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is a significant concern for physicians. Central4 t l7 N( l2 A0 ~
precocious puberty (CPP), which is mediated& V- }0 _4 W& Z& g ?( h
through the hypothalamic pituitary gonadal axis, has: ~8 w+ N" O2 Z2 C
a higher incidence of organic central nervous system
& T' G% |) A/ Q# Clesions in boys.1,2 Virilization in boys, as manifested; w' K$ N+ k" P
by enlargement of the penis, development of pubic4 e$ G# H- z4 V) c
hair, and facial acne without enlargement of testi-
$ Z, @2 F7 ~+ P% tcles, suggests peripheral or pseudopuberty.1-3 We2 o5 w3 h! c. N1 z
report a 16-month-old boy who presented with the
& b3 a/ |6 C+ n8 B+ c: T) Z' Oenlargement of the phallus and pubic hair develop-
E R" M. Z& a, xment without testicular enlargement, which was due$ q* c( {; L3 v' E) q
to the unintentional exposure to androgen gel used by
, r1 T7 d) n3 g1 ^the father. The family initially concealed this infor-
- W: }: q! W6 R0 ~/ Ymation, resulting in an extensive work-up for this
# m0 A8 B' D5 b) N/ Kchild. Given the widespread and easy availability of
2 n/ h/ F$ ]9 I0 H$ o! Qtestosterone gel and cream, we believe this is proba-( W. }6 q; ]$ c! p4 |
bly more common than the rare case report in the3 k3 g$ \, [1 e5 W2 Q# i4 |$ o M
literature.4( @! p2 f7 z1 e. Q3 C
Patient Report& X1 Q1 v$ j9 c7 Z* ~5 l: r' T
A 16-month-old white child was referred to the
1 Z! X9 `9 H. @% { sendocrine clinic by his pediatrician with the concern& ^* r8 h4 _5 e* ]; p
of early sexual development. His mother noticed
2 u% e+ J V p3 R" glight colored pubic hair development when he was
" D; q |* x2 S; i% j9 q7 CFrom the 1Division of Pediatric Endocrinology, 2University of" B4 K- \' }0 Z& r3 ~
South Alabama Medical Center, Mobile, Alabama.4 F# n: P+ V. \/ t
Address correspondence to: Samar K. Bhowmick, MD, FACE,
: i9 l9 n# D; t: M4 DProfessor of Pediatrics, University of South Alabama, College of
7 L% D6 m, h5 u9 i4 ~Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
& X6 K. e6 V" De-mail: [email protected].6 j1 v1 a$ Q0 ^$ k4 s1 ]9 s
about 6 to 7 months old, which progressively became
& M- r$ s$ k. ^3 z. e/ Ldarker. She was also concerned about the enlarge-! l2 i1 S# x0 H
ment of his penis and frequent erections. The child& I5 j9 T. \" s/ ?% Y
was the product of a full-term normal delivery, with4 R4 V0 S! F8 o( [" {4 G
a birth weight of 7 lb 14 oz, and birth length of
% }8 o+ ]1 c) q1 k' x% N" Q0 c20 inches. He was breast-fed throughout the first year
3 u# w9 r& c5 N: e4 i/ Mof life and was still receiving breast milk along with
; |! N5 M7 S$ L H6 K* d9 osolid food. He had no hospitalizations or surgery,
, s1 V8 m9 [, T0 E$ Vand his psychosocial and psychomotor development
% k9 m8 w1 {2 F6 ?! k% Mwas age appropriate. q# ]; }3 Q, z4 R9 E: Q% w' I9 w
The family history was remarkable for the father,- @1 X1 F& n8 U$ ^" C i; C
who was diagnosed with hypothyroidism at age 16,
/ L. O. U/ M- b' Bwhich was treated with thyroxine. The father’s! m8 ^" j1 U& @3 v2 E' B; {
height was 6 feet, and he went through a somewhat
8 p0 t& P f3 Uearly puberty and had stopped growing by age 14.
