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is a significant concern for physicians. Central4 f4 l, @: d$ ?# E- j, `# P
precocious puberty (CPP), which is mediated t( [* E8 _3 _" P; k& y* v+ s; j# W
through the hypothalamic pituitary gonadal axis, has
7 z+ i5 D8 d2 ]5 }a higher incidence of organic central nervous system: L/ r% V2 k" Z# P M& x: d5 E
lesions in boys.1,2 Virilization in boys, as manifested
) y5 [5 a6 u$ T1 tby enlargement of the penis, development of pubic2 O. u* Z. v: r/ W% |- K4 q
hair, and facial acne without enlargement of testi-: P' d0 E8 _" j
cles, suggests peripheral or pseudopuberty.1-3 We
' H4 d* o+ P& r7 |report a 16-month-old boy who presented with the9 P! ?6 ~# S) Y0 K8 ?4 E
enlargement of the phallus and pubic hair develop-
) [5 H7 I& c7 q% |6 p" @ment without testicular enlargement, which was due9 s# W% n' k- q' q
to the unintentional exposure to androgen gel used by
7 e/ {4 {$ Y0 Y6 ?# `) i4 ]the father. The family initially concealed this infor-
; Z5 ?" i' D6 tmation, resulting in an extensive work-up for this
! l/ y' J$ N: ~- bchild. Given the widespread and easy availability of3 e6 w" v( a( q3 h n
testosterone gel and cream, we believe this is proba-
: P6 E+ C7 C/ N5 _ wbly more common than the rare case report in the
) C' O: V' }' O; S) P4 _- `literature.4
1 C$ i- W) p! C# UPatient Report8 ~- D5 |! ^8 v i$ S0 Y* @& `
A 16-month-old white child was referred to the- L8 e4 c0 v* R( l4 i
endocrine clinic by his pediatrician with the concern- H* k* W, J' P6 D9 m
of early sexual development. His mother noticed" A" s$ { B- a
light colored pubic hair development when he was
' E+ ` i7 \: V: cFrom the 1Division of Pediatric Endocrinology, 2University of$ y" d- }; p Z- I% ~& [, n
South Alabama Medical Center, Mobile, Alabama.
' e0 f- \) E' V8 jAddress correspondence to: Samar K. Bhowmick, MD, FACE,
) r) _9 N# w6 W0 a2 @, pProfessor of Pediatrics, University of South Alabama, College of5 q/ L/ i( z' K D
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
3 R4 v+ p. Z& g. L1 Ie-mail: [email protected].
$ R, m* L; p& f7 L* |+ pabout 6 to 7 months old, which progressively became2 [6 h3 ?. ]5 H6 J. F+ x8 d
darker. She was also concerned about the enlarge-* S. _) W- \ m3 h- J+ H, Q
ment of his penis and frequent erections. The child8 Y" q7 S6 V" v8 U/ b, b
was the product of a full-term normal delivery, with
) s4 S+ V+ N% A2 e; ma birth weight of 7 lb 14 oz, and birth length of/ m" u5 j4 R: B# k' W0 m" e& G
20 inches. He was breast-fed throughout the first year I$ z/ q# u/ H' U8 @
of life and was still receiving breast milk along with
( ?& n! z) e- i/ f# P" S( h, e7 }solid food. He had no hospitalizations or surgery,7 K: U+ Q* Y6 r3 p6 C% p
and his psychosocial and psychomotor development
7 s+ S1 Z3 }5 A- U8 V R! k- dwas age appropriate.- z4 O, R7 f' |
The family history was remarkable for the father,
4 P9 } s$ n7 Swho was diagnosed with hypothyroidism at age 16,
( T# z4 t7 s0 }! {" T# Fwhich was treated with thyroxine. The father’s: S: H [( z5 ]3 q& F. {
height was 6 feet, and he went through a somewhat
4 _2 B; L& U2 m Q0 k( A* U8 R0 P8 Uearly puberty and had stopped growing by age 14.
n6 h' g2 D9 l. k( G( SThe father denied taking any other medication. The
" _! v- k) f9 g7 k+ R- g# ~# ]6 T7 uchild’s mother was in good health. Her menarche$ o; k7 q# m) E! b
was at 11 years of age, and her height was at 5 feet
. Y* A0 u0 p( g1 M! c7 J! Q2 C' W5 j5 inches. There was no other family history of pre-% ?6 x( t7 [! k; }$ S, J& {
cocious sexual development in the first-degree rela-
+ z: j ?& n' M- i) s6 Wtives. There were no siblings.
