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is a significant concern for physicians. Central& l9 {, l, O' H; H0 @& U
precocious puberty (CPP), which is mediated5 k/ h, O% p9 z R1 \
through the hypothalamic pituitary gonadal axis, has
; l; O7 M8 A- H4 Z- B! Xa higher incidence of organic central nervous system0 z0 b, S" O# @, m" J: _) i; d
lesions in boys.1,2 Virilization in boys, as manifested
' @* e1 _ f4 l5 Q9 n2 qby enlargement of the penis, development of pubic5 b( G# e5 A3 p3 S- U$ i! O
hair, and facial acne without enlargement of testi-
" P p7 ` m2 G3 H) ^- Ccles, suggests peripheral or pseudopuberty.1-3 We* r ^; m R( l; k
report a 16-month-old boy who presented with the
# p0 n: q7 D4 J0 u, p! w# denlargement of the phallus and pubic hair develop-
8 d4 r$ S7 X8 K, P- Nment without testicular enlargement, which was due
Y) T' L" a. u7 ]# tto the unintentional exposure to androgen gel used by
/ @7 V% f/ Y) R% c5 R* T" t1 g0 E- Lthe father. The family initially concealed this infor-/ E- L; _; U! o7 J* D; F
mation, resulting in an extensive work-up for this
) Q+ d0 {1 d3 e$ D8 |child. Given the widespread and easy availability of0 B0 { l; V+ k- I
testosterone gel and cream, we believe this is proba-
& e. d j) m& }: j' f0 o" |bly more common than the rare case report in the; Q* `& r6 C7 r9 t% V
literature.4+ k2 `; A- P; r. w
Patient Report, b. k3 N3 H' N6 ?* n7 L. X
A 16-month-old white child was referred to the, b4 r/ {) [4 }
endocrine clinic by his pediatrician with the concern! U# Q. l# { A: |$ O# e
of early sexual development. His mother noticed+ ?! o2 n/ |) @9 f# r4 R
light colored pubic hair development when he was. j+ V- K- C$ r; A* l. w/ z- J
From the 1Division of Pediatric Endocrinology, 2University of8 v4 F) O) Q' K
South Alabama Medical Center, Mobile, Alabama.
/ t! Q' z5 A1 o/ \& R! g" n9 VAddress correspondence to: Samar K. Bhowmick, MD, FACE,& `- A) t: u# `; r- }7 {- G
Professor of Pediatrics, University of South Alabama, College of
% f. n* C3 e* B, s6 iMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;2 l8 S% Q$ U4 [( y( X9 h4 T
e-mail: [email protected].
4 I2 G3 C. V7 K) h4 Sabout 6 to 7 months old, which progressively became/ D8 Z! \. T: |/ Q) O7 B
darker. She was also concerned about the enlarge-" o, J6 u9 h; M# F0 |
ment of his penis and frequent erections. The child
0 W4 s: ~& G* E3 d& f/ ]$ w+ fwas the product of a full-term normal delivery, with
( h7 K9 Y5 D- k0 P% e0 A7 j1 ma birth weight of 7 lb 14 oz, and birth length of
; E) o/ z' }+ X4 Y" j( Q20 inches. He was breast-fed throughout the first year9 E( f3 O$ U! W ?8 F+ g
of life and was still receiving breast milk along with5 t; i( U" f- }, b; q- N
solid food. He had no hospitalizations or surgery,
/ G ]* X1 K/ X% Zand his psychosocial and psychomotor development1 A2 r0 B( c: ^. T2 }) \
was age appropriate." t9 l2 @" y- W/ x
The family history was remarkable for the father,
2 y3 w6 }, X' b% {1 B; ]% Pwho was diagnosed with hypothyroidism at age 16,
6 Y3 h, ]% P, r6 W8 Iwhich was treated with thyroxine. The father’s+ @# S+ b2 J U: v, n! ^8 L/ ~
height was 6 feet, and he went through a somewhat V- {$ R4 U8 T4 I. m
early puberty and had stopped growing by age 14.8 v! a, Q; h5 b" [9 W+ [# ]
The father denied taking any other medication. The, T, F l" s. b( k3 Y
child’s mother was in good health. Her menarche3 R9 G; {9 i* M; m# l5 H t2 q
was at 11 years of age, and her height was at 5 feet
! R6 j9 |3 C- Q1 y' W5 inches. There was no other family history of pre-
/ T. T% N0 d- W( s, u* y# hcocious sexual development in the first-degree rela-
% e4 C. D% x# F6 Itives. There were no siblings.
