網路內科繼續教育
有效期間:民國 89年07月01日 89年07月15日

    Case Discussion

     This 39-year-old woman was admitted because of weakness and numbness over right extremities since March 4, 2000.

     She was quite well until March 3 when she began to suffer from flu-like symptoms including general malaise, rhinorrhea and headache.When she was awakened in the next morning, she began to notice numbness and weakness over right upper and lower extremities that she could not climb stairs or comb her hair well. She visited Emergency Room of National Taiwan University Hospital where no fever, dysarthria, diplopia, slurred speech, facial palsy or sphincter incontinence was noted. There was no ear pain, chronic rhinorrhea or trauma history. Mild dragging of right leg, mild proximal muscle weakness and mildly increased deep tendon reflex were noted on neurological examinations. She was admitted on March 8. 

     On admission, the blood pressure was 120/70 mmHg, pulse rate 82/ min respiratory rate 20/min and body temperature 37.2oC. The body height was 149 cm and weight 49 kg. The head and neck were grossly normal. Mild capillary engorgement was found over the conjunctiva and lower lip. There were no goiter, jugular vein engorgement or lymphadenopathy over the neck. The breathing sound was clear and the heart rate was regular without thrill, heave or murmur. The abdomen was soft and flat with normoactive bowel sound. There were normal axillary and pubic hairs. The extremities were freely movable except mild proximal muscle weakness without sensory deficits .

    Tracing back her history, there was no hypertension, diabetes mellitus or other systemic diseases. There was a family history of unknown cause of frequent epistaxis and so does she. She doesn't smoke or drink alcohol. Laboratory results:

CBC
  WBC
(K/ul)
RBC
(M/ul)
Hb
(g/dl)
Hct
(%)
MCV
(fl)
MCHC
(g/dl)
Plat
(K/ul)
Seg
(%)
Eos
(%)
Baso
(%)
Mon
(%)
lym
(%)
Mar 4 10.8 4.59 15.0 42.9 93.5 35.0 188 77.9 0.2 0.2 4.3 17.4

Biochemistry
  AST  ALT

Albumin

Globulin  ALP Glucose Bilirubin(T) BUN Cr UA
  U/L U/L g/dl g/dl U/L mg/dl mg/dl g/dl mg/dl mg/dl
Mar 9 19 33 3.9 3.4 96 95 0.6 13.3 0.9 6.3

  T-CHO Na K Ca Cl P
  mg/dl mM mM mM mM mg/dl
Mar 9 203 142 4.0 2.39 101 3.6

VDRL: Negative
U/A, Stool: within normal limit
Blood culture: no growth
Coagulation: PT 12.2/11.5, PTT 31.6/31.1
Course and Treatment :

    Head CT showed a nodular lesion at left high frontoparietal lobe with obvious perifocal edema but no intracranial hemorrhage. MRI showed a space-occupying lesion with perifocal edema and ring-enhancing picture suggesting a brain  abscess . Decadron was administered since Mar 10. The numbness and weakness improved gradually. She received craniotomy on Mar 16 for abscess drainage and irrigation. Yellowish discharge from left parietal lobe was smoothly drained under ultrasound guidance. Focal seizure and twitching over right arm without unconsciousness ensued in that night, which were relieved spontaneously after a few minutes. Unasyn (Ampicillin/Sulbactam) and Gentamicin were administered since after operation. the abscess culture yielded Actinomyces meyeri . Penicillin G 1,800 MU/day was given since Mar 27, when the pathology of the tissue was abscess only without visible pathogen. A metastatic lesion or pulmonary tumor was suspected over the left lower lung field on a chest roentgenogram on Mar 16, which was previously described as suspective lymphadenopathy on Mar 8. Chest CT was performed on Mar 20. The impression of that lesion was pulmonary AV fistulae. One episode of epistaxis ensued on Mar 23 . No abnormal vessel engorgement except nyperemic mucosa was found. Pulmonary angiography was performed on Apr 6 and confirmed the diagnosis of pulmonary AV malformation. Spiral CT further documented multiple AVM and may provide a tool for follow-up. Trans-esophageal echocardiography on Apr 7 showed no ASD, no vegetation over all valves and good LV contractility. Duplex abdominal echo showed prominent hepatic arterial and normal hepatic venous flow with a vascular malformation over distal branch of vessel. She received parenteral antibiotics for 6 weeks and followed by oral antibiotics.

繼續教育考題
1.
(A)
The most common route of brain abscess is:
Acontiguous
Bhematogenous
Cprior cranial sugery
Dundetermined
2.
(B)
The most common pathogen of the brain abscess is
AEnterobacteriacea
Bstreptococci
Cstaphylococcus aureus
Dactinomyces. spp
3.
(B)
What is the drug of choice for actinomycotic brain abscess
Aoxacillin
Bpenicillin G
Cerythromycin
Dquinolone
4.
(D)
The risk factors of the brain abscess is except
AHIV carrier
Bpulmonary AVM
Cotitis media
Dnone of above
5.
(D)
which is wrong about Osler-Weber-Rendu syndrome:
Ano hereditary trait
Bautosomal dominant
Ctelangiectasia
Depistaxis
6.
(D)
What is the least possible infection site of actinomyces
Aoropharyngeal
Bfemale genital tract
CGI tract
Durinary tract
7.
(C)
Which one is correct about actinomyces
Aaerobic
Bprotozoa
Cbacteria
Dfungus
8.
(A)
Which one is associated with brain abscess
AOsler-Weber-Rendu syndrome
BMilwaukee shoulder
CFelty’s syndrome
Dcushings’ syndrome
9.
(A)
Which one is wrong about brain abscess:
Athe median age: 20-30 years
Bmale/female ratio is 2:1
C25% patient aged less than 15 years
Dfocal neurologic findings appear after 24-48hrs
10.
(D)
How long of antibiotic course is needed for actinomycotic abscess:
A1-2 months
B2-4 months
C3-6 months
D6-12 months

答案解說

答案解說:

病人為一39歲女性,來院主訴四日前開始覺右側肢體無力及麻木.病人本身健康情況良好,並無高血壓,糖尿病,高血酯症,或中風之病史.她在發病前一日曾經有過感冒症狀但是並不嚴重.除此之外,並無其他會導致單惻肢體無力之原因.理學檢查發現有相當輕微的右側肢體無力及深部肌腱反射增強.因此安排腦部電腦斷層檢查.才發現左側有一低回因區及病灶周圍水腫.為了更進一步了解鑑別腦部的病變,安排腦部核磁共振檢查.診斷是腦膿瘍.由於病人並無明顯的致病途徑所以尋找潛在的病因便非常重要.胸部X光發現疑似動靜脈廔管後來被胸部電腦斷層證實,並由血管攝影確定診斷.加上流鼻血,家族史,及微血管擴張,可診斷Osler-Weber-Rendu syndromes.而腦膿瘍培養長出Actinomyces meyeri.此菌生長在口咽,生殖道,腸胃道.它是G(-) anaerobic bacilli而治療上之首選為PenicillinG1800u per day. 而治療時間須要6-12個月.根據Harrison 14th edition 的描述,腦膿瘍之好發平均年齡為30-45歲而由Contiguous infection占40%為最多.


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