Random facts Flashcards
X-ray effects on fetus
Microcephaly, intelletual disability
Scoliosis + high or flat arches
Charcot-Marie-Tooth (loss of structural proteins for myelin sheath or peripheral nerve function)
Freidrich ataxia (no frataxin = mitochondrial iron storage protein)
Increases level of 6-MP and azathioprine
Allopurinol (inhibits XO)
Action of teres minor
Adduction and lateral rotation of arm
Mitral regurgitation, multiple hamartomas, renal angiomyolipoma, seizures, mental retardation, increased incidence of subependymal astrocytomas, ungal fibromas
Tuberous sclerosis
(+ cardiac rhabdomyomas, Shagreen patches, Ash-leaf spots)
Activating mutation of GNAQ gene
Sturge Weber
Flat, well-circumscribed lesion < 1 cm
Macule
Remnant of gubernaculum
Males - anchors testes in scrotum
Females - round ligament and ovarian ligament
Failure of genital tubercle to position properly
Epispadias
Increased thickness of stratum corneum with retention of nuclei
Parakeratosis
(psoriasis)
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Pityriasis with herald patch and Christmas tree distribution
Pain to anterior 2/3 of tongue
V3
Which 3 areas of the brain have no BBB?
- Area postrema - vomiting
- OVLT - osmoregulation
- Neurohypophysis - ADH release/osmoregulation
Sequence
Abnormalities result from a single primary embryological event (ex. Potter sequence)
Glabrous (hairless) skin info
Meissner corpuscle
Pain on external rotation of knee
Medial meniscus
What (besides HIV) increases the risk of developing PML?
Natalizumab (alpha-4 integrin used for AI d/o’s)
(PML = JC virus reactivation)
Early-onset glaucoma
Sturge-Weber
Pain on internal rotation of knee
Lateral meniscus injury
Meissner corpuscle function
Dynamic, fine touch, position sense for glabrous (hairless) skin
Down and out eye with mydriasis
PCOM aneurysm
Congenital cause of Fanconi syndrome
Wilson disease
Defective osteoclasts
Osteopetrosis (CA deficiency)
3rd arch
Stylopharyngeus, CN IX
Osteoma of facial bones
Gardner syndrome
Vesicle containing pus
Pustule
5-FU rescue
Uridine
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Keratoacanthoma - rapidly evolving SCC that may spontaneously involute
(Cup-shaped lesion filled with necrotic keratin debris)
Locked-in syndrome
Basilar artery stroke or central pontine myelinolysis
Perimysial inflammation
Dermatomyositis
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Pityriasis
(all this crap will self-resolve within 6-8 weeks)
Paraventricular nucleus of hypothalamus
Oxytocin
Destruction of this nucleus causes obesity
Ventromedial
Gottron patches
Dermatomyositis
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Neurofibromin
Mutated TSG in NF1 = negative regulator of Ras
Cafe au lait spots, Lisch nodules, pheochromocytomas, neurofibromas in skin, optic gliomas
NF1
Separation of epidermal cells
Acantholysis
Where is ADH made?
Supraoptic nucleus of hypothalamus
Basal nucleus of Meynert
ACh synthesis
Broken down by XO
6-MP, azathioprine
Lateral rotation of arm
Infraspinatus (suprascapular N)
Teres minor (axillary N)
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Loss of sensation over dorsal and palmar aspects of lateral 3 1/2 fingers
Median nerve (C5-T1)
Origin of upper 1/3 of vagina? Lower 2/3?
Upper 1/3 = paramesonephric ducts
Lower 2/3 = urogenital sinus
Two free nerve endings
C and A-delta fibers
Renal tubular defect that causes HTN + too much Na+
Liddle syndrome
(Overactive Na+ transport in collecting duct)
Keratoacanthoma
Rapidly progressive SCC of skin that may spontaneously regress within months
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Actions of supraspinatus
Abducts arm initially before deltoid
Loss of eversion and dorsiflexion
Common peroneal (L4-S2)
Avascular necrosis risk after fracture
Scaphoid
Loss of sensation on sole of foot
Tibial nerve (L4-S3)
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Schiller Duval body - yolk sac tumor
(look like glomeruli)
Optic glioma
NF1
Lichen planus is associated with:
HCV!!
Amifostine
Free radical scavenger that prevents nephrotoxicity with cisplatin
Where is GABA synthesized?
