j9 t- U
an adrenal tumor may also cause adrenal androgen
% N7 f( k; N+ G5 uexcess.1,38 h$ j! W2 ~; x' i* K0 F/ o
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* a9 h/ I# G/ v# P4 V542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
Y; r. U9 P" Y7 d, w/ C% `A unique entity of male-limited gonadotropin- l. H& q$ ?$ e( y6 p' H s& e
independent precocious puberty, which is also known# l2 ~* C9 W% j! ?; G
as testotoxicosis, may cause precocious puberty at a
/ J. K! B3 ?; b% R0 Lvery young age. The physical findings in these boys
0 ~+ Q) N; j' ~8 cwith this disorder are full pubertal development,' u5 f/ ^! F0 H" u
including bilateral testicular growth, similar to boys
; N. o( ~% p! b ]% n" {2 P6 kwith CPP. The gonadotropin levels in this disorder
: T# I( e! a) f) Ware suppressed to prepubertal levels and do not show
3 n! r2 J9 @; n5 S5 X- Jpubertal response of gonadotropin after gonadotropin-
2 E9 q$ [% i: U1 N+ Greleasing hormone stimulation. This is a sex-linked" }( k0 a. q: F3 b+ {/ B M7 W2 D
autosomal dominant disorder that affects only
8 D8 J$ B; t5 M3 Qmales; therefore, other male members of the family
}# P/ p) p+ n+ {7 ^5 J6 gmay have similar precocious puberty.37 g/ P, W- h, J* z# b! [/ l2 A( ^% v
In our patient, physical examination was incon-
* y5 m$ L! n3 U1 k: K$ D$ |; d J9 zsistent with true precocious puberty since his testi-
8 f1 H ~, x/ z6 u2 `7 i* ]cles were prepubertal in size. However, testotoxicosis+ T8 k+ B$ O; `4 z
was in the differential diagnosis because his father
; I# n5 W5 k& i& T; l' g% Sstarted puberty somewhat early, and occasionally,
& W2 s( o$ n& s: w! w# ^testicular enlargement is not that evident in the0 W* R) f, a( c
beginning of this process.1 In the absence of a neg-) E1 G3 I: U5 q, b ~) G2 F
ative initial history of androgen exposure, our' n3 @5 `2 q& D4 {0 p- L# O
biggest concern was virilizing adrenal hyperplasia,
6 ~! |; R5 Q6 weither 21-hydroxylase deficiency or 11-β hydroxylase Q, G3 d. ^4 `. ]! r( v4 I, L
deficiency. Those diagnoses were excluded by find-9 A1 w7 T! y n6 X
ing the normal level of adrenal steroids.
/ B+ Z( R# L. R2 Q& x HThe diagnosis of exogenous androgens was strongly0 T- H8 e) g. i' D. y [
suspected in a follow-up visit after 4 months because& ?1 g8 q* L: F. N* K/ {
the physical examination revealed the complete disap-0 ?% y3 }: J4 ?8 c/ U, l
pearance of pubic hair, normal growth velocity, and
" J: {# ^* q: V f) W$ Gdecreased erections. The father admitted using a testos-+ }. d6 ~" ~3 Z8 v5 W' X2 l
terone gel, which he concealed at first visit. He was/ B; \# ?4 L" W; m- o7 D/ A1 `9 r
using it rather frequently, twice a day. The Physicians’1 F( d- {7 N8 Z9 q6 N
Desk Reference, or package insert of this product, gel or
1 b& t/ H }8 K: Xcream, cautions about dermal testosterone transfer to
, k ~9 w; `+ I2 L1 ]- p: [8 runprotected females through direct skin exposure.
! c' ^, {. ]6 ^' K0 }! bSerum testosterone level was found to be 2 times the
0 w4 M( f# b" h' Ibaseline value in those females who were exposed to
5 L# c# W1 K$ N' m% }( I2 {. neven 15 minutes of direct skin contact with their male
7 ?, |4 w) n+ \* b vpartners.6 However, when a shirt covered the applica-
8 h: `+ z3 S4 d* C( v0 |tion site, this testosterone transfer was prevented.' [% ?, F& }/ j" H; _" p
Our patient’s testosterone level was 60 ng/mL,
* a* }7 ?. x0 {8 }* J' Xwhich was clearly high. Some studies suggest that
2 u3 G9 M9 Y9 d: tdermal conversion of testosterone to dihydrotestos-0 c" ~; E9 |: U; G6 J+ p
terone, which is a more potent metabolite, is more
- x+ M9 F$ g0 D9 y. aactive in young children exposed to testosterone
" a% v% z( G7 c3 Q, dexogenously7; however, we did not measure a dihy-
1 N" P$ u+ k! X( h4 m! Hdrotestosterone level in our patient. In addition to
}3 j$ f1 D T/ [virilization, exposure to exogenous testosterone in
' g% [! v0 H R; f# Z# \5 echildren results in an increase in growth velocity and5 a9 X5 W" M v% ^
advanced bone age, as seen in our patient.% P8 r$ a4 C; U ^" t6 e
The long-term effect of androgen exposure during9 d) n' {9 ?2 x
early childhood on pubertal development and final" t* K: R. l) |5 \6 M1 g5 M
adult height are not fully known and always remain* G2 L2 d5 ]2 @6 w* Q; c: q, W7 ~
a concern. Children treated with short-term testos-
5 ?' G4 m, A& ]2 `7 F9 ^/ w) ^terone injection or topical androgen may exhibit some
" c S6 r; q! Vacceleration of the skeletal maturation; however, after8 S8 H. {4 }$ O1 z
cessation of treatment, the rate of bone maturation
" s9 b0 x, a" L% @0 C- vdecelerates and gradually returns to normal.8,9
5 f# c9 U# J& K+ JThere are conflicting reports and controversy
' ^: t: Q& b) ?& fover the effect of early androgen exposure on adult! h0 o7 p, C# w. e, ~' I. e
penile length.10,11 Some reports suggest subnormal
1 v/ H3 h6 l5 H3 Fadult penile length, apparently because of downreg-
# S3 M, s* h- X' g7 S. d: T; fulation of androgen receptor number.10,12 However,+ c0 @" y/ G2 n
Sutherland et al13 did not find a correlation between
3 A; \7 [/ B( z$ z# n& o$ [childhood testosterone exposure and reduced adult
- J; R7 g6 r1 p/ Bpenile length in clinical studies.
