We describe the case of a 47-year-old Caucasian male patient who developed sarcoidosis 18 months after he was diagnosed with pulmonary tuberculosis for which he was treated according to guidelines. The presentation of sarcoidosis was very similar to his first presentation when he was diagnosed with tuberculosis. Mycobacterium tuberculosis as a possible aetiological agent in sarcoidosis has been...

Sarcoidosis is an antigen-mediated disease of unknown aetiology, characterized by the presence of non-caseating epithelioid cell granulomas in multiple organs. Cutaneous involvement in sarcoidosis is classified as specific, when biopsy reveals non-caseating granulomas, and non-specific, typically erythema nodosum. Granulomatous skin lesions occur in 9% to 37% of patients. The skin is the second...

The differential diagnosis of a pulmonary mass in an immunosuppressed host with a history of cancer is broad and includes malignant, infectious and inflammatory etiologies. Mycobacterium avium complex (MAC) is a rare cause of opportunistic infection in susceptible individuals that can present as either localized or disseminated disease. On radiologic studies, the pulmonary disease can manifest ...

OBJECTIVE To study the clinical and pathological characteristics of patients with intestinal tuberculosis. DESIGN Retrospective study. SETTING United Christian Hospital, Hong Kong. PATIENTS Patients with intestinal tuberculosis diagnosed between January 1995 and December 2004 inclusive. RESULTS The median age of the 13 male and 9 female patients was 53 years (range, 12-81 years). Ninete...

BACKGROUND Sarcoidosis is a multi-system disease characterized by the presence of non-caseating epithelioid granulomas in affected tissues, including skeletal muscle. These organized collections of immune cells have important pathophysiologic action including cytokine production leading to inflammation as well as enzymatic conversion of cholecalciferol to calcitriol via 1-α hydroxylase. There a...

BACKGROUND Intestinal tuberculosis and Crohn's disease are chronic granulomatous disorders that are difficult to differentiate histologically. AIMS To characterise distinctive diagnostic features of tuberculosis and Crohn's disease in mucosal biopsy specimens obtained at colonoscopy. METHODS Selected histological parameters were evaluated retrospectively in a total of 61 biopsy sites from 2...

orofacial granulomatosis(ofg) is a granulomatous disease of the orofacial region which appears usually as a persistent and/or recurrent labial soft tissues swelling in the orofacial region and is characterized histologically by a granulomatous inflammation. ofg may cause significant cosmetic and functional problems but can be prevented if the disease is diagnosed early and promptly treated. the...