Neuroscience & Medicine, 2013, 4, 263-266
Published Online December 2013 (http://www.scirp.org/journal/nm)
Open Access NM
Polymicrogyria of the Unilateral Temporal Lobe in a
Transsexual Patient—Case Report
Ana Starcevic1, Dusica Markovic Zigic2, Branislav Filipovic1
1Institute of Anatomy “Niko Miljanic”, Faculty of Medicine, University of Belgrade, Belgrade, Serbia; 2Psychiatry Hospital, Clinical
Center Dedinje “Dr Dragisa Misovic”, Belgrade, Serbia.
Received April 19th, 2013; revised May 18th, 2013; accepted June 14th, 2013
Copyright © 2013 Ana Starcevic et al. This is an open access article distributed under the Creative Commons Attribution License,
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Introduction: Polymicrogyria, the appearance of irregular small and over numbered gyri on the surface of the brain,
has been reported as the most frequent finding, when exists, on the temporal lobe. Case Presentation: A patient, male,
age of 35, came to the regular head and brain MRI scan due to psychiatric and hormonal treatment within transsexu al-
ism. There were no data of epilepsy in a patient’s history. MRI scans were acquired with a 1.5 T Siemens Magnetom
system with a standard head coil. Three-dimensional 3D RAGE, contiguous 1.0 mm slice, and 1 acquisition sequence
underwent final 3D rendering and subsequent volumetry. On the definitive 3D image, we have rev ealed an unusual gy-
risation on the left temporal lobe which had a picture of partial polymicrogyria. Conclusion: This is a unique finding, to
our knowledge, of the unilateral temporal polymicrogyria in a person with transsexualism. Although polymicrogyria is
mostly related to epileptifom attacks, its impact on the transsexualism appearance is opened to be examined.
Keywords: Transsexualism; Polymicrogyria; MRI
Transsexuality is characterized by a strong conviction of
having been born in the wrong body and is also consid-
ered to be the extreme end of the spectrum of gender
identity disorders characterized by a pursuit of sex reas-
signment surgery . Transsexuals experience them-
selves as being of the opposite sex, despite having the
biological characteristics of one sex. There can be seen a
strong psychological rejection of the actual body. Fe-
male-to-male transsexuals and male-to-female transsexu-
als are characterized by persistent male or female identi-
fication and constant feeling of being trapped in the
wrong body, which is seems to be their permanent kind
of a obsessive thought and final life goal as gender iden-
tification is the basic human psychological characteris-
There might be many factors that can influence the
development of this disorder and it has been implicated
that genetic, hormonal and psychological factors are the
most dominant. There is also a fact that there must be a
morphological substrate like in every disorder that serves
like a base or material for development of the disorder.
Polymicrogyria is one of the most common malforma-
tions of cortical development. It is often associated with
specific syndromes, and has a wide variety of clinical
presentation [2-4]. It is considered to be a cortical mal-
formation development in which normal process of cor-
tical development is somehow stopped by different fac-
tors. Some of them are defined in the late stage of neu-
ronal migration or in the early stage of neuronal organi-
sation [4,5]. Polymicrogyria is a malformation with many
faces, so it is of major significance to have that in mind
when examing the MRI scans. It is mostly related to epi-
leptic attacks, and its impact on the transsexualism ap-
pearance is opened to be examined.
2. Case Presentation
Our patient is male to female transsexual, thirty five
years of age. He was reported to Counsiling Service for
Sexual and Gender Identity Disorder. During the inter-
view, he gave data on feeling different since childhood as
a female trapped in a male body. He mentioned he liked
to play more with h is girlfriends and felt like he is one of
them. It was at the age of four. His mother thought it was
Polymicrogyria of the Unilateral Temporal Lobe in a Transsexual Pa ti en t—Case Report
a transit stage of childhood.
The patient went through regular psychological and
neurological examination. His psychical and neurological
status showed no symptoms and no signs of epilepsy or
any other associated disease. He is left handed and has no
data of drug history. This is an unoperated patient, un-
treated by hormone therapy. He is currently undergoing
real life test under occasional psychiatric supervision and
support. He has two children from two marriages, eight
years old son and three months old daughter. The patient
is bacheleor in electric sciences, working two jobs which
are not in his field of professional interest.
There were some problems during his first marriage.
He had difficulties in expressing his true feeling. A
chance to express his true feeling was given in the pre-
sent marriage. Nevertheless, he is still submitted to occa-
sional psychological torture by his ex wife who consi-
ders him as a monster. On the other hand he found very
big support in his present wife who accepted his condi-
In the course of diagnostic and scientific evaluation,
MRI brain scan w as performed. During th e procedure an
unusual gyrisation of the left temporal lobe was revealed.
That was considered to be partial polymicrogyria.
MRI exams were performed on SIEMENS AVANTO
TIM 1.5 T (SIEMENS, Erlangen, Germany) using 3-
DFLAIR (TR/TI/TE = 6000/2200/300 ms) and MPRAGE
(TR/TE = 2000/5 ms) sequences.
Slice thickness in former case was 1 mm (no gap),
while in latter cases images with same thickness were
obtained with post-reconstruction from 1 mm sagittal
MR scans. After completion of examination, MR images
were transferred to personal computer and processed
using MIPAV software package (National Institute of
Health, Bethesda, USA). Separation of brain tissue from
surrounding structures on sagittal 3DFLAIR and
MPRAGE images and brain volume estimation was per-
formed using Brain extraction tool (BET). Rendering
procedure was used to generate 3D view of brain surface.
Estimation (i.e. segmentation) of gray and white matter
volumes was performed using fuzzy means algorithm
implemented in MIPAV.
We noted peculiar shape of the Sylvian fissure on the
polymicrogyric hemisphere with the absence of ascend-
ing branch (Figure 1). The posterior branch is inter-
rupted and terminates at the level of the preoccipital
notch (Figure 2). The cause of interruption is polymi-
crogyria in the parietotemporal region (Figure 3).
Brain segmentation showed difference in white matter
volume but not in grey volume. There were no differ-
ences in estimated brain volume.
Although public awareness is dramatically increased in
past few decades, our scientific understanding and ex-
planation of gender iden tity disorder is still very poor and
pretty limited. The factors can be different, but we can
determine on genetic, endocrine or hormonal or psycho-
There is an impressive data gathered predominantly
from laboratory animals, of the influence of gonadal
steroid hormones on the prenatal or perinatal sexual dif-
ferentiation of the brain. Studies in humans have shown
that levels of circulating sex steroids and estrogen feed-
back on luteinizing hormone do not differ between
transsexuals and controls [9-11]. Testicular hormones
also play very important ro le in the sexual differen tiation
Figure 1. Three different MRI aspect show specific region of parieto-temporal lobe with a peculiar shape of the Sylvian fis-
sure on the polymicrogyric hemisphere with the absence of ascending branch.
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Polymicrogyria of the Unilateral Temporal Lobe in a Transsexual Pa ti en t— Case Report 265
Figure 2. 3D FLAIR-parasagittal view of affected parieto-
temporal region; posterior branch is interrupted and ter-
minates at the level of the preoccipital notc h.
Figure 3. 3D FLAIR-axial view of affected parietotemporal
region; the cause of interruption is polymicrogyria in the
of the genitalia. Follow up studies of the patients with
clinical syndromes in which the hormonal environment
of the fetus has been atypical, have provided data on
possible effects of prenatal sex steroids on sexual orien-
tation and gender role stereotypes [12-14].
Behaviorists state that an infant’s mind is a blank slate
upon which social factors and conditioning act to pro-
duce all aspects of personality, including gender . This
belief takes the form of an axiom in their works and that
is a basic assumption not based in evidence but upon
which they derive results.
Sexual brain differentiation through embryonic devel-
opment deviates from the sexual differentiation of the
rest of the body  and that is why we state that neuro-
anatomy plays a critical role in determining gender iden-
tity and can help us in identifying underlying mecha-
nisms of transsexualism.
The human brain differentiates early in development
both structurally and functionally in a sexually dimorphic
way  which leads to the fact that transsexualism is a
sexual differentiation disorder of the sex dimorphic brain
. There are a number of different studies that exam-
ined brain structure and their correlate to this gender
identity disorder . Some of them are postmortem
studies, which revieled anatomical supstrates which are
sexually dimorphic like bed nucleus of stria terminalis
, INAH3  and number of neurons . There were
also data presented on brain assymetry and cortical cy-
toarchitectonics areas which were included in Fmri ex-
amination in transsexuals.
Resent advances in imaging have shown that po-
lymicrogyria have many apperiances on MRI imaging
which leads us to conclusion that is apperently more
various malformation than described before. It is often
associated with specific syndromes [19-22]. It is very
common seen in epilepsy. Our patient did not give us
data on epilepsy or any other clinical syndrome that can
ocure in transsexualism. Development of cerebral cortex
is so complex that it is no suprising that disruptions of
the processes of late cortical migration and cortical or-
ganisation at different stages might result in slightly dif-
ferent malformations and different clinical implications
and manifestations, even within transsexualism. The ap-
periance can be shown like small and very delicate gyri
or thick and irregulary, bumpy [4,23]. The cortex can also
have an apperiance of palisade. There are number of fac-
tors that can tribute to this cond ition, bu t we take stage of
maturity or myelination of the brain like one of the most
affective because the degree of myelination affects the
apperance. In unmyelinated regions the inner surface of
the polymicrogyric cortex looks thin and pretty bumpy,
while in myleinated areas it looks thicker and smoother.
Polymicrogyria is a malformation with many faces so it
is of major significance to have that in mind when ex-
aming the MRI scans.
All mentioned genetic, hormonal and psychosocial
factors cannot influence independetly, but yes predomi-
nantly by each in specific conditions. United influence
can tribute to the development of transsexualism.
The exact underlying mechanisms and determinants
remain to be established in future work, where interplay
between genetic determination, hormonal exposure, and
environment is very likely.
This is a first case, to our knowladge, which dealt with
polymicrogyria, and which was revealed in a transsexual
patient. There is no other brain abnormality or disfunc-
tion obtained in this patient. Although there is no evi-
dence of the polymicrogyria to influence the appearance
of transsexuality, further investigations ought to lead to
the detection of possible brain abnormalities of any kind
of MRI scans of the transsexuals.
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