A 14-yo ♂️ lived on a farm: a 1-month history of episodic headaches, vomiting, & papilledema
MR: a multiloculated cyst of the brain (A) with a hypointense rim and small projections in T2 phase (B, arrow) 1/5
CT of the body: no other sites of disease.
A craniotomy was performed, during which saline irrigation was used to separate the cyst wall from the brain to avoid rupture. 2/5
🔬: an echinococcal laminated membrane lined by a germinal layer with daughter cysts (Panel D, arrows) and protoscolices (inset, arrows) with hooklets (arrowhead).
PRIMARY CEREBRAL CYSTIC ECHINOCOCCOSIS FROM ECHINOCOCCUS GRANULOSUS 3/5
A 29-YO♂️, 6 months before, HIV + & non–drug-resistant pulmonary tuberculosis, antiretroviral & 4-drug antituberculous therapy initiated but soon reduced to rifampin & isoniazid only: abdominal pain on the L side
CT: ? 1/5
A 50-YO♂️of North India, visited bat caves & a bird sanctuary in Thailand: multiple plaques & nodules on his face, neck, arms & trunk with hoarseness, fever, weight loss for months
Laryngoscopy: nodules over the tonsils & posterior pharyngeal wall 1/4
Skin & laryngeal 🔬: histiocytes with intracellular & extracellular PAS+ yeast cells
Skin biopsy🧫: tuberculate macroconidia confirmed as H. capsulatum var. capsulatum
Ab against Histoplasma by ID:➕
In immunocompetent hosts, when chronic disseminated histoplasmosis occurs from pulmonary infection, oral ulcers, nodules, and vegetative plaques are common and dissemination to liver, spleen, bone marrow, and other organs is frequent. 3/4
Diagnosis is usually suspected on visualization of characteristic intracellular yeast (blastoconidias), the pathogenic or tisular form, with a clear rim and garnulomatous cellular infiltrate in tissue specimen or lymph node aspirate 3/7
@olaya_sm Con 🔍: Hiperqueratosis subungueal (&), borde distal irregular, zonas parduzcas de aspecto hemorrágico (&) y patrón multicolor de lámina ungueal con áreas verdes ($) y azul-negruzcas (*), y otras longitudinales amarillentas (→)