, M& _2 P. B) N9 Z$ B* tPhysical Examination
6 f! m2 [5 @- f4 N& }: G3 lThe physical examination revealed a very active,
+ m& y" t3 l9 O/ ~5 l0 J) Fplayful, and healthy boy. The vital signs documented+ k& H* E. V* \3 j
a blood pressure of 85/50 mm Hg, his length was. U& E3 z. [9 h( L% [; }
90 cm (>97th percentile), and his weight was 14.4 kg
& f9 z) P/ Z! M' E3 R6 D" I(also >97th percentile). The observed yearly growth: a$ D, S7 a0 M3 [
velocity was 30 cm (12 inches). The examination of
% [( ?: k# x7 E+ C3 ^/ h2 Ethe neck revealed no thyroid enlargement.+ t. ^6 ^$ J$ N2 U% Z1 r( b
The genitourinary examination was remarkable for. X3 A9 v: o6 C
enlargement of the penis, with a stretched length of" k. h* a, A# B. {
8 cm and a width of 2 cm. The glans penis was very well) D2 v) L- r C3 ]+ Y
developed. The pubic hair was Tanner II, mostly around
, G: [; i% h% w+ \5 E7 m& Z540$ h" Y# p& H& q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
+ x$ Q) X: R8 {1 Gthe base of the phallus and was dark and curled. The
+ s! r, t& m8 x0 m' B( d# Ktesticular volume was prepubertal at 2 mL each. R8 k+ ]* b% M
The skin was moist and smooth and somewhat. C0 l8 z; o2 g, o( c3 ~1 ~/ y
oily. No axillary hair was noted. There were no3 [2 h: X9 c5 k, i3 o; x; u
abnormal skin pigmentations or café-au-lait spots.3 X2 F5 M. S/ M9 S
Neurologic evaluation showed deep tendon reflex 2+) m' T. d+ w" `$ b& h; F; R y b% U
bilateral and symmetrical. There was no suggestion
4 A" s) W* s# r) k& D* F, \# C! Bof papilledema.
B4 R2 \; i/ f' Z: A) J, ^: q% B) XLaboratory Evaluation
7 v- j2 E, a2 S. S$ qThe bone age was consistent with 28 months by% X1 E; w$ K; {& \0 B9 p/ M# ^
using the standard of Greulich and Pyle at a chrono-
8 W. J/ i( X y9 flogic age of 16 months (advanced).5 Chromosomal* t! N1 g/ m; Y8 Y. H* y! u
karyotype was 46XY. The thyroid function test
' J) ]3 Y" O. cshowed a free T4 of 1.69 ng/dL, and thyroid stimu-9 H8 g+ A% U) `1 y9 X4 k. Z1 P
lating hormone level was 1.3 µIU/mL (both normal).) y& a; o( y6 h+ \0 H
The concentrations of serum electrolytes, blood
4 i4 V( @4 Y" V& k" W; Durea nitrogen, creatinine, and calcium all were
+ J9 ~. N0 X+ J. V2 A$ Mwithin normal range for his age. The concentration# S( B* C/ C( n7 C& R- \( v
of serum 17-hydroxyprogesterone was 16 ng/dL
& ~, c( ~$ @, q6 T7 c( a, [5 g(normal, 3 to 90 ng/dL), androstenedione was 209 G/ Q3 A) {/ i0 k9 ?
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
- J( C6 U+ d) m8 k, H5 Iterone was 38 ng/dL (normal, 50 to 760 ng/dL),/ ]" Y& S+ G9 G6 J+ l5 y: I% J
desoxycorticosterone was 4.3 ng/dL (normal, 7 to$ L8 m0 Y3 E( O$ S4 A) Y
49ng/dL), 11-desoxycortisol (specific compound S)/ c0 Y+ p3 Z1 l, T- J# |! k! b
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-4 p$ e( I+ v; A( f9 T
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
+ D& M! @# s- T5 r- P& U7 etestosterone was 60 ng/dL (normal <3 to 10 ng/dL),2 A2 ?) L6 E+ T4 ?1 D6 X
and β-human chorionic gonadotropin was less than% K7 L1 {3 {7 g4 |
5 mIU/mL (normal <5 mIU/mL). Serum follicular" _2 t5 d. }/ ~6 L% r
stimulating hormone and leuteinizing hormone; w! D3 v$ a' x. H
concentrations were less than 0.05 mIU/mL# K1 e' Z7 Z: z/ v; D N$ ?* y+ K
(prepubertal).
