Photo Researchers ftp March 2011

Keratoacanthoma. Light micrograph of a section through a keratoacanthoma nodule. The cause of these lesions is unknown but they have many features of...

Lichen planus. Light micrograph of a section through skin affected by lichen planus, a clinically and histologically distinct form of dermatitis. The...

Muscular dystrophy. Light micrograph of a section through muscle tissue affected by Duchenne muscular dystrophy (DMD). Some of the muscle fibres (brig...

Rheumatoid arthritis. Light micrograph of a section through a joint with rheumatoid arthritis. Rheumatoid arthritis is caused by the immune system att...

Rheumatoid arthritis. Light micrograph of a section through the synovial membrane, the soft tissue lining a joint, with rheumatoid arthritis. The memb...

Herpes encephalitis. Light micrograph of a section through brain tissue that is inflamed due to an infection with the herpes virus. The white patches...

Glioblastoma brain tumour. Light micrograph of a section through a glioblastoma brain tumour. This is a cancer of glial tissue, the supportive tissue...

Brain tumour. Light micrograph micrograph of a section through an oligodendroglioma, a malignant (cancerous) tumour arising from oligodendrocytes. Oli...

Nervous system tumour. Light micrograph of a section through a ependymoma, a rare benign (non-cancerous) tumour arising from the ventricular lining of...

Cervical smear. Fluorescent light micrograph of cells obtained by carrying out a cervical smear test. A cervical smear, or pap test (after the papanic...

Cervical smear. Fluorescent light micrograph of cells obtained by carrying out a cervical smear test. A cervical smear, or pap test (after the papanic...

Tubal ectopic pregnancy. Light micrograph of a section through tissue from a fallopian tube, in a case of a tubal ectopic pregnancy. Ectopic pregnanci...

Tubal ectopic pregnancy. Light micrograph of a section through tissue from a fallopian tube, in a case of a tubal ectopic pregnancy. Ectopic pregnanci...

Uterine cancer. Light micrograph of a section through tissue from the uterus, in a case of uterine cancer. This is endometrial adenocarcinoma, a cance...

Uterine fibroid. Light micrograph of a section through tissue from the uterus, in a case of a uterine fibroid (leiomyoma). A fibroid is a benign tumou...

Grade 3 cervical cancer. Light micrograph of a section through tissue from the uterus, in a case of CIN (cervical intraepithelial neoplasia) grade III...

Invasive cervix cancer. Light micrograph of a section through tissue from the uterus, in a case of invasive cervical cancer. Cancer of the cervix is r...

Invasive cervix cancer. Light micrograph of a section through tissue from the uterus, in a case of invasive cervical cancer. Cancer of the cervix is r...

Endometrial hyperplasia. Light micrograph of a section through tissue from the endometrium, in a case of endometrial hyperplasia. The endometrium is t...

Endometrial hyperplasia. Light micrograph of a section through tissue from the endometrium, in a case of endometrial hyperplasia. The endometrium is t...

Uterine fibroid. Light micrograph of a section through tissue from the uterus, in a case of a uterine fibroid (leiomyoma). A fibroid is a benign tumou...

Uterine adenomyosis. Light micrograph of a section through tissue from the uterus, in a case of uterine adenomyosis. This term is used to describe the...

Pelvic endometriosis. Light micrograph of a section through tissue from the abdomen, in a case of pelvic endometriosis. Endometriosis is where parts o...

Hydatidiform mole. Light micrograph of a section through tissue from the uterus, in a case of a hydatiform mole. This is an abnormal form of pregnancy...

Choriocarcinoma. Light micrograph of a section through tissue from the uterus, in a case of a choriocarcinoma. This is a malignant (cancerous) tumour...

Vaginal smear. Light micrograph of cells obtained by carrying out a vaginal smear test. This test is used to diagnose bacterial infections such as vag...

Schwann cell tumour. Light micrograph of a section through a schwannoma, a benign (non-cancerous) tumour of Schwann cells, the protective sheaths of p...

Muscular atrophy. Light micrograph of a section through muscle fibres showing an area affected by neurogenic muscular atrophy (bottom right). Normal m...

Meningioma tumour. Light micrograph of a section through a meningioma. This is a benign (non-cancerous) tumour arising from the meninges (membranes) t...

Muscular dystrophy. Light micrograph of a section through muscle tissue affected by Duchenne muscular dystrophy (DMD). Some of the muscle fibres (pink...

Muscular dystrophy. Light micrograph of a section through muscle tissue affected by Duchenne muscular dystrophy (DMD). Some of the muscle fibres (dark...

Neurofibroma. Light micrograph of a section through a neurofibroma tumour. This is a slow-growing benign (non-cancerous) tumour that arises from Schwa...

Fossilized coral found in the northwest portion of Michigan's lower peninsula (Hexagonaria percarinata).

Red food dye settling into a vase filled with water. 1 of 13.

Red food dye settling into a vase filled with water. 2 of 13.

Red food dye settling into a vase filled with water. 3 of 13.

Red food dye settling into a vase filled with water. 4 of 13.

Red food dye settling into a vase filled with water. 5 of 13.

Red food dye settling into a vase filled with water. 6 of 13.

Red food dye settling into a vase filled with water. 7 of 13.

Red food dye settling into a vase filled with water. 8 of 13.

Red food dye settling into a vase filled with water. 9 of 13.

Red food dye settling into a vase filled with water. 10 of 13.

Red food dye settling into a vase filled with water. 11 of 13.

Red food dye settling into a vase filled with water.

Red food dye completely settled into a vase filled with water. 13 of 13.

Yellow and blue food dye settling into a vase filled with water. 1 of 11.

Yellow and blue food dye, in a vase filled with water, starting to mix to make green. 2 of 11.

Yellow and blue food dye, in a vase filled with water, starting to mix to make green. 3 of 11.

Yellow and blue food dye, in a vase filled with water, starting to mix to make green. 4 of 11.