# G# a& t1 h, W7 a. TThe father denied taking any other medication. The2 V, ?+ g5 N1 U4 K% |
child’s mother was in good health. Her menarche
- f0 H! I. j2 u1 W, d/ a& S; z7 Awas at 11 years of age, and her height was at 5 feet
# X- y8 C; H. e5 inches. There was no other family history of pre-7 ]. k! c$ O: x; r2 t2 P
cocious sexual development in the first-degree rela-
4 N! i' P( @5 \8 e3 a+ s4 Mtives. There were no siblings.- @/ c9 E" B7 y, h1 w* h/ |, r
Physical Examination- A/ V! T! W, U L; `
The physical examination revealed a very active,/ B+ F6 R: }3 @+ l: e' s
playful, and healthy boy. The vital signs documented/ U; W: c- P/ k' Y+ a' y
a blood pressure of 85/50 mm Hg, his length was
2 s& ?: ?1 i: o' K# `. T2 b90 cm (>97th percentile), and his weight was 14.4 kg
6 ]' U' d! t! m4 r$ R1 M7 c- A9 g(also >97th percentile). The observed yearly growth
9 Z8 p2 O# K( vvelocity was 30 cm (12 inches). The examination of
: }% n& ?8 n1 ^8 E. A' @8 xthe neck revealed no thyroid enlargement.% N. S. C; u4 L2 U! {
The genitourinary examination was remarkable for; {: J( ^0 f' Y; `' `
enlargement of the penis, with a stretched length of
& q. B& ?! ~+ e( [0 z- Z8 cm and a width of 2 cm. The glans penis was very well
+ Z: N8 M# e7 v+ |1 T7 a2 vdeveloped. The pubic hair was Tanner II, mostly around7 R5 A$ O4 \+ B6 j& \
5409 ~+ H8 _7 f. |, `/ F8 |7 _( w0 R
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from! S9 _2 T s U
the base of the phallus and was dark and curled. The
3 m1 [, f& p: O. v, ^8 ktesticular volume was prepubertal at 2 mL each.
& J% a D9 |' `( |* d) j! g2 |The skin was moist and smooth and somewhat
1 L& L3 ~2 b& u. y. q# M9 noily. No axillary hair was noted. There were no
* f( w2 M$ @- z, uabnormal skin pigmentations or café-au-lait spots., N* x7 L* w! t* D" r
Neurologic evaluation showed deep tendon reflex 2+4 f8 @2 l3 L: P, Z& F5 N5 R0 K
bilateral and symmetrical. There was no suggestion
6 o t" s, a$ t7 S; h4 O! a& T* jof papilledema.% r6 g4 l1 b- R1 m0 \
Laboratory Evaluation& i, V$ H1 _% L, s3 I/ _0 Z
The bone age was consistent with 28 months by
) J/ ]. ]! p( kusing the standard of Greulich and Pyle at a chrono-
$ J; J, C' z b. x5 y& }* Glogic age of 16 months (advanced).5 Chromosomal
, m5 n; O: v5 L. D* ?, Wkaryotype was 46XY. The thyroid function test% \6 _1 Y5 v, b! p: Q, t
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
# t3 A. `8 S; l4 B$ m% q Ylating hormone level was 1.3 µIU/mL (both normal).3 N e' i: v0 U8 L& a3 ]
The concentrations of serum electrolytes, blood5 `8 Q6 J+ Q1 x/ J; S* m# W; s
urea nitrogen, creatinine, and calcium all were
" k- W6 v0 n7 N* W) ^within normal range for his age. The concentration* p( h" d2 K) L/ _7 r9 c( c
of serum 17-hydroxyprogesterone was 16 ng/dL2 c6 \+ c9 `: p, w
(normal, 3 to 90 ng/dL), androstenedione was 202 Z! n7 ^2 O& u" m
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-! Q' U- R+ K/ r9 ` M. ^
terone was 38 ng/dL (normal, 50 to 760 ng/dL),0 \: w1 Y/ m* I' c1 @
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
7 I) ]: f% |) Y5 q# X% s, M, s49ng/dL), 11-desoxycortisol (specific compound S)2 {0 U& `) o H: ~2 L2 z: i+ N
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
" y! Y4 Q: X$ s& l8 ^5 b+ C& Y1 D0 Htisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
) ?/ s1 G! P. D7 S. M7 d- ytestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
0 a5 y, `% a6 z8 q3 y: W: o2 \. q& C. N, }and β-human chorionic gonadotropin was less than( _5 u1 ?0 r/ ~9 Q$ b6 Q0 ]" v
5 mIU/mL (normal <5 mIU/mL). Serum follicular# d# B: v/ F5 b6 Q) S& g4 ?
stimulating hormone and leuteinizing hormone/ q% i# Q/ E0 I8 n' ~; Y
concentrations were less than 0.05 mIU/mL# _" a1 X5 ^$ [* @- Q+ Z
(prepubertal).