+ _! C! X9 g4 c+ A. ]9 b" R# ZThe parents were notified about the laboratory( E. L/ u2 K- { c0 U2 U
results and were informed that all of the tests were7 g$ m* G9 {1 K) C
normal except the testosterone level was high. The
& C" W6 r, H) K [follow-up visit was arranged within a few weeks to3 ~. e% J, ~: O2 ?1 a" G
obtain testicular and abdominal sonograms; how-
1 ~6 _+ Q/ [6 l7 eever, the family did not return for 4 months., |3 i* {/ e) k9 K
Physical examination at this time revealed that the W& B8 z! K/ ^! ?0 O& T8 Q; F4 i
child had grown 2.5 cm in 4 months and had gained+ n j0 Q! q/ Y: i$ a
2 kg of weight. Physical examination remained1 }5 p8 k" [4 h9 D- p" T
unchanged. Surprisingly, the pubic hair almost com-
# {+ F3 a* ]$ ~! Xpletely disappeared except for a few vellous hairs at M n7 B8 x2 `" i$ T% z1 Y2 g
the base of the phallus. Testicular volume was still 2
3 R2 s$ j9 M' g% i5 Y# _$ C. f$ JmL, and the size of the penis remained unchanged.
& K: p9 g3 a2 B$ ?The mother also said that the boy was no longer hav-
7 `$ i/ F! L$ t9 {7 Xing frequent erections.
+ Q* m" G4 e0 f4 J! z% o. V5 Y2 D6 MBoth parents were again questioned about use of( Z/ n M* s: Q3 J/ y
any ointment/creams that they may have applied to# K o# ]4 @) C9 k3 ?
the child’s skin. This time the father admitted the
r8 @0 l4 k7 }- [- RTopical Testosterone Exposure / Bhowmick et al 541
# P( J- c2 Z- c0 Uuse of testosterone gel twice daily that he was apply-
2 O% A0 b* ]7 p- C2 {3 m8 I; a6 Ning over his own shoulders, chest, and back area for
7 m8 ^# C M( K; ^a year. The father also revealed he was embarrassed; b# M, x. a+ G
to disclose that he was using a testosterone gel pre-- ~ I- c* J9 Y- x3 e- ]& d
scribed by his family physician for decreased libido
1 o! S1 P L1 c0 j2 a! ]secondary to depression.
7 C2 {& a8 R8 W7 `+ v- {The child slept in the same bed with parents.3 A- ~' g; h8 ]# G0 a7 F
The father would hug the baby and hold him on his2 b! l; S( t4 a) h1 f9 P% y
chest for a considerable period of time, causing sig-0 j6 p- E7 X( Q0 }
nificant bare skin contact between baby and father.4 n, Z7 \+ G Q" I
The father also admitted that after the phone call,: Y/ p! e# @0 t* y: N
when he learned the testosterone level in the baby L' P* Y" h: X$ F
was high, he then read the product information' P8 q1 _9 [7 q! q* r
packet and concluded that it was most likely the rea-
7 {6 X( U6 ]' u+ r( ison for the child’s virilization. At that time, they
; z" {& Q0 h* `( C, m9 Odecided to put the baby in a separate bed, and the# N8 f6 Q# U1 a4 p7 p5 a/ F
father was not hugging him with bare skin and had
' ]& y5 S/ w4 F% C2 g% Abeen using protective clothing. A repeat testosterone5 \) M0 M, Q8 w
test was ordered, but the family did not go to the, E$ R- S8 `3 i" k( j C
laboratory to obtain the test.