Nucleus accumbens
McMurray test
Medial/lateral meniscus injuries
Pain on external injury = medical meniscus
Pain on internal injury = lateral meniscus
Supraoptic nucleus of hypothalamus
ADH
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Ungal fibroma - tuberous sclerosis
Treatment of CNS tumors
Nitrosureas
(carmustine, lomustine, semustine, streptozocin)
Dried exudate
Crust
Pigmented iris
NF1 (Lisch nodules)
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Prognosis of pityriasis rosea
Self-limited, 6-8 weeks
Inhibits thymidylate synthase
5-FU
Action of infraspinatus
Laterally rotates arm
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Port-wine stain of Sturge-Weber
Inhibits ribonucleotide reductase
Hydroxyurea
Space constant
Distance at which 37% of graded potential has disappeared
(Increased by myelination)
Slow pain/temp fibers
C fibers
(unmyelinated)
Ipsilateral tongue paralysis
Specific for Anterior spinal artery stroke
(CN XII + lateral corticospinal tract + medial lemniscus)
Treacher Collins syndrome
Failure of 1st branchial arch to develop
(mandibular hypoplasia, facial abnormalities)
Used to ablate BM before transplant
Busulfan
(can cause hyperpigmentation and pulmonary fibrosis if used in actual patient)
Autoantibodies associated with dermatomyositis and polymyositis
Anti-Jo1, anti-SNP, anti-Mi-2
Risk with scaphoid fracture
Avascular necrosis
4 stages of Paget disease
- Lytic = osteoclasts
- Mixed = osteoclasts + osteoblasts
- Sclerotic = osteoblasts
- Quiescent = minimal activity
Large, myelinated, quickly adapting sensory corpuscles
Meissner corpuscle
Pacinian corpuscle
Pitching injury
Infraspinatus (suprascapular N)
(Can’t laterally rotate or adduct as well)
Loss of interossei/abduction and adduction of fingers
Ulnar nerve (C8-T1)
Elevated solid lesion > 1 cm
Plaque
Effect of myelin on conduction
Increases space constant and velocity
Ipsilateral leptomeningeal angioma (=epilepsy) + intellectual disability + espiscleral hemangioma
Sturge-Weber
Decreased thigh flexion and leg extension
Femoral nerve (L2-L4)
List the deep nuclei of the cerebellum from lateral to medial
Dentate, emboliform, globose, fastigial
(don’t eat greasy food)
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In utero exposure increasing risk for ADHD
Nicotine/CO
Posterior hip dislocation
Superior gluteal nerve (L4-S1) and/or inferior gluteal nerve (L5-S2)
Destruction of this nucleus causes anorexia
Lateral
Trauma to politeal fossa - which nerve and artery?
Tibial nerve and popliteal artery
Shagreen patches
Tuberous sclerosis
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Cardiac rhabdomyoma
Tuberour sclerosis - blocks valves
Use for nitrosureas
CNS tumors
(carmustine, lomustine, streptozocin, semustine)
MRI on the right?
(left is normal)
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Dandy Walker
(No vermis + cystic dilation of 4th ventricle)
Basal epidermal layer + hair follicle info
Merkel disc
SERM for breast CA? Osteoporosis?
BCA - Tamoxifen
Osteoporosis - Raloxifene
Endomysial inflammation
Polymyositis
3 diseases predisposing to osteosarcoma
Paget disease
Retinoblastoma
Li-Fraumeni
Risk with hook of hamate fracture
Ulnar nerve injury
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Erythema multiforme
(Target lesions - most commonly HSV, also mycoplasma, sulfas, beta-lactams, phenytoin, cancers, and autoimmune diseases)
Contralateral hemianopia with macular sparing
PCA stroke (wipes out occipital cortex)
Extremely high risk for spontaneous abortion
Vitamin A
Dexrazoxne
Chelates iron to prevent cardiomyopathy with doxorubicin
Facial nucleus lesion
Specific to AICA stroke = paralysis of face, no taste on anterior 2/3 of tongue (but can still feel it = V3), no lacrimation from submandibular/sublingual glands, no corneal reflex
Loss of sensation of dosrum of foot
Common peroneal nerve (L4-S2)
Varus stress
LCL injury
Childhood tumors
Dactinomycin
(Ewing sarcoma, rhabdomyosarcoma, Wilms tumor)
Congenital activation of epithelial Na+ channel
Liddle syndrome
Risk with lunate dislocation
CTS
Loss of sensation over dorsal hand
Radial nerve (C5-T1)
Decreased adduction of thigh
Obtruator (L2-L4)
Failure of 1st branchial arch to develop
Treacher Collins
Appendages in wrong location
Homeobox mutations
Tamoxifen vs raloxifene
Tamoxifen = agonist in endometrium and bone, antagnoist in breast
Raloxifene = antagonist in endometrium, agonist in bone, no action on breast
Palpate which landmark for pudendal nerve block during labor?