# w, x+ r5 y) n. b& p, E" c( vThe parents were notified about the laboratory
' p' U4 D8 a3 T( }8 N% K( Xresults and were informed that all of the tests were
) ^1 B& K- \- a& jnormal except the testosterone level was high. The2 a- E2 b5 w" S6 R) M+ s0 n1 g% |0 B
follow-up visit was arranged within a few weeks to
4 U H( ?* C# N U) o9 zobtain testicular and abdominal sonograms; how-
+ F) A3 W8 g9 G* U9 R: Dever, the family did not return for 4 months.+ r: L4 c6 }3 ^( Q( d
Physical examination at this time revealed that the
2 K6 u1 r- C5 W3 kchild had grown 2.5 cm in 4 months and had gained1 z* l, o v& P5 Y: Q
2 kg of weight. Physical examination remained& ^4 c( J5 d, s/ G9 \
unchanged. Surprisingly, the pubic hair almost com-
# w) }9 K w* S) [9 t, upletely disappeared except for a few vellous hairs at8 N9 a6 U4 C* s- j+ G3 E, y# s `6 v
the base of the phallus. Testicular volume was still 2
( Y' N% e( d$ t, F! nmL, and the size of the penis remained unchanged.) D8 v1 v! n. K% a5 ` j
The mother also said that the boy was no longer hav-' ]) O% I0 G# D: g& ?2 X3 S8 q
ing frequent erections.( W1 ?$ ]4 f7 ~
Both parents were again questioned about use of6 O8 e% H9 S+ X; J* }" q) ?
any ointment/creams that they may have applied to0 }* e* Z1 R" d" [( b3 m+ g; @ w
the child’s skin. This time the father admitted the+ S3 a3 p/ f/ `( ?
Topical Testosterone Exposure / Bhowmick et al 5412 b' y: K9 s. U: G
use of testosterone gel twice daily that he was apply-1 B& O$ W- x' y9 G6 _
ing over his own shoulders, chest, and back area for
, K3 q! }" l0 E: }a year. The father also revealed he was embarrassed8 M/ o: i+ L2 f) c& a) O4 s
to disclose that he was using a testosterone gel pre-! w% U. }: M: b: R
scribed by his family physician for decreased libido
: c2 p# ]% \ F6 V4 [secondary to depression.4 k! {2 O" c! D w1 o! L5 P2 j
The child slept in the same bed with parents. k( G# C4 o! |6 ^) ]$ D) |1 k3 A( m
The father would hug the baby and hold him on his
5 K$ r: [' F$ W% | S3 Dchest for a considerable period of time, causing sig- k6 Y) U( Z8 h. h/ o" `
nificant bare skin contact between baby and father.; v1 q( K5 H! O
The father also admitted that after the phone call,
! [2 q. \1 U+ d& x" P ?when he learned the testosterone level in the baby( s" S" l# K5 V3 j
was high, he then read the product information3 u3 {4 _" z5 a+ Q! x8 j
packet and concluded that it was most likely the rea-
3 F* @1 R2 Q/ \son for the child’s virilization. At that time, they
- P3 n. x: H- Z' j3 [: [decided to put the baby in a separate bed, and the
4 l9 _! w4 Z) o) ~* dfather was not hugging him with bare skin and had
& u% r9 M9 [2 H! A z2 Kbeen using protective clothing. A repeat testosterone
( R, w Y( ?8 A' Atest was ordered, but the family did not go to the7 }7 z2 k7 ?' q, k
laboratory to obtain the test.