) W* |( [; w- s& K9 ^% ?Physical Examination
3 d3 U/ Q8 j$ K7 dThe physical examination revealed a very active,+ g# s3 Y, |, I( P$ A6 _7 w
playful, and healthy boy. The vital signs documented! ^2 O8 |9 r& L0 O9 ~8 o
a blood pressure of 85/50 mm Hg, his length was
# g x7 F7 \. H$ E1 G7 X90 cm (>97th percentile), and his weight was 14.4 kg3 P v. r% S, j/ S. G; r
(also >97th percentile). The observed yearly growth
/ b( A- s3 T' W: wvelocity was 30 cm (12 inches). The examination of2 _% u9 x _' Z5 z7 V1 P5 Y
the neck revealed no thyroid enlargement.
+ y! R9 @ P6 u! g4 Y/ S$ u$ w$ OThe genitourinary examination was remarkable for( k, s# [# ^9 J0 ^$ V0 |/ n
enlargement of the penis, with a stretched length of
( R0 O% r, Z/ n8 ]' B8 cm and a width of 2 cm. The glans penis was very well4 F7 A+ R J7 P8 v% s- c
developed. The pubic hair was Tanner II, mostly around
7 E8 I. @9 F' s. G* e5400 w/ d0 ~' k2 C% D% d( J; d2 e, s
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
" S2 |8 S- r, T) o) Sthe base of the phallus and was dark and curled. The
% f2 E* h: P: O( Utesticular volume was prepubertal at 2 mL each.
1 k5 R% Q# |' q1 v% IThe skin was moist and smooth and somewhat
# ?5 z3 C: @% E4 v1 D& Yoily. No axillary hair was noted. There were no
8 j! m! K+ m( `7 f' _abnormal skin pigmentations or café-au-lait spots.
; q" m$ ~9 P9 U& s# g3 [Neurologic evaluation showed deep tendon reflex 2+0 C) L: S$ F5 w
bilateral and symmetrical. There was no suggestion
& s+ q9 _0 }( z# v% Aof papilledema.
0 ?) [9 Q; N' P# NLaboratory Evaluation6 _- v. E" H1 ^6 ?3 E1 F" \% c
The bone age was consistent with 28 months by
$ ?) h4 O* o9 `" ^3 busing the standard of Greulich and Pyle at a chrono-
) j6 q' y9 p8 v/ {0 ~logic age of 16 months (advanced).5 Chromosomal
, u; C" H& x8 ^$ S, s; @+ F' X4 N. gkaryotype was 46XY. The thyroid function test4 A4 t& `* @ w
showed a free T4 of 1.69 ng/dL, and thyroid stimu-$ f) [0 I- @7 ` @& o- @
lating hormone level was 1.3 µIU/mL (both normal).
+ O' [4 Q/ M1 J2 F1 M# c& r: A7 DThe concentrations of serum electrolytes, blood1 d& z+ v4 ?3 _
urea nitrogen, creatinine, and calcium all were
) B* p8 \, \- [9 G- Zwithin normal range for his age. The concentration7 A5 ]0 G- V8 N4 ?' P( d
of serum 17-hydroxyprogesterone was 16 ng/dL* i2 k" I2 D1 I+ U n( w
(normal, 3 to 90 ng/dL), androstenedione was 20$ C5 z4 a6 F/ s
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-2 a! m. O, m9 I, @' ], m" q9 A
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
! O1 v6 i2 F6 x! u8 c7 ydesoxycorticosterone was 4.3 ng/dL (normal, 7 to$ E. ~& y0 s+ ^% u& j% l. F
49ng/dL), 11-desoxycortisol (specific compound S)0 K2 m' ]1 s! {! i* T7 k. J
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
+ _! y5 ^7 c7 w6 _: ^( D% k# T0 ztisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total0 y6 L, E/ ]% g z% b
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),- Z) Z9 c/ A+ C
and β-human chorionic gonadotropin was less than
& m. P# e# s* Q* b5 mIU/mL (normal <5 mIU/mL). Serum follicular
: k) S( u$ ?0 c$ R7 D7 Astimulating hormone and leuteinizing hormone0 a; }0 X3 C/ Z. o# G
concentrations were less than 0.05 mIU/mL
& K& c, @/ V: e$ h) Y- E(prepubertal).