Ischial spine
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Hard time getting up from seat
Inferior gluteal nerve (L5-S2)
Leptin inhibits which nucleus of the hypothalamus?
Lateral, which stimulates hunger
Snuff box
Scaphoid
Ophthalmological abnormalities in neonate
Mom used warfarin
(This is why we use HEPARIN in pregnancy = doesn’t cross placenta; warfarin also associated with bone deformities, fetal hemorrhage, and abortion)
Ulnar nerve injury with fracture
Hook of hamate
Diaphyseal tumor
Ewing’s sarcoma
Loss of forearm flexion
MC (C5-C6)
Garnder syndrome
FAP + osteomas + fibromatosis of retroperitoneum
Cause of dermatitis herpetiformis
IgA deposition at papillae
Defect in ability of alpha intercalated cells to secrete H+
RTA type I (pH > 5,5)
Carpal tunnel syndrome with dislocation
Lunate
Loss of sensation over medial 1 1/2 fingers
Ulnar nerve (C8-T1)
Defect in ability to proximal tubule cells to secrete HCO3-
RTA type II (pH < 5.5)
Placental ALP
Seminoma
(vs. LDH and hCG in dysgerminoma)
Muscles of facial expression
2nd arch, CN VII
Connexons
Components of gap junctions that permit electrical and chemical signaling between cells
Hyperkalemic RTA
Type IV (hypoaldosteronsim)
Salt and pepper skull
Hyperparathyroidsm
Stylopharyngeus muscle
3rd arch, CN IX
Arylsulfatase A deficiency
Metachromatic leukodystrophy = ataxia + dementia
CNS hamartomas
Tuberous sclerosis
(+ skin hamartomas)
Epiderminal accumulation of fluid in the intercellular spaces
Spongiosis
(eczema)
Leptin stimulates which nucleus of hypothalamus?
Ventromedial
Ebstein anomaly
Mother uses lithium during pregnancy; atrialized right ventricle
Fibular neck fracture
Common peroneal (L4-S2)
Adherens junctions
Below tight junctions; connect cytoskeleton of adjacent cells via cadherins
Cavernous hemangiomas in skin + hemangioma in cerebellum, retina, brainstem
VHL
Fractured surgical neck of humerus or anterior dislocation of humerus
Axillary nerve +/- posterior circumflex artery injury
(no abduction > 15 degrees, loss sensation over deltoid and lateral arm)
Medial epicondyle of humerus fracture
Ulnar nerve (C8-T1)
(Radial deviation with wrist flexion, loss of abduction and adduction of fingers, loss of sensation over medial 1 1/2 fingers)
Increased hat size
Paget disease
Inability to curl toes
Tibial nerve (L4-S3)
Crutches
Radial nerve compression (wrist drop)
Anterior nucleus of hypothalamus
Cooling, parasympathetic
Sublimation vs. reaction formation
Sublimation - mature - replacing unwanted desire with a similar course of action that doesn’t conflict with values
Reaction formation - immature - replacing unwanted desire with its opposite
Large, fluid-filled blister > 1 cm
Bulla
Increased thickness of stratum corneum
Hyperkeratosis
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Lichen planus
(sawtooth infiltration of lymphocytes at dermal-epidermal junction)
MC rotator cuff injury
Supraspinatus
(Trouble abducting below 15 degrees)
Sonic hedgehog mutations
Holoprosencephaly
Posterior nucleus of hypothalamus
Heating, sympathetic
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Bullous pemphigoid
(IgG against hemidesmosomes)
Rescue with uridine
5-FU
Most common testicular tumor in older males
Lymphoma (metastasis)
Toxicity with allopurinol
6-MP, azathioprine = metabolized by XO
(purine analogs that inhibit de novo purine synthesis)
Artery involved in avascular necrosis of femoral head
Medial circumflex around femoral head
How might a pinealoma manifest?
