Microscopy

Articles

acute inflammation
1 June 2004

Digital cases
Case 25 (HPC:25) : Acute appendicitis
Case 94 (HPC:94) : Acute appendicitis
Case 13 (HPC:13) : Acute synovitis
Definition: Acute inflammation is a rapid response to an injurious agent that serves to deliver mediators of host defense-leukocytes and plasma proteins-to the site of injury.
Types - Lesional patterns
acute inflammation
congestive inflammation
cellular acute inflammation
suppurative inflammation / suppuration
abcess / abcesses / abcedation (...)
dermatomyositis
4 February 2005

juvenile dermatomyositis
Images
4M gottron papules, ulcers, nailfold telangiectasias, heliotrope, prox muscle weakness : juvenile dermatomyositis
https://twitter.com/globaldermie/status/782431839197753344
Juvenile dermatomyositis. 15 y/o F w/ Gottron’s lesions, dorsal hands, elbows & knees, ⇈ muscle enzymes & joint problems. Elbow bx
https://twitter.com/Dermpathl/status/811239150758273024
Synopsis
dermatomyositis-associated cardiomyopathy
dermatomyositis-associated (...)
lentigo simplex
8 July 2004

The simple lentigo is a brown to black, sharply circumscribed and usually uniformly pigmented macule, measuring a few millimeters in diameter. It may be found anywhere on the body surface.
The term ‘labial melanotic macule’ is now used for a clinically similar lesion on the lip that was previously referred to as a lentigo.
Microscopy
There is variable basal hyperpigmentation with an increased number of single melanocytes in the basal layer.
There is usually acanthosis, with regular (...)
corpus luteum
17 November 2004

corpora lutea (corpus luteum)
Definition: Corpus luteum is 1 to 2 cm, round yellow, lobulated structure with cystic center. It has luteinized granulosa and theca cells.
In pregnancy, coprus luteum is larger, bright yellow with prominent central cavity, hyaline droplets and calcification. Progesterone from the corpus luteum maintains the uterus for implantation.
The corpus luteum secretes progesterone which induces a secretory endometrium. It normally regresses in 14 days unless it is (...)
salivary mucocele
4 April 2005

mucocele; labial mucocele
Definition: Mucoceles and mucous retention cysts most often involve the minor salivary glands of the lower lip, buccal mucosa, and floor of the mouth.
Mucoceles lack an epithelial lining and are therefore not true cysts.
They are thought to result from ductal obstruction or trauma and represent accumulation and extravasation of mucus into adjacent tissues.
Images
salivary mucocele https://twitter.com/VishwasParekh/status/709730349677473793 (...)
actinic keratosis
6 July 2004

solar keratosis, senile keratosis, pre-epitheliomatous keratosis WKP
Digital cases
UI:906 - Actinic keratosis.
UI:917 - Actinic keratosis.
UI:1826- Actinic keratosis.
JRC:10567 : Actinic keratosis.
JRC:10569 : Actinic keratosis.
Definition: Actinic keratosis is a premalignant condition of thick, scaly, or crusty patches of skin
It is more common in fair-skinned people and it is associated with those who are frequently exposed to the sun, as it is usually accompanied by (...)
granulomatous colitis
18 October 2004

Etiology (exemples)
Crohn disease
tuberculous enterocolitis
digestive CGD (chronic granulomatous disease)
Hermansky-Pudlak syndrome
See also
granulomatoses digestive granulomatoses
hepatoblastoma
16 March 2004

hepatoblastomas
Definition: Hepatoblastoma is a malignant embryonal liver tumor that occurs almost exclusively in infants and very young children.
Image
Macroscopy : https://twitter.com/DraEosina/status/762631086207893506
Cytology: https://twitter.com/AdamGomezMD/status/720632495671087104
https://twitter.com/MArnold_PedPath/status/736000944303808512
Hepatoblastoma is composed of epithelial and mesenchymal elements in varying proportions and at various stages of differentiation. The (...)
Langhans cells
1 June 2004
Langhans cells
necrosis
9 November 2004
tissular death

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