: P# ~/ q1 H- T1 Y5 h l; @The parents were notified about the laboratory f" S* K1 p7 U5 ?) Y- O k. w
results and were informed that all of the tests were
2 E) r, D7 H( ?- ]/ \7 Unormal except the testosterone level was high. The9 \. v: m, s+ A$ N$ }; u; ^
follow-up visit was arranged within a few weeks to
2 A3 }* [8 ~9 z" F, P5 x% a. E0 kobtain testicular and abdominal sonograms; how-
7 p+ ~& H( b9 i( Dever, the family did not return for 4 months.$ o( r4 S7 d3 Q5 R" r
Physical examination at this time revealed that the9 n+ E! ?+ I1 t. P$ e, s6 N5 E0 r9 ~
child had grown 2.5 cm in 4 months and had gained
# e& Y t- s) D5 q K6 n2 kg of weight. Physical examination remained6 Y1 F& `3 V& z) {
unchanged. Surprisingly, the pubic hair almost com-
P" c$ h) t9 I: jpletely disappeared except for a few vellous hairs at8 v2 G# A6 b1 X7 k2 n' [
the base of the phallus. Testicular volume was still 22 D7 b* D+ C% q4 ~
mL, and the size of the penis remained unchanged.
1 }0 ?% v3 F$ ]" NThe mother also said that the boy was no longer hav-; R$ T+ b# [/ {! J( M/ s; n& h K
ing frequent erections.
8 c$ Y! O/ P" V" p8 }Both parents were again questioned about use of" g; x( Z% k' N1 r ]) D9 @
any ointment/creams that they may have applied to; Q4 M! A0 R( ]1 j; c+ R# H) Y
the child’s skin. This time the father admitted the& o/ o' c* x M0 d) ~
Topical Testosterone Exposure / Bhowmick et al 541
* b2 P9 M% Z; E* {0 s F' \* v* muse of testosterone gel twice daily that he was apply-% {0 A0 z/ S; V0 h6 l. k# f
ing over his own shoulders, chest, and back area for
# E* ~% J' p5 K) sa year. The father also revealed he was embarrassed
: Y& K6 S+ K+ c0 G# G; nto disclose that he was using a testosterone gel pre-) W3 x- l7 @- J
scribed by his family physician for decreased libido, Y' q7 y/ g: r, U$ X
secondary to depression.' G' y4 j) ?2 H7 g+ Z2 p! M
The child slept in the same bed with parents.
) v8 \: J0 S% K* m1 ~+ YThe father would hug the baby and hold him on his# b$ h& Z' t4 {; T6 r/ h, Q. m# h
chest for a considerable period of time, causing sig-5 {; I# ]" k% J! Z; j
nificant bare skin contact between baby and father.
" x" x% u" b& q) G# OThe father also admitted that after the phone call,
7 K! ?6 r5 h) d" w; [" L+ C j+ xwhen he learned the testosterone level in the baby
9 J O% f' a8 xwas high, he then read the product information3 Z ]9 Q/ W8 g8 u* A" s6 K
packet and concluded that it was most likely the rea-
' Y' ?+ i7 B% R3 Y, {" A# Vson for the child’s virilization. At that time, they. C4 v) \( `5 S2 ~( h0 w; y
decided to put the baby in a separate bed, and the0 ~5 l' i4 C. U( L
father was not hugging him with bare skin and had2 Y: m# H& l5 N q" K( V+ K
been using protective clothing. A repeat testosterone
+ w/ d- c5 l6 \# M/ N' Etest was ordered, but the family did not go to the
* _9 L+ }! y. H8 [laboratory to obtain the test.