( n: Q$ Z+ T; m2 ?8 jDiscussion
8 ?/ s, B3 f; XPrecocious puberty in boys is defined as secondary% d4 W3 r6 c4 u+ Y- C0 B/ j
sexual development before 9 years of age.1,4
( B' X! i* H I& e7 aPrecocious puberty is termed as central (true) when& V* q7 T! e% O# z: j( e
it is caused by the premature activation of hypo-7 L( I# k& e; O9 M G( y* ]
thalamic pituitary gonadal axis. CPP is more com-
) \/ `/ U! @* T( ~mon in girls than in boys.1,3 Most boys with CPP( k4 q+ y+ r' v8 f: v
may have a central nervous system lesion that is T8 W. r5 y, O1 E1 {: _
responsible for the early activation of the hypothal-
- s3 A E' P) F8 ?0 ?/ N5 ^amic pituitary gonadal axis.1-3 Thus, greater empha-
9 m4 f& B2 B/ P- E: B0 msis has been given to neuroradiologic imaging in
( _" @8 j3 P: B7 Jboys with precocious puberty. In addition to viril-1 C- [, p% b2 G6 d
ization, the clinical hallmark of CPP is the symmet-0 `$ l3 @, E# v, d& r
rical testicular growth secondary to stimulation by( y; i. k- i" [5 D$ G3 k3 i; z
gonadotropins.1,3
; \# c0 H2 u$ m+ t6 q }4 gGonadotropin-independent peripheral preco-
" v) r" d Y- W" V5 s N/ A" R! Rcious puberty in boys also results from inappropriate
) n9 L- q2 E9 m& @* candrogenic stimulation from either endogenous or
" [0 l7 e% K u! O ?exogenous sources, nonpituitary gonadotropin stim-
- @! T1 Y+ @3 T' O% Fulation, and rare activating mutations.3 Virilizing
b) T2 {+ ?& {7 Kcongenital adrenal hyperplasia producing excessive& G: } ^! e3 G% D7 u
adrenal androgens is a common cause of precocious& l$ d" p7 F1 Z) A8 h9 R1 X
puberty in boys.3,4' D. I' R. R2 q& V5 z( R
The most common form of congenital adrenal" n+ T! l" ^4 b5 C% Y( r2 b
hyperplasia is the 21-hydroxylase enzyme deficiency.
+ {: @+ @+ l' h$ ]/ I: N' a5 R6 u4 A3 IThe 11-β hydroxylase deficiency may also result in$ ]- R$ ?9 W' T3 E; s
excessive adrenal androgen production, and rarely," W x- L( ~3 \8 Z3 ^0 @ t
an adrenal tumor may also cause adrenal androgen
q0 X7 ]( L, d- N) M2 ]2 f4 D) l8 q0 wexcess.1,3
8 Z; h* ]( G% ^2 Q3 f3 l- L$ e& bat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
$ h: r8 W" u( H' U V1 a- C# d542 Clinical Pediatrics / Vol. 46, No. 6, July 2007; h' U! [6 r6 q* R5 s1 u+ |5 }1 ?, _
A unique entity of male-limited gonadotropin-$ z8 m6 k# U1 J# S& x
independent precocious puberty, which is also known
, ^% r& I4 C1 }* E) `( ras testotoxicosis, may cause precocious puberty at a
2 f8 K- c% `9 f6 D/ l9 h* G& A; Nvery young age. The physical findings in these boys1 ^0 K- ?$ j" [. u' g! ]0 F8 s
with this disorder are full pubertal development,
! u6 V$ E! x5 G* N) zincluding bilateral testicular growth, similar to boys+ R( Y; e4 z9 F5 y! g
with CPP. The gonadotropin levels in this disorder. w9 N: I9 M) @ a4 F x
are suppressed to prepubertal levels and do not show
/ X% i7 m/ l1 j' m1 _8 |4 P! {pubertal response of gonadotropin after gonadotropin-3 |" g" ]* R3 ?1 N& r: j2 Y
releasing hormone stimulation. This is a sex-linked
: s& I+ s& o( m+ v! @ a3 Q7 Fautosomal dominant disorder that affects only
1 V; T) s! r4 Y& w( lmales; therefore, other male members of the family
+ u7 w- u% k3 Q6 c8 Cmay have similar precocious puberty.3
. R! a8 u3 A, o9 ~8 W5 C9 ^0 GIn our patient, physical examination was incon-+ _+ s4 k- k/ ]5 W) I. s! t' c
sistent with true precocious puberty since his testi-
. u' M, V q. X5 t! U% K% U1 i1 bcles were prepubertal in size. However, testotoxicosis" F9 p. a7 q% P4 f f8 e+ C5 _# N
was in the differential diagnosis because his father
( O4 H0 l8 _5 X5 tstarted puberty somewhat early, and occasionally,. r5 g* I6 i. a& M