9 S$ T8 ]1 n5 `! }- g SDiscussion& s. k! l1 V: ^$ Z. F6 @
Precocious puberty in boys is defined as secondary2 G% {, O8 n0 C# @
sexual development before 9 years of age.1,4# \5 g" M1 y9 @) F( V! r" c
Precocious puberty is termed as central (true) when
" T3 K+ T5 v# j+ Git is caused by the premature activation of hypo-, _4 N& X6 n) G, y, H
thalamic pituitary gonadal axis. CPP is more com-4 w6 b4 U$ Q2 M9 N
mon in girls than in boys.1,3 Most boys with CPP8 T, F: R* L& D8 o/ Q5 \; b8 p+ J4 I
may have a central nervous system lesion that is
; e' D/ L, i- C4 ?. rresponsible for the early activation of the hypothal-$ i5 T' o# ~% w8 l. t$ C
amic pituitary gonadal axis.1-3 Thus, greater empha-
- o8 ?* G# u" s/ A! |. t2 \& V! vsis has been given to neuroradiologic imaging in
6 O$ I: f+ L$ l! Vboys with precocious puberty. In addition to viril-& T6 P5 U( F# V8 \
ization, the clinical hallmark of CPP is the symmet-% `) G8 |6 N2 g1 y4 g2 O
rical testicular growth secondary to stimulation by. P! {3 Z! s% h
gonadotropins.1,3: R! p& k" J5 O' I
Gonadotropin-independent peripheral preco-, }- Z) h4 o- V* @0 J
cious puberty in boys also results from inappropriate1 {& Y; x+ o+ H/ K) ~7 V% A
androgenic stimulation from either endogenous or. o6 @" m1 z, I# A& Y+ H8 ~5 B, _
exogenous sources, nonpituitary gonadotropin stim-
: L9 U* w, s. s% \" julation, and rare activating mutations.3 Virilizing7 M6 f' A$ ]% ?/ l9 F* y
congenital adrenal hyperplasia producing excessive# n* C; I7 ? O6 E2 X$ Z
adrenal androgens is a common cause of precocious; H) }# ^! }$ q& `
puberty in boys.3,4! o& q8 X. L0 d/ {! I3 {- S
The most common form of congenital adrenal1 w u! [4 X% @5 o6 o
hyperplasia is the 21-hydroxylase enzyme deficiency.& H( i+ n2 D. Z2 U4 {: F6 Q3 j
The 11-β hydroxylase deficiency may also result in% r5 a( R: c/ C
excessive adrenal androgen production, and rarely,$ x0 q4 O, L$ V/ Y3 e
an adrenal tumor may also cause adrenal androgen! Y3 i3 w [6 U; [( n
excess.1,39 b# ^3 W6 L2 ]( {1 P. G0 U
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from, q, Q; K C& ]# R; C4 P: t
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007! Q+ a! S- a' U" w
A unique entity of male-limited gonadotropin-
; ^. T2 J8 }# f4 ^independent precocious puberty, which is also known
$ T) {( L+ c# v' E1 H0 vas testotoxicosis, may cause precocious puberty at a
1 j! G5 H' n9 |0 ?0 P/ r. Cvery young age. The physical findings in these boys
0 u# V/ D5 y1 L7 Ewith this disorder are full pubertal development,/ }" D8 f2 E; U" h
including bilateral testicular growth, similar to boys
$ E. m' Q; H" G. I/ r% D: P( [with CPP. The gonadotropin levels in this disorder! ^& ^2 c2 ~6 O9 ]
are suppressed to prepubertal levels and do not show1 j/ W; p6 A4 Y& u3 _
pubertal response of gonadotropin after gonadotropin-
5 u2 U! n) o0 ?; k, _releasing hormone stimulation. This is a sex-linked
5 L4 [. K4 G5 `: s+ H3 gautosomal dominant disorder that affects only
% m( {3 p, a+ \0 w4 ^males; therefore, other male members of the family# ^( c" L! s9 \, B
may have similar precocious puberty.34 ~' `& ^9 P5 x! i& W) G# B9 ^
In our patient, physical examination was incon-- S; W1 o9 x# z" k
sistent with true precocious puberty since his testi-; p0 g1 C1 Q- c( X
cles were prepubertal in size. However, testotoxicosis
/ \2 ]: M! v" O$ M. L* uwas in the differential diagnosis because his father( l8 S6 s9 `3 w6 @7 H1 }0 j" F S1 B
started puberty somewhat early, and occasionally,
, h P4 R' ]1 m9 `testicular enlargement is not that evident in the
( c* n8 N: M) b* R- b7 B" hbeginning of this process.1 In the absence of a neg-# U9 r/ p. W- M( l N, ^& [
ative initial history of androgen exposure, our
' L. m1 W- V, S% v' n' t% cbiggest concern was virilizing adrenal hyperplasia,( w& k! {& v7 H
either 21-hydroxylase deficiency or 11-β hydroxylase