: Z) K5 X$ y$ Q9 `Discussion
; W6 q$ r% N. R9 _" GPrecocious puberty in boys is defined as secondary% o2 {- [# }' d
sexual development before 9 years of age.1,4
" H; m1 A( l+ F' h0 P% bPrecocious puberty is termed as central (true) when
% D* J: E4 X, h. D* x3 B( \it is caused by the premature activation of hypo-
`- J A! X8 hthalamic pituitary gonadal axis. CPP is more com-7 Z4 k s8 {3 i
mon in girls than in boys.1,3 Most boys with CPP6 b1 x5 ^' ^9 a5 }! j
may have a central nervous system lesion that is: `4 R' h% ]6 ?: J9 q+ z$ w) }* g
responsible for the early activation of the hypothal-# z; N+ l4 i" m2 z$ p
amic pituitary gonadal axis.1-3 Thus, greater empha-
T; T7 o s( M) l5 L) h0 ^# }sis has been given to neuroradiologic imaging in! t" @1 u% V- E$ M0 c( V) d
boys with precocious puberty. In addition to viril-3 j8 f2 H8 y* B" { z% B$ q& m
ization, the clinical hallmark of CPP is the symmet-
/ [1 S2 d+ c. ~; arical testicular growth secondary to stimulation by: Y% Q- R, ` |5 s p
gonadotropins.1,3
' t! V' a, O5 sGonadotropin-independent peripheral preco-- S \% W& {4 L% y* s; f0 M5 |
cious puberty in boys also results from inappropriate
& l3 B% C/ Y1 m9 O6 Z2 A; a- D& Wandrogenic stimulation from either endogenous or, F8 B& ]6 B) G4 y% `
exogenous sources, nonpituitary gonadotropin stim-
. K3 W& T# w% o; b! T' _( ~ulation, and rare activating mutations.3 Virilizing: o& Z+ F6 S3 i) H& G2 H2 R8 [
congenital adrenal hyperplasia producing excessive
: @" O P% }: o7 K6 c1 xadrenal androgens is a common cause of precocious
& S% {/ b, T u& z3 t! _0 Kpuberty in boys.3,45 k$ h5 }$ [9 s
The most common form of congenital adrenal- `( ]- a) G- r( w, K
hyperplasia is the 21-hydroxylase enzyme deficiency." ~, Z5 E- u) }' ~2 I m
The 11-β hydroxylase deficiency may also result in
! G4 {" ]3 f9 Texcessive adrenal androgen production, and rarely,2 q1 t$ l- W+ g: m3 O4 I/ I! v, [
an adrenal tumor may also cause adrenal androgen
4 y, B3 Q: ~/ u Wexcess.1,3" H% e: c0 n: q. W' V1 f
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' L( p3 k6 V F$ V) @! ` @
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007, z$ Z) Y0 M1 I
A unique entity of male-limited gonadotropin-
. x1 t( H: A, Gindependent precocious puberty, which is also known! i/ b% T8 j$ a9 @
as testotoxicosis, may cause precocious puberty at a+ K8 w0 Y, q+ h- W2 v+ n" ]9 C2 d' e
very young age. The physical findings in these boys. I/ Q. X5 b; o1 z0 n
with this disorder are full pubertal development,/ Q# L/ H" U B5 s5 d o
including bilateral testicular growth, similar to boys4 W# c0 ^* q" t- T
with CPP. The gonadotropin levels in this disorder
5 W N2 W- }+ K: g- W! e- k" o5 Eare suppressed to prepubertal levels and do not show0 E- P" D1 L# g. y
pubertal response of gonadotropin after gonadotropin-
3 h" c% M9 b6 }1 P: ]releasing hormone stimulation. This is a sex-linked) s1 S& o4 f1 l6 d; a0 p
autosomal dominant disorder that affects only
$ ^ S1 Y/ {. ?- }3 }+ ` wmales; therefore, other male members of the family
. a& B7 Z4 j- F! `6 f% umay have similar precocious puberty.3
4 C& L& G# T1 `" v8 `* M- jIn our patient, physical examination was incon-
K8 @: ^$ }' ] Usistent with true precocious puberty since his testi- Q6 X2 L' ~- n- n- y0 f+ x4 E+ u7 m
cles were prepubertal in size. However, testotoxicosis$ L* D# a' B1 T8 N4 d1 `9 F* t. |3 ]
was in the differential diagnosis because his father6 D$ m4 F6 M4 n6 j
started puberty somewhat early, and occasionally,
2 J4 d1 n5 K4 l+ s5 N- I- Htesticular enlargement is not that evident in the h$ S: u# Z" K" f- ^) z5 d
beginning of this process.1 In the absence of a neg-
: i: B: Z% b/ Tative initial history of androgen exposure, our
0 A, ]& z$ G4 @- J" X( ?& sbiggest concern was virilizing adrenal hyperplasia,
. n L: f6 j Oeither 21-hydroxylase deficiency or 11-β hydroxylase
9 W) M+ w1 n B1 ?5 m) L: gdeficiency. Those diagnoses were excluded by find-6 D+ D% J* W$ S! E: g# y1 O
ing the normal level of adrenal steroids.