Paralysis of conjugate vertical gaze due to compression of superior colliculi below pineal gland
(Parinaud syndrome)
BRAF mutation
Melanoma
(if metastatic, use vemuRAFinib)
Infectious cause of a lower nerve palsy?
Polio can cause superior gluteal nerve paralysis –> Trendelenburg gait
Difficulty climbing stairs
Inferior gluteal nerve (L5-S2)
Trauma to lateral thorax - which artery and nerve?
Long thoracic nerve, lateral thoracic artery
Tumor within medullary cavity
Chondrosarcoma
Superficial laceration of palm
Recurrent branch of median nerve
(NO SENSORY LOSS + ape hand = loss of opposition, flexion, and abduction of thumb)
Loss of sensation over lateral forearm
MC (C5-C6)
Trauma to cubital fossa - which nerve and artery?
Median nerve + brachial artery
Ash-leaf spot
Tuberous sclerosis
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Epidermal hyperplasia (increased stratum spinosum)
Acanthosis
Fast pain/temp fibers
A-delta fibers
(myelinated)
Small, fluid-filled blister < 1 cm
Vesicle
Pacinian corpuscle function
Vibration and pressure from deep skin layers, tendons, and joints
Axillary nerve (rotator cuff)
Teres minor
4 mature defense mechanisms
- Altruism
- Sublimation
- Suppression
- Humor
Suprascapular nerve
Supraspinatus and infraspinatus
Muscles of mastication
1st arch - CNV2,V3
Elevated solid lesion < 1 cm
Papule
Epiphyseal tumor
Giant cell tumor (soap bubble)
Treatment of osteopetrosis
BM transplant - osteoclasts derived from monocytes
Placental abruption
Cocaine
Ventromedial nucleus of hypothalamus
Satiety, stimulated by leptin
Defective breakdown of VLCFA’s
Adrenoleukodystrophy
(Buildup of VLCFA in adrenals, testes, and nervous system)
Unmineralized osteoid around trabeculae
Vitamin D deficiency
Transient smooth papule or plaque
Wheal
Chloride diuresis
Prevents nephrotoxicity with cisplatin as the drug requires a low Cl- enviornment to become active
Loss of inversion and plantarflexion
Tibial nerve (L4-S3)
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Wickham striae
(Oral manifestation of lichen planus)
Fracture to medial malleolus - which nerve and artery?
Tibial nerve and posterior tibial artery
Desomosome function
Structural support via keratin interactions
Merkel disc function
Static pressure (edges, shapes), position sense for basal epidermal layer and hair follicles
Impaired ammoniagenesis due to hyperkalemia
RTA IV
(Due to hypoaldosteronism or K+ sparing diuretics = less buffering ability so decreased H+ excretion = acidosis)
Abnormalities result from a single embryological event
Sequence
Failure of urogential folds to fuse
Hypospadias
Prevent cardiomyopathy with doxorubicin
Dexrazoxane (iron chelating agent)
Flat, well-circumscribed lesion >1 cm
Patch
Maternal diabetes defects
Macrocephaly
Transposition of great vessels
Caudal regression
Neural tube defects
(Give insulin for gestational diabetes!)
Use for busulfan
Ablate BM before transplant
Cooling, parasympathetic
Anterior nucleus of hypothalamus
(Anterior = A/C)
Low birth weight
Nicotine/CO
Supracondylar fracture of humerus
Median nerve (C5-T1)
Ostetitis fibrosa cystica
Hyperparathyroidsim –> “Brown tumors” due to fibrous replacement of bone + subperiosteal thinning
Aneurysm that can create visual field problems
ACom aneurysm
HOX mutation
Limbs in wrong place
Isolated increase in alk phos
Paget disease
Most commonly used GC’s in chemo? MOA?
Prednisone, prednisolone
Trigger apoptosis of lymphocytes (so good for CLL, non-Hodgkin’s lymphoma)
Natalizumab
Increases risk for PML
PV vs BP:
Nikolsky sign +
PV
(Nitolsky sign = separation of epidermis when you stroke skin)
Action of subscapularis
Medial rotation of arm and adduction
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Bone pain resolves with ASA
Osteoid osteoma (osteoblast proliferation)
Hypoaldosteronism
Type IV RTA (pH < 5.5)
Hunger mediated by:
Lateral nucleus of hypothalamus
Scoliosis + high arched foot + stumbling + loss of DTRs + nystagmus + hypertrophic cardiomyopathy
Freidrich ataxia
(No frataxin = mitochondrial iron storage protein)
Heating, sympathetic
Posterior nucleus of hypothalamus
2 uses for trastuzumab
HER2/neu+ breast cancer
Gastric cancer
(causes cardiotoxicity!)