4 |# ~7 v% E% Q# I3 M, Ideficiency. Those diagnoses were excluded by find-" T- K3 f( Y y1 S. I J
ing the normal level of adrenal steroids.4 i2 q; Z/ G; s l
The diagnosis of exogenous androgens was strongly
$ H& f% F: t( G$ \; Asuspected in a follow-up visit after 4 months because
2 p, Z1 ]' l2 Q" F' e% N" |the physical examination revealed the complete disap-* B: P2 C( ^( Y% l# S
pearance of pubic hair, normal growth velocity, and
: { j z' c& F$ k2 ?8 Y0 _+ Sdecreased erections. The father admitted using a testos-' V/ O+ L: q q# D! v
terone gel, which he concealed at first visit. He was- Y7 a4 Z0 _ n* k- _
using it rather frequently, twice a day. The Physicians’
8 k+ U7 }7 M" i: L6 a3 eDesk Reference, or package insert of this product, gel or0 \) y1 W1 g" p% e/ E5 K' C
cream, cautions about dermal testosterone transfer to+ b9 N2 j }) L7 S
unprotected females through direct skin exposure.* q5 m5 `0 N9 [2 \8 s* Y* b
Serum testosterone level was found to be 2 times the3 z, W: |- y) f7 ]# t6 x
baseline value in those females who were exposed to9 g9 z9 o9 d% Z, E5 N" F. q5 |% h
even 15 minutes of direct skin contact with their male
+ @% g" p$ M4 M8 U5 T3 s, ^. e6 Bpartners.6 However, when a shirt covered the applica-
/ n7 o2 q' H6 M+ y6 K& V: Jtion site, this testosterone transfer was prevented.
/ `3 a9 t4 O, ^# E4 W2 w0 \1 tOur patient’s testosterone level was 60 ng/mL,. |$ `1 A: C Y* o/ b& o' b
which was clearly high. Some studies suggest that
0 g% Z& G& j& T6 [8 f8 E0 R1 kdermal conversion of testosterone to dihydrotestos-1 D4 Y- m- b/ p9 {, [
terone, which is a more potent metabolite, is more; e. s( O! {! A& X ?9 s" P& |
active in young children exposed to testosterone
" U8 o0 X/ w5 l& k* D) S. iexogenously7; however, we did not measure a dihy-5 @8 e( l; Z+ T
drotestosterone level in our patient. In addition to
3 K! o( Z/ @2 j+ Xvirilization, exposure to exogenous testosterone in
. S7 P( F0 F( z0 g ochildren results in an increase in growth velocity and
! V9 Q5 v1 F1 G1 Y8 S4 u) N2 nadvanced bone age, as seen in our patient., G6 B$ U+ a+ O5 `4 }5 Q
The long-term effect of androgen exposure during& g2 X0 B' Y& K8 J& x, k3 f) W
early childhood on pubertal development and final
9 b: C: g$ z1 ~/ r% x/ N( \, Badult height are not fully known and always remain7 l8 K7 e" m& i2 ~0 N `0 f
a concern. Children treated with short-term testos-
% Z5 q5 P: a$ Q' b% ~terone injection or topical androgen may exhibit some
$ D! u( x( j; z- r9 ^. Xacceleration of the skeletal maturation; however, after
" v$ p, [8 i; d: z7 g5 ocessation of treatment, the rate of bone maturation$ B0 Q! n, h0 M! L# N2 Y. g
decelerates and gradually returns to normal.8,9
! ^+ R3 w- _! |+ yThere are conflicting reports and controversy
5 k6 T( q' _6 i* x& m" c dover the effect of early androgen exposure on adult1 [+ Z2 A6 H" w6 R1 @
penile length.10,11 Some reports suggest subnormal4 \& i @" K! E( v. p& ^0 L
adult penile length, apparently because of downreg-
; ~5 r" L4 ]& Y8 Wulation of androgen receptor number.10,12 However,# O! E9 \" U/ j" V4 e8 ?; d' A
Sutherland et al13 did not find a correlation between8 Q' [% [1 ?) [; z
childhood testosterone exposure and reduced adult
) c' D" k# X4 \9 I) L: [6 Npenile length in clinical studies.1 H) S {) Q4 @! m
Nonetheless, we do not believe our patient is
4 L. ] j0 Q% x0 zgoing to experience any of the untoward effects from/ h( ^1 [8 ?% e6 L' ^2 S" }6 C
testosterone exposure as mentioned earlier because
$ B- Z; I! l# L' @the exposure was not for a prolonged period of time.1 O2 ?0 U- _0 E: o+ `+ b, I; t# F8 C
Although the bone age was advanced at the time of
0 R) O! o/ W3 h/ K4 ediagnosis, the child had a normal growth velocity at
" g* `+ f% W8 X6 R* O# O7 r: H% |the follow-up visit. It is hoped that his final adult
) m& z% \ A& H9 v, cheight will not be affected.
