To study some informations on the morphogenesis and developmental process of the coronal suture in rats, the author performed daily oral administrations of semethylchlorotetracycline, a kind of tetracycline group, in the amount of 30mg/kg of body weight to the female rats from the 7th day of pregnaney to the time of delivery. Microscopic evaluation was undertaked on the fetal rats in the experimental group. The subject of this experiment were defined to the fetal rats of each group at 1st, 3rd, 7th and 14th day after birth. All these fetal rats were sacrificed and the heads were removed. All the tissue sections were fixed with 10% formalin, Bouin' and Carnoy' solution and then stained by Hematoxylin-Van Gieson stain, or Feulgen and Rossenbeck, Periodic acid Schiff, and prepared for alcian blue reaction. The results were as follows; 1. The directions of osteogenic fibers were arranged irregulary during first 3 days, but after the 7th day they tended to change radial dirdctions like control group. 2. The density of deep stained cells by Feulgen-Rossenbeck rection were shown less in the experimental group than that in the control group in first 3 days, but there was shown no significant difference between both groups after the 7th day. 3. PAS reaction in early stage was generally negative in the experimental group unlike as in the control group, but diffuse reaction was observed in the loose middle zone like as in the control geoup agter 14th day. 4. Alcian blue reaction was negative in cambial zone, and slightly positive in uniting zone compared with control group in early stage. After 14th day, however, there was observed a tendency of moderately positive reaction.
Administration, Oral ; Alcian Blue ; Animals ; Body Weight ; Female ; Formaldehyde ; Head ; Humans ; Morphogenesis ; Parturition ; Periodic Acid ; Periodic Acid-Schiff Reaction ; Rats* ; Sutures* ; Tetracycline

Hidroacanthoma simplex (HS) is a rare benign intraepidermal tumor thought to originate from the intraepidermal eccrine duct. Many authors regard it as an intraepidermal form of eccrine poroma but there is still a discussion as to the histogenesis of HS. Clinically, it is more common in older adults and affects both sexes equally. It is found more often on the lower extremities and trunk. The clinical appearance is not characteristic, but the lesions are usually flat or slightly elevated verrucous brown plaques. Histopathologically, the tumor shows characteristic intraepidermal nests and is one of a number of cutaneous lesions showing Borst-Jadasshon phenomenon, that is, tendency to form nests within the epidermis. The tumor cells composing nests show a uniform cuboidal appearance and a round, deeply basophilic nucleus typically. The cytoplasm of tumor cell gives a positive PAS reaction that is diastase-labile. We report herein three cases of HS with the results of immunohistochemical studies.
Adult ; Basophils ; Cytoplasm ; Epidermis ; Humans ; Lower Extremity ; Periodic Acid-Schiff Reaction ; Poroma

Psoriasis is merely recognized as a disorder associated with pruritus. But in some cases, psoriasis does induce pruritus which could alter the daily lives of the people affected. Pruritus in psoriasis has been reported to be influenced by various external and internal factors and as a consequence, aggravation of psoriasis is possible by scratching due to the well-known Koebners phenomenen. Lichen amyloidosis, on the other hand, appears as multiple papules with intense pruritus. Recently, there are some evidence emphasizing pruritus as a main factor in forming amyloid deposits. We report a case of 65-year-old lady who was suffering psoriasis for 25 years with associated pruritic papular lesions on both of her thighs, knees and ankles. The diagnosis of Lichen amyloidosis was confirmed by Periodic Acid Schiff and Dylon stain. We discuss the role of pruritus in lichen amyloidosis and psoriasis and speculate that pruritus induced by lichen amyloidosis may induce a vicious cycle in aggravating psoriasis.
Aged ; Amyloidosis* ; Ankle ; Diagnosis ; Hand ; Humans ; Knee ; Lichens* ; Periodic Acid ; Plaque, Amyloid ; Pruritus ; Psoriasis ; Thigh

Changes in the thickness and composition of Bruch's membrane with aging have been described by several observers and related to the development of macular with advancing ageby region, comparing the macular area with more peripheral areas. In the younger (less than. 50 years) eyes we studied, the thickness of macular Bruch's membrane was about equal to that of peripheral Bruch's membrane. With aging, however, the thickness of Bruch's membrane was greater in the periphery than the macula. With increasing age, Bruch's membrane increased in basophilic reaction, PAS positivity and the detectable sialomucin fraction. In the macular region, but not in more peripheral regions, there is a preferential thickening of the interchoriocapillaris "teeth" of Bruch's degeneration by some. Using a combination of histochemical and electronmicroscopic techniques, we have examined the state of Bