Wednesday, 20 May 2020
Tuesday, 19 February 2019
Anatomy Revisited #1
Q. Which of the following is true of the anatomical position?
(A) The humerus
is proximal to the scapula.
(B) The radius
is medial to the ulna.
(C) The
vertebral arch is ventral to the vertebral body.
(D) The femur is
superior to the fi bula.
(E) The phalanges of
the foot are cranial to the metatarsals
Ans: The answer is D:
The femur is
superior to the fibula. In theanatomical position, a person
is standing erect, facing anterior(forward), with the upper limbs by the sides,
the palms facing anterior, the lower limbs placed together with the soles on
the ground, and the toes pointing anterior. In this position, the thigh is
superior to (above) the lower leg. Thus, the femur is superior to both the
tibia and fi bula. Choice A (The humerus is proximal to the scapula) is
incorrect. The humerus hangs from the lateral corner of the scapula; thus, it
is lateral and inferior to the scapula. The humerus also may be described as
distal to the scapula because it is further away from the attachment of the
upper limb to the trunk. Choice B (Theradius is medial
to the ulna) is incorrect. The radius is the bone in the forearm located
further away from the midline. Therefore, the
radius is located lateral to the ulna. Choice C (The vertebral arch is
ventral to the vertebral body) is incorrect.
The vertebral
arch, which is composed of the paired pedicles and laminae, is located dorsal
(posterior; behind) to the body of the vertebra. Choice E (The phalanges
of the foot are cranial to the metatarsals) is incorrect. The phalanges (toes)
are positioned anterior to (or in front of) the metatarsals, which are located
in the body of the foot. The phalanges also can be
described as being distal to the metatarsals in that they are further away from
the attachment/origin of the foot.
Q. A radiologist wishes to image the body in a plane parallel to both
scapulae. Which of the following choices best describes the desired sectioning?
(A) Horizontal
section
(B) Transverse
section
(C) Frontal
section
(D) Sagittal
section
(E) Oblique section
The answer is C: Frontal section.
The scapulae
(shoulder blades) lie across the back. An imaging plane passing parallel
to both these
bones divides the body into anterior (front) and posterior (back) parts. A frontal
(coronal) section divides the body into anterior (front) and posterior (back)
portions.
It runs
perpendicular to the median and horizontal planes. Choice A (Horizontal
section) is incorrect. A horizontal section passes at right angles to both the
median and coronal planes, dividing
the body into superior (upper) and inferior (lower) parts. Choice B (Transverse
section) is incorrect. A transverse section (cross section) passes
perpendicular to the long axis of
a structure. While often the same as a horizontal section, it is not always
equivalent. For example, a transverse section through the foot is equivalent to
a coronal (frontal) section, dividing the foot into anterior and posterior parts.
However, a horizontal section of the foot divides it into superior and inferior
parts, as shown in the given illustration. Choice D (Sagittal section)
is incorrect. A sagittal section runs parallel to the median plane of the body,
dividing it into unequal right and left parts. Choice E (Oblique
section) is incorrect. Oblique sections run at offset angles from the median,
coronal, and horizontal
planes. Horizontal sections of the abdomen produce mostly oblique (not
transverse) sections of the small intestine because of the coiled nature of the
bowel.
Q.Screwing in movement of forearm is?
(A) Flexion
(B) Abduction
(C) Pronation
(D) Adduction
(E) Supination
The answer is E:
Supination.
The screw-home
movement is the clockwise motion that drives a screw into its receptacle,
in this case the
bulb into the socket. When using the right hand, the palm and forearm turn
laterally and the palm moves from facing posterior to facing anterior, which is
supination. Choice A (Flexion)
is incorrect. Flexion is the action of decreasing the angle between parts while
moving through the median or sagittal planes. Choice B (Abduction) is incorrect. Abduction refers
to movements going away from the midline in the coronal plane. Choice C (Pronation)
is incorrect. Pronation is the opposite of supination. When pronating the right hand, the palm
and forearm turn medially so that the palm moves from facing anterior to facing
posterior. In this case, right-handed pronation is a counter-clockwise movement that would
unscrew the light bulb. However, when using the left hand, pronation produces
the screw-home movement. Choice D (Adduction) is incorrect. Adduction
refers to movements going toward the midline in the coronal plane.
Source: lipincotts illustrated anatomy and embryology
Thursday, 17 May 2018
MIXED
MIXED
Q. What is the most effective screening technique for cervical cancer?
a. Fourier transform infrared
b. PCR assay
c. HPV DNA testing
d. Pap smear
Ans: d. The most effective screening technique remains the Papanicolaou test ("Pap
smear").Fourier transform infrared (FTIR) spectroscopy is a new tool for screening
cervical cancer and has a sensitivity of85% and a specificity of91 %. PCR DNA
techniques can be used to help detect concomitant HPV infection.
Q. Which of the following is a risk factor for breast cancer?
a. fibrocystic disease
b. first-degree relative with breast cancer
c. late menarche
d. multiple previous pregnancies
Ans: b. Nulliparity, early menarche, and history of a first-degree relative with breast
cancer are all risk factors for breast cancer. Fibrocystic disease is not a risk factor
for breast cancer
Q. Which of the following is associated with Lyme disease?
a. The infection is carried by mosquito larvae.
b. The infectious pathogen is Borrelia burgdorferi.
c. Nervous system involvement does not occur.
d. All patients present with a typical rash known as erythema chronicum migrans
Ans: b. The infectious pathogen of Lyme disease is Borrelia burgdorferi. The carrier
is the Ixodes genus of tick. Many patients present with erythema chronicum
migrans but not all.
Sunday, 10 December 2017
DERMA SPOTTER
Q. What is the diagnosis?( Clue: Xlinked dominant disease)
1) Becker disease
2) Incontinenta Pigmenti
3) Ichthyosis
4) Pemphigus vulgaris
Ans: 2) Incontinenta Pigmenti.
Incontinentia pigmenti is a complex developmental syndrome due to an X-linked dominant
trait that is usually lethal in males; 95% of cases are females.Vesicular, verrucous, and pigmented
skin lesions are usually seen.
Q). 34 years old female after sun exposure, what is the diagnosis?
1) Acne
2) Solar eczema
3) polymorphic light eruption
4) SLE
Ans: 3) Polymorphic light eruption.
This is a common intermittent skin reaction to UV exposure, which may represent a delayed type
hypersensitivity response to UV-induced cutaneous antigens. PLE presents with
an itchy, non-scarring, symmetrical papular rash
on light-exposed sites within hours or days of significant sun exposure in young female usually below 30 years of age.
Large and small papules, papulopustules, and vesicles can occur. The eruption is transient, and resolves within several days, but it may persist if exposure continues.
Cutaneous lupus should be considered as differential diagnosis, and a minority of patients with PLE may subsequently develop lupus after several years .
Q). Skin eruption in a 26 year old male after scarlet fever.what is the diagnosis?
1) TSS
2)SSSS
3) Septic shock
4) Lyells syndrome
Ans: 1) TSS.
Scarlet fever (scarlatina) is an acute infection with a toxin-producing strain of Streptococcus pyogenes. Complications caused by the toxin or bacterial invasion include meningitis,
osteomyelitis, rheumatic fever, and glomerulonephritis.
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