; ?2 Q. u" O9 aNonetheless, we do not believe our patient is# _2 ^) ]# \; k V
going to experience any of the untoward effects from) v; L9 E- j0 e9 v" @
testosterone exposure as mentioned earlier because
* |6 Q0 `" o& C4 l. y- C* wthe exposure was not for a prolonged period of time.
; Y: K, `$ ?# ^0 A" k* i& n) zAlthough the bone age was advanced at the time of
/ }7 a; p. Q; \diagnosis, the child had a normal growth velocity at7 |% Q4 [+ g6 x3 C
the follow-up visit. It is hoped that his final adult
* D) Y5 B, ]3 q' e. {3 R- @height will not be affected.
& \0 W. T& I X' ^! cAlthough rarely reported, the widespread avail-
; T Y$ D D) e2 w; t) } mability of androgen products in our society may
$ a4 @0 k% S; Kindeed cause more virilization in male or female
! ]1 Y. Q8 b& t; x" B! L9 Dchildren than one would realize. Exposure to andro-
$ ~1 [ v) }1 ^# v5 e( i J3 U5 Ggen products must be considered and specific ques-
) E% D8 R! K4 n$ ~5 ]7 P, s1 c. X: r4 ?tioning about the use of a testosterone product or
7 [0 Y, v9 ?9 x' U, A6 Lgel should be asked of the family members during
' `9 l$ K; r: V% Bthe evaluation of any children who present with vir-8 t+ u6 ~ P0 l C* g
ilization or peripheral precocious puberty. The diag-
. l0 h+ F# i: P$ e6 onosis can be established by just a few tests and by6 a" H! B. ^: W! n) U, f2 E
appropriate history. The inability to obtain such a5 f$ |- v; i( T% b$ b1 w# k _% J
history, or failure to ask the specific questions, may
; O. e U2 V- B5 l2 m4 ]8 [result in extensive, unnecessary, and expensive
, W3 n+ T6 Y/ B$ N( X1 _investigation. The primary care physician should be
' Q0 s: C5 B7 k. _! U! Y6 Yaware of this fact, because most of these children. L5 Z, p; b5 {/ q
may initially present in their practice. The Physicians’
! O% w5 [6 ^* ~: q* ?Desk Reference and package insert should also put a
0 h8 c, C1 E# N/ b g! y; d+ \% Awarning about the virilizing effect on a male or" r- U" ~; ~3 h
female child who might come in contact with some-- m, c# E5 j0 s1 G2 q e
one using any of these products.
: |1 Y6 n: T O7 oReferences' [* H% W' d2 w) j$ C* b7 k- m
1. Styne DM. The testes: disorder of sexual differentiation! ~) b4 }) i, V: R$ u2 O: F P
and puberty in the male. In: Sperling MA, ed. Pediatric$ A5 t; I) ]) m8 M7 o) r
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;4 N+ Z7 U5 h$ t+ @8 f% U4 j
2002: 565-628.8 E3 O4 B' d2 I3 g- p) |; j" S' E
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious3 N- r- O4 I" @, h Y2 a2 `) X
puberty in children with tumours of the suprasellar pineal
) y5 X& p0 e7 J" Z: `0 B2 @6 \at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
8 a! y+ r6 t+ u1 v9 kTopical Testosterone Exposure / Bhowmick et al 5438 d5 N; E! s4 W! O
areas: organic central precocious puberty. Acta Paediatr.
. h3 Y# l* h+ Z5 B3 o2001;90:751-756.
5 x6 z% L! I/ y2 t1 ?; Y* }3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
& W* q2 j8 w% qPediatric Endocrinology. 4th ed. New York, NY: Marcel+ Z H5 U( E; y6 U1 t
Dekker Inc; 2003:211-238.
: Q4 d- m! s- y8 y( c4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
6 m: X1 D9 E2 I' f1 D9 Cdevelopment in a two-year-old boy induced by topical6 k N, t$ i( O6 ], P X# U
exposure to testosterone. Pediatrics. 1999;104:e23.
! \- ]- }8 L. b" n; ~5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
$ X W) ^3 v T1 ^Skeletal Development of the Hand and Wrist. 2nd ed.
3 C# e4 u0 V" m L7 b- eStanford, CA: Stanford University Press; 1959.
( U' |$ F7 b9 m6. Physicians’ Desk Reference. Androgel 1% testosterone,
0 } N0 B5 L: p: @$ j: ^Unimed Pharmaceutical Inc. Montvale, NJ: Medical
% f0 ^9 Z3 H# |6 eEconomics Company, Inc; 2004:3239-3241.
, ?! t6 c! y& X' p, t- {; s7. Klugo RC, Cerny JC. Response of micropenis to topical5 G$ u; z e1 O& ?5 L
testosterone and gonadotropin. J Urol. 1978;119:
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