?2 U" N% k7 O* v6 _4 lThe diagnosis of exogenous androgens was strongly
; ^3 K" N- A# E0 V9 N( w% Q* ]suspected in a follow-up visit after 4 months because
7 w- f! ~2 Q6 d- Pthe physical examination revealed the complete disap-, z7 p+ @0 Q6 G
pearance of pubic hair, normal growth velocity, and% `9 i9 b3 {3 l* k6 N; o
decreased erections. The father admitted using a testos-
4 I) m0 q, a" K3 Q9 y5 T) Q2 W4 _3 ]terone gel, which he concealed at first visit. He was
+ b! i, p* p [) [using it rather frequently, twice a day. The Physicians’8 t0 V& j+ v: n7 l7 ]/ q* ~6 e! d
Desk Reference, or package insert of this product, gel or3 {* g; F; B* I5 H/ X
cream, cautions about dermal testosterone transfer to( v* F# H% N" D% u1 [, V7 R( w4 u
unprotected females through direct skin exposure. Z+ E8 M# h$ d. J# g
Serum testosterone level was found to be 2 times the
4 @% V5 ]/ I! {+ M5 [baseline value in those females who were exposed to4 c8 A2 p- _ I, J% d z
even 15 minutes of direct skin contact with their male
; Z" ?+ d3 o+ ^# R1 d5 H2 Upartners.6 However, when a shirt covered the applica-
7 F1 K6 r4 _1 h! ption site, this testosterone transfer was prevented.
- H3 W1 x, ~1 k# o0 L j1 |Our patient’s testosterone level was 60 ng/mL,
( ~, ~! X0 q8 ?! X" N( W4 Xwhich was clearly high. Some studies suggest that" [& A1 B# n: \7 L
dermal conversion of testosterone to dihydrotestos-
t, ]* k7 N) rterone, which is a more potent metabolite, is more6 ^+ s" z6 x* G1 Q2 s
active in young children exposed to testosterone
. B$ h, c# d0 {$ e: y texogenously7; however, we did not measure a dihy-! Q4 X8 X" Z2 I. C* D
drotestosterone level in our patient. In addition to
2 @( ]# L' q7 J |" o* V& R# Wvirilization, exposure to exogenous testosterone in
0 v7 d0 a& A: B* ochildren results in an increase in growth velocity and- [) p# s+ v! q: ^2 h c4 t
advanced bone age, as seen in our patient.. K: Q# ~0 j4 d7 [8 X6 Z
The long-term effect of androgen exposure during( u8 i/ g5 z3 p o4 f3 Q* B9 `, @6 Z: R
early childhood on pubertal development and final( T. x! C" m, w' y" r
adult height are not fully known and always remain
+ F0 @$ @4 s* r) q3 ia concern. Children treated with short-term testos-
" g+ G) j! M0 @ r$ i3 Vterone injection or topical androgen may exhibit some! l5 V. O0 [3 v7 X% N2 p2 O
acceleration of the skeletal maturation; however, after% C4 _( b9 k! |- F3 T `
cessation of treatment, the rate of bone maturation7 U$ F0 D% {! g s- T
decelerates and gradually returns to normal.8,9* M4 X) D1 [, T% H! {
There are conflicting reports and controversy5 B% W' Q1 e0 f3 g, E0 f, U( O
over the effect of early androgen exposure on adult
z- w6 _$ Q9 dpenile length.10,11 Some reports suggest subnormal
7 T3 r+ t: Z: C5 }adult penile length, apparently because of downreg-
1 ?+ p1 |4 ?+ o% J4 u$ |ulation of androgen receptor number.10,12 However,$ o5 W; ?$ G. X' E6 c+ R3 T
Sutherland et al13 did not find a correlation between7 V" I- K/ G& A& l
childhood testosterone exposure and reduced adult! R( Q+ j: A0 ]$ `% k. o
penile length in clinical studies.6 L$ n2 y7 v7 ?9 p/ {0 ]
Nonetheless, we do not believe our patient is/ m8 V& B8 t' V- x" C
going to experience any of the untoward effects from
5 v4 ^7 V$ [2 t/ H) ]% _8 mtestosterone exposure as mentioned earlier because
( a( J5 v6 @5 A' Q) M' ithe exposure was not for a prolonged period of time.6 W5 H, h" U9 a* u9 B) A* I8 [5 v. T
Although the bone age was advanced at the time of
6 _+ l" C1 o& P7 r7 |3 odiagnosis, the child had a normal growth velocity at
: r( |7 V6 O& w; t5 V# ^/ Sthe follow-up visit. It is hoped that his final adult' u n% D: D. v2 f% G4 m, v
height will not be affected.