Besides a retinoblastoma, what other tumor do patients with Rb mutation get?
Osteosarcoma
Resorptive damage to 2nd and 3rd phalanges
Hyperparathyroidism
No galactocerebrosidase
Krabbe disease
(Destruction of myelin = optic atrophy, developmental delay, peripheral neuropathy)
Bilateral renal cell carcinoma
VHL
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Angiofibromas of tuberous slerosis
Tendon, deep skin layers, and joint info
Pacinian corpuscle
AFP tumor marker
Yolk sac tumor
Lateral nucleus of hypothalamus
Hunger, inhibited by leptin
Metaphyseal tumor
Osteochondroma
Osteosarcoma
Patient drops right hip when standing on left leg. What nerve is injured?
LEFT superior gluteal
(Lesion is contralateral to side of dropped hip)
K+ sparing diuretics can cause which type of RTA?
IV
(Remember type IV causes hyperkalemia and is due to defective ammonia production)
Neurofibromas in skin
NF1
Scoliosis + high arched or flat foot + sensory defects + motor defects
Charcot-Marie-Tooth disease
(Defective proteins for peripheral nerve function or myelin production)
Paget disease predisposes to:
High-out CF
Osteosarcoma
PV vs. BP:
Oral mucosa
PV
Bone-in-bone appearance on X ray
Osteopetrosis
Remnant of 2nd-4th branchial clefts
Branchial cleft cyst in lateral neck
Mutation associated with holoprosencephaly
Sonic hedgehog
Adduction of arm
Teres minor (axillary N)
Subscapularis (subscapular N)
Laryngeal muscles
6th arch, recurrent branch of X
(except cricothyroid)
Prevention of nephrotoxicity with cisplatin
Amifostine (free radical scavenger) and chloride diuresis (cisplatin has to be activated in low Cl- enviornments)
Inhibits topo I
Irinotecan, topotecan
Function of integrins
Maintain integrity of basolateral cell membrane by binding collagen and laminin in basement membrane
hCG, LDH tumor markers
Dysgerminoma
(vs. placental ALP in seminoma)
Where is oxytocin made?
Paraventricular nucleus of hypothalamus
What’s contained in the blisters of bullous pemphigoid?
Eosinophils
Loss of ____ promotes metastasis
E-cadherin (adherens junctions)
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Call-Exner bodies (pseudo-follicles) or granulosa cell tumor
Loss of supination
MC (C5-C6)
Loss of hip extension
Inferior gluteal nerve (L5-S2)
Use for dactinomycin
Childhood tumors
(Wilms tumor, rhabdomyosarcoma, Ewing sarcoma)
Galant reflex
Stroke along spine when baby face down and spine laterally flexes toward stimulation
Moro reflex
Extend and abduct limbs when startled, followed by drawing limbs in
Loss of abduction, opposition, and flexion of thumb with no sensory loss
Recurrent branch of median nerve
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BCC
(Pallisading nuclei!)
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Pemphigus vulgaris
(IgG against desmoglein in stratum spinosum)
Inhibits topo II
Etopside, teniposide
Caudal regression syndrome
Uncontrolled maternal diabetes
Absent sacral and sometimes lumbar plexi = flaccid paralysis of lower limbs
(Think baby with diabetic neuropathy)
2 uses for imatinib
CML, c-kit GIST
Sporadic neurocutaneous disorder
Sturge-Weber
Muscles of palate and pharynx + cricothyroid from larynx
4th pharyngeal arch, CN X
Aplasia cutis congenita
Methimazole
Function of hemidesomosomes
Connect keratins in basal cells to basement membrane
Nucleus ambiguus lesions
Specific to PICA stroke = dysarthria + hoarseness (CN IX and X)
Decreased sensation of medial thigh
Obtruator
Valgus stress
MCL injury
Flaking off of corneum stratum
Scale
Developmental delay + peripheral neuropathy + optic atrophy
Krabbe disease
(No galactocerebrosidse = myelin damage)
Mab for ITP
Rituximab
(inhibits CD20+ = no B cell activity)
Large, myelinated, slowly adapting sensory corpuscle
Merkel disc
Herald patch followed by Christmas tree distribution
Pityriasis rosea