. i6 o, e$ b0 D+ L/ x$ F" ^; E% |8 DAlthough rarely reported, the widespread avail-
8 T1 z; D' D" pability of androgen products in our society may
( E0 N3 P6 s7 zindeed cause more virilization in male or female O) P" z* t! H L( \! S7 I) m
children than one would realize. Exposure to andro-- v" T8 }4 J7 p" C
gen products must be considered and specific ques-( ^' \2 M/ c0 S: X9 l
tioning about the use of a testosterone product or* u8 c( B( w8 q, T" ~4 e/ h
gel should be asked of the family members during
6 z' g& P, f9 N0 t% i8 jthe evaluation of any children who present with vir-5 g% Z2 q- \* H; J/ V( H- C1 v
ilization or peripheral precocious puberty. The diag-
: r" r8 n5 A3 i, S4 }- a: K* r2 Unosis can be established by just a few tests and by! a q- `5 F( {2 J0 I: n2 J
appropriate history. The inability to obtain such a, j7 o! X7 [& b8 T' o) e
history, or failure to ask the specific questions, may
/ s- ?% [5 m( w. V8 O6 ~. b" G' cresult in extensive, unnecessary, and expensive) d+ b6 [; O [9 O0 ]# ]
investigation. The primary care physician should be8 ?+ \; r' q' Y9 k1 _, q" s
aware of this fact, because most of these children3 L' @4 a7 k9 A D3 g
may initially present in their practice. The Physicians’1 @$ ^! C7 ?. V7 K
Desk Reference and package insert should also put a
, _/ D) Y) Q9 w3 w8 x) Cwarning about the virilizing effect on a male or
1 S9 [. _: I! S# Pfemale child who might come in contact with some-2 W- V0 M5 |, C* D# H
one using any of these products.
1 h+ ^7 X2 j$ _. p" Z4 c- zReferences) r" s1 n' X% D3 }8 {
1. Styne DM. The testes: disorder of sexual differentiation! R% p- q" L; j! X$ {
and puberty in the male. In: Sperling MA, ed. Pediatric
( r8 Q% l4 A2 n/ Q+ t: i Z: ]Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
, r b$ L0 c( Y$ Y# m, }5 X2002: 565-628.. t8 \- _, ^4 R" _: j
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
* [0 K% G1 G; m$ b8 Zpuberty in children with tumours of the suprasellar pineal; w8 m- Q4 [1 t
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
' H5 x B' {; rTopical Testosterone Exposure / Bhowmick et al 543
7 k6 @7 S9 g* o: bareas: organic central precocious puberty. Acta Paediatr.
6 P9 h. q7 z) h& T$ Y2 j2001;90:751-756.* O$ }1 K' _8 I5 F4 i
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
* g: f7 d7 ]& Z% v; wPediatric Endocrinology. 4th ed. New York, NY: Marcel+ @' U- g% T7 c/ Q& Z1 c
Dekker Inc; 2003:211-238. F' i" ?7 z) C
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual: p( T$ }% d' k3 t, U% w: R
development in a two-year-old boy induced by topical% n) A2 D4 }7 p1 v2 G) s [, ~
exposure to testosterone. Pediatrics. 1999;104:e23." h0 \" H3 [% k, q1 N& O/ }% G
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
. G+ I2 K* S) g6 wSkeletal Development of the Hand and Wrist. 2nd ed.5 [* B# j) j `& w
Stanford, CA: Stanford University Press; 1959.9 g) Y* z% ]: H& F2 \( l( K
6. Physicians’ Desk Reference. Androgel 1% testosterone,
3 j/ R4 e5 X- Q+ PUnimed Pharmaceutical Inc. Montvale, NJ: Medical
8 r! k" D+ A, k# W F2 cEconomics Company, Inc; 2004:3239-3241.
: S% n& d& S# y) A3 k' [2 ]7. Klugo RC, Cerny JC. Response of micropenis to topical3 z8 L# I8 K/ }( R/ ~9 ?1 I& \
testosterone and gonadotropin. J Urol. 1978;119:
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