Echinococcosis (Hydatid Cyst) Key Facts Terminology Synonyms Hydatidosis, echinococcosis Definition Infectious condition caused by tapeworms Etiology/Pathogenesis 4 types of Echinococcus E. granulosus E. multilocularis E. vogeli E. oligarthrus Clinical Issues…
Metastatic Sarcoma Key Facts Clinical Issues Multiple nodules on chest x-ray Cough Dyspnea Lung is most common site of metastases for soft tissue sarcomas from trunk and extremities Good prognosis…
Malakoplakia Key Facts Clinical Issues Most cases reported are associated with R. equi infection in AIDS patients or immunocompromised hosts Presentation Cough, fever, dyspnea Microscopic Pathology Sheets of histiocytes admixed…
Usual Interstitial Pneumonia Key Facts Terminology Pattern of lung damage characterized by bilateral, diffuse, interstitial inflammation and fibrosis Clinical Issues Insidious onset of dyspnea and nonproductive cough Poor prognosis Mean…
Paragonimiasis Key Facts Terminology Synonyms: Pulmonary distomiasis, lung fluke disease, parasitic hemoptysis, tojil (earth-borne disease), and gregarinosis Infectious condition caused by trematode Etiology/Pathogenesis Raw or partially cooked crab or crayfish…
Aspergillosis Key Facts Terminology Infection caused by fungus of the species Aspergillus Clinical Issues Fungus balls may be asymptomatic and discovered incidentally or can present with massive, life-threatening hemoptysis Immunosuppressed…
Dirofilariasis Key Facts Etiology/Pathogenesis Caused by Dirofilaria immitis Dirofilariasis is more common in dogs Humans are accidental hosts Clinical Issues Uncommon infectious condition Can occur at any age, and infection…
Mesothelial Hyperplasia Key Facts Clinical Issues Incidental finding in pleural biopsy specimens done for other causes Finding in pleural fluid cytology for assessment of pleural effusion Usually regresses spontaneously when…
Overview of Malignant Thymic Neoplasms WHO type A thymoma (spindle cell thymoma) shows characteristic cytomorphology of the tumor cells with elongated spindle cells displaying nuclei that contain dispersed chromatin and…
Herpes Simplex Virus Key Facts Terminology Lung infection caused by double-stranded DNA herpes simplex virus-1 Clinical Issues In infants, disease is transmitted by mother during passage of fetus through infected…