4 D7 t* j7 z" u% v, X' Q9 ~Although rarely reported, the widespread avail-0 K1 G% H' k8 |0 M; q2 X
ability of androgen products in our society may4 o5 i% }- W: ]
indeed cause more virilization in male or female
% Q, B2 b: ]6 C' S' ~ Z! fchildren than one would realize. Exposure to andro-8 ]! y5 w+ Q9 U6 `) j& ^
gen products must be considered and specific ques-
6 B! m# r5 g; ?/ X0 Xtioning about the use of a testosterone product or
0 B+ f1 m* B8 n5 V8 w2 zgel should be asked of the family members during5 t% ]5 N3 i/ r8 N, `1 g
the evaluation of any children who present with vir-$ b* }% U" n1 G0 X5 s m6 ^; [. S
ilization or peripheral precocious puberty. The diag-% L" }+ Y# K/ p& ]
nosis can be established by just a few tests and by
* U- s% f1 [. Y- d: K- wappropriate history. The inability to obtain such a8 g$ W, }- Q; F$ x5 C6 Z
history, or failure to ask the specific questions, may2 L0 O5 P" [# T* C8 ?
result in extensive, unnecessary, and expensive7 F: g" M P6 T2 g- N2 O: u
investigation. The primary care physician should be
2 R* H4 u% X/ R1 p! o1 V# e, ~' ^aware of this fact, because most of these children1 r+ a2 x: U7 B$ O
may initially present in their practice. The Physicians’
' O( O; U$ q$ JDesk Reference and package insert should also put a
" p6 X. i5 _( a) a, r3 |8 \; j& T& Hwarning about the virilizing effect on a male or
7 S) M4 v, n. }. U% O- _8 Y: \- X- ifemale child who might come in contact with some-
; a x$ j7 t* H# Y Y7 p: hone using any of these products.+ T& ~; [. o- l; Z; C8 e6 s& A
References/ `* B* ]( A4 m. T- K
1. Styne DM. The testes: disorder of sexual differentiation8 J$ A5 O& m0 [0 V* D
and puberty in the male. In: Sperling MA, ed. Pediatric: e5 H$ ]* E; u
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
) U2 @- s& e- C/ X" d2002: 565-628./ {! j* y$ M$ y) `5 H# o/ x
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious/ X# T( N3 S& S7 v0 h2 N( Q
puberty in children with tumours of the suprasellar pineal
4 S {- w# S/ Bat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
- w# W& p0 k0 H6 vTopical Testosterone Exposure / Bhowmick et al 543
* c! u6 }+ X, W' l3 q! h6 Eareas: organic central precocious puberty. Acta Paediatr.
- a; r0 Q3 S7 Q9 |4 ^2001;90:751-756.
2 S! l8 i/ a0 V" q7 l; ~3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.7 }6 }/ D1 ?+ @: o2 O' L- p
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
: Q8 M; S; T$ ~9 K! i; yDekker Inc; 2003:211-238.
6 \/ v% f3 H: s3 D8 j4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual& K6 |& ^& u% T0 h
development in a two-year-old boy induced by topical6 J" T5 F3 ~3 k* ^$ J" Q2 s& F8 F3 w6 R
exposure to testosterone. Pediatrics. 1999;104:e23.
% L/ l( ]+ e4 F d0 h5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
" v" \) v& y3 u: H/ vSkeletal Development of the Hand and Wrist. 2nd ed.- h* B6 ?) ^1 W
Stanford, CA: Stanford University Press; 1959.; g- O3 }3 f5 S( m
6. Physicians’ Desk Reference. Androgel 1% testosterone,
9 ~, k2 s; ~0 `5 E' kUnimed Pharmaceutical Inc. Montvale, NJ: Medical- z% R- D3 H, | X3 x* [
Economics Company, Inc; 2004:3239-3241.
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