What is reticulin fibrosis?

Increased reticulin staining (reticulin fibrosis) is associated with many benign and malignant conditions while increased trichrome staining (collagen fibrosis) is particularly prominent in late stages of severe myeloproliferative diseases or following tumour metastasis to the bone marrow.

When does myelofibrosis turn into leukemia?

Myelofibrosis, a type of myeloproliferative neoplasm (MPN), typically moves through two stages — chronic and accelerated – before reaching the blastic phase and turning into acute myeloid leukemia (AML).

Is myelofibrosis a type of leukemia?

Myelofibrosis is considered to be a chronic leukemia — a cancer that affects the blood-forming tissues in the body. Myelofibrosis belongs to a group of diseases called myeloproliferative disorders.

Is a megakaryocyte a white blood cell?

Megakaryocytes (the cells that produce platelets) and erythrocytes (red blood cells) are not formally considered to be leukocytes, but arise from the common myeloid progenitor cells that produce the other cellular components of blood.

Which is the correct grade for reticulin fibrosis?

In case three, both methods reveal a grade 2 of reticulin fibrosis ( E, F ); however, method II displays an unspecific coarse framing of adipocytes ( F ). A, C, E, Automatic staining system with modified Gomori’s stain (method I).

Is the reticulin stain normal for myelofibrosis?

Granulomas are absent. Reticulin stain reveals that reticulin is mildly increased (MF1/3). Trabecular bone is normal. The marrow aspirate smears are spicular and cellular. Megakaryocytes are increased and show prominent dysmegakaryopoiesis, including hyper and hyposegmented nuclei and increased nuclear/cytoplasmic ratio.

When does reticulin grade decrease after discontinuation of romiplostim?

Reticulin grade often decreased soon after romiplostim discontinuation. In the prospective study, reticulin grade during romiplostim treatment remained within the normal range for all patients and was increased in only 1 of 6 patients with pretreatment and on-treatment bone marrow results.

Are there any studies on bone marrow reticulin?

This report describes bone marrow findings from romiplostim-treated rats, a retrospective analysis of reticulin observed in romiplostim ITP clinical trials, and a prospective clinical study of the effects of romiplostim on bone marrow morphology.

https://www.youtube.com/watch?v=BQqCmetkdIk