Dr. Nancy Lee Harris (Pathology): May we have
the medical students’ diagnosis?
A Harvard Medical Student: The medical students
based their differential diagnosis on several features
of the case: the fact that the patient smoked,
the presence of painful lytic bone lesions, the
presence of lung lesions characterized by cystic
lucencies in the upper lobes, the multiple negative
cultures and normal laboratory-test results,
and the presence of granulomatous-appearing
features on examination of the biopsy specimen.
We thought that the diagnosis that best unified
these features was LCH and that a transbronchial
or open-lung biopsy should be performed.
ハーバード医学生:医学生は識別診断書をケースに対する様々な主観点にもとづいて製作しています:患者の喫煙状況、痛みを伴う溶解性骨変の有無、 肺葉上部にある嚢胞の低吸収域による肺病変の有無、複数の除外例や通常の実験室試験結果 、全ての肉芽腫の出現のバイオプシー実例の検査との検証。
我々は、これらの検証を最高に統一した診断は、LCHである、そして、経気管支的もしくは開肺的バイオプシーの実行が必要であると考える。
ハーバードの医大生: 医大生の彼らの診断別のケースにより、いくつかの特徴に基づいていました
: 患者が喫煙したという事実、大変な苦痛を伴う溶解性骨病変の存在、耳たぶ上部のの嚢胞の低吸収域、複数の陰性培養や正常な実験室試験結果によって裏付けられた肺機能障害の存在、および生検標本の実験における肉芽種性疾患の存在。
私たちは、これらの特徴を最もよく統一した診断が、LCHであり、経気管支か肺切開生検が実施されるべきであると思いました。
Dr. Harris: Dr. Sievers, would you tell us what
you were thinking and what you did to establish
a diagnosis?
Dr. Sievers: An infectious process had been
strongly suspected, but after the negative workup
for infectious causes and the finding of features
on chest CT that the radiologists thought were
characteristic of pulmonary LCH, we favored that
diagnosis as an explanation of both his lung and
bone lesions. Before proceeding with video-assisted
thoracoscopic surgery, we asked the pathology
service to re-review the bone-biopsy specimen
with this diagnosis specifically in mind.
This case illustrates the difficulty of establishing
the diagnosis of a histiocytic or dendritic-cell
disorder. Histiocytes and dendritic cells are common
components of both infectious and noninfectious
inflammatory processes, and histiocytic
disorders and neoplasms may have a prominent
inflammatory background. Thus, clinical correlation
is essential, and the clinician should not
hesitate to convey clinical suspicion of any histiocytic
disorder to the pathologist.
This patient has LCH involving bone and presumably
also lung, on the basis of imaging studies
and his smoking history, suggesting multisystem
disease27 (Table 2).
このLCHを骨に持ち、そして肺にあるとも思われている患者は、イメージ研究、そして喫煙歴をもとに、マルチシステム病気27を暗示しています。
(表2)