PET scanning in sarcoidosis.

Sarcoidosis is a multisystem granulomatous disorder that most commonly presents with pulmonary involvement. The diagnosis is suggested on the basis of clinical and radiologic manifestations and is supported by the histological demonstration of noncaseating granulomas in affected tissues. Different imaging modalities, including chest radiography, X-rays, computed tomography, magnetic resonance imaging, and (67) Ga scintigraphy are currently employed to help diagnose and help plan treatment strategy in sarcoidosis patients.

Peripheral T-cell lymphoma with endobronchial involvement.

Peripheral T-cell lymphoma unspecified (PTCL-U) is a lymphoproliferative disorder characterized by localized malignant T-lymphocyte infiltration of the skin. PTCL-U is a rare disease of the elderly with a low 5-year survival rate (16%). The skin is affected variably with localized plaques, nodules, or tumors.