testicular enlargement is not that evident in the8 Z4 B x- i" D8 s
beginning of this process.1 In the absence of a neg-
$ \$ |( w( u4 S$ Z' G) M; o" ~9 A+ Oative initial history of androgen exposure, our' X) x o( t1 _2 }% Y" R5 z
biggest concern was virilizing adrenal hyperplasia,
1 J# o* u" v: \7 N7 ~either 21-hydroxylase deficiency or 11-β hydroxylase$ v7 I; y8 d# z8 ?/ ~( l" D
deficiency. Those diagnoses were excluded by find-
# J8 q& z3 _' P [- o0 N- Bing the normal level of adrenal steroids.* C6 @# a; f" |( T
The diagnosis of exogenous androgens was strongly
) j: h) c0 ^0 C, r; b5 Esuspected in a follow-up visit after 4 months because: r* p% ]7 y9 v, A5 L) G
the physical examination revealed the complete disap-
5 h" C6 ^; a2 f4 ^$ ypearance of pubic hair, normal growth velocity, and1 } g% j" M* J& }8 J5 E) a
decreased erections. The father admitted using a testos-$ D+ Z6 o0 J4 Y: P& G. I) R
terone gel, which he concealed at first visit. He was
! S+ @1 T( `! S: Susing it rather frequently, twice a day. The Physicians’% {! D' e# ? I+ i
Desk Reference, or package insert of this product, gel or/ u/ q1 z) @0 W/ _& x$ Z1 {
cream, cautions about dermal testosterone transfer to. [4 C2 g" Y1 O& i' N
unprotected females through direct skin exposure.' C- Z& Y% n5 }; `1 h
Serum testosterone level was found to be 2 times the
4 R4 m( P9 F3 Sbaseline value in those females who were exposed to# }6 g! {& n9 ]8 P# d/ ~; S
even 15 minutes of direct skin contact with their male0 Y4 Y! e( R- L
partners.6 However, when a shirt covered the applica-
+ g- N! D! |- p& ?8 n( X& M# L2 Stion site, this testosterone transfer was prevented.
3 l1 S% q1 I7 D1 W' [Our patient’s testosterone level was 60 ng/mL,7 I( Y- \" K$ R- ? K. b" U, r# Y
which was clearly high. Some studies suggest that( E# r" z, s4 p6 ?# \* s, D6 A
dermal conversion of testosterone to dihydrotestos-
7 U3 f9 k, b5 H1 T, E( Wterone, which is a more potent metabolite, is more$ M2 D6 }. s; q4 o% Y/ ?, q# U
active in young children exposed to testosterone
) V: F# f4 {7 B3 i6 E) b( R! u g5 pexogenously7; however, we did not measure a dihy-; |8 b3 q8 \! F& J
drotestosterone level in our patient. In addition to% D9 a1 t- R+ ^3 u D! e
virilization, exposure to exogenous testosterone in( A/ N. X' Z1 ~
children results in an increase in growth velocity and
' P* x4 V% d8 e5 Z) [( Y9 aadvanced bone age, as seen in our patient.3 L( M3 O9 I: \8 D8 ~
The long-term effect of androgen exposure during
. r& q& {& ^+ F7 }* Oearly childhood on pubertal development and final, q6 L/ _7 L5 c# L
adult height are not fully known and always remain8 z: L1 F5 K3 }3 a9 O: W
a concern. Children treated with short-term testos-
# F/ S& C/ J0 q4 T6 Vterone injection or topical androgen may exhibit some
$ {, P0 j8 N+ X5 u6 ?acceleration of the skeletal maturation; however, after1 w8 Z( C0 Q- f& j
cessation of treatment, the rate of bone maturation
) V/ ?: Q. t) l' ~0 ^decelerates and gradually returns to normal.8,9
% i6 A1 c! r8 \1 oThere are conflicting reports and controversy! W) ?/ L6 W/ y& p) y+ q& L- E
over the effect of early androgen exposure on adult9 @, f- y8 [; B( r* V/ E
penile length.10,11 Some reports suggest subnormal) a$ d# v: _* z! q
adult penile length, apparently because of downreg-, ~% k% I- F: a; A
ulation of androgen receptor number.10,12 However,
2 T; N& o1 k+ Z6 mSutherland et al13 did not find a correlation between' Q7 s% X- `: ], E8 @4 |7 Q+ [: ^
childhood testosterone exposure and reduced adult! @& m5 G; W5 x# E9 o4 i! n0 N1 F
penile length in clinical studies.
0 h- } v/ }6 M* INonetheless, we do not believe our patient is
2 u+ [! Z) k) @# e0 _, {, mgoing to experience any of the untoward effects from9 k$ G; E3 T/ b
testosterone exposure as mentioned earlier because
3 G$ f- J: L4 w& a% fthe exposure was not for a prolonged period of time.
8 N4 ?+ _5 g' W8 Y3 HAlthough the bone age was advanced at the time of$ ^7 L' G- F2 ^( Z
diagnosis, the child had a normal growth velocity at
. b$ x: y `* p# Y Pthe follow-up visit. It is hoped that his final adult4 k. O, f% I2 e' x/ u
height will not be affected.1 E0 ?5 m. V. Y v( R$ z( p
Although rarely reported, the widespread avail-
! b) L( b$ A* q; Wability of androgen products in our society may* t: X8 b7 ^, q1 b
indeed cause more virilization in male or female7 R3 e, B; J3 c U/ z6 \
children than one would realize. Exposure to andro-
# f/ G1 `2 @& T! ^. Ugen products must be considered and specific ques-
0 t; z1 I! m* d) h& ]' btioning about the use of a testosterone product or( q7 B, D7 x* U* V6 w
gel should be asked of the family members during
, A. ~# O4 e+ h! v0 qthe evaluation of any children who present with vir-
0 X1 L: @5 B# t0 ?( N7 d4 Oilization or peripheral precocious puberty. The diag-
0 g) @, o6 }# e) Unosis can be established by just a few tests and by* o( d+ T6 `0 m' K& I9 E! | ~
appropriate history. The inability to obtain such a
5 U( O5 ^7 i9 h- a) X% ^" chistory, or failure to ask the specific questions, may
9 u( x* k/ |$ Cresult in extensive, unnecessary, and expensive5 K3 X' ]- M" J" [/ h
investigation. The primary care physician should be
: P8 Z1 k: N8 A" K! P$ u2 r, c$ faware of this fact, because most of these children. i( a d- |/ h+ R; ]6 `5 R/ p
may initially present in their practice. The Physicians’
/ Q! g( d. _0 r8 R- X0 y1 K6 pDesk Reference and package insert should also put a
; G! K7 \( ?& `3 z0 A! Gwarning about the virilizing effect on a male or
% `5 i. ~/ \. Y, q/ afemale child who might come in contact with some-
6 \- e1 u, I aone using any of these products.
& P* v6 p# e2 i$ dReferences+ P3 |& ~4 p9 k
1. Styne DM. The testes: disorder of sexual differentiation6 \6 e/ |: T0 d4 Z
and puberty in the male. In: Sperling MA, ed. Pediatric
# V$ I3 u- l3 R0 `% sEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;4 ?. U, L. U$ ]! ?1 Y
2002: 565-628.7 s( A4 J& a( q S& _
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
M7 i7 Z8 P! Fpuberty in children with tumours of the suprasellar pineal5 O7 S: h/ W0 U' u
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from+ N' x2 _: k2 ?+ h9 R
Topical Testosterone Exposure / Bhowmick et al 543
+ k$ [# X. \. b( Z$ `( Nareas: organic central precocious puberty. Acta Paediatr.# E6 G( N9 o/ f8 L7 `, L
2001;90:751-756.3 g+ [. F. k" ~; v7 x1 R8 y9 x' y
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.& n# p q0 T1 y# _- }
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
; X: \2 @% q' iDekker Inc; 2003:211-238./ ~. K2 X8 h5 O
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual* ?! ^0 S8 k2 o1 d
development in a two-year-old boy induced by topical
6 z. v8 v4 Y% D* lexposure to testosterone. Pediatrics. 1999;104:e23.
7 z$ D X! h( f/ I6 P0 S9 ?7 S4 o5. Greulich WW, Pyle SI, eds. Radiographic Atlas of1 b4 S [# i! G" s# i
Skeletal Development of the Hand and Wrist. 2nd ed.6 h3 k/ [( H% @4 E/ G
Stanford, CA: Stanford University Press; 1959.' _& M& M0 j3 W
6. Physicians’ Desk Reference. Androgel 1% testosterone,# C; f7 W \. G5 P+ R; Z
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
5 _) D. K$ Z, l6 O8 [# y7 wEconomics Company, Inc; 2004:3239-3241., a+ [+ b3 i" k g& p
7. Klugo RC, Cerny JC. Response of micropenis to topical
) x7 l1 @* w! W# P. dtestosterone and gonadotropin. J Urol. 1978;119:( y8 v1 O9 u2 s \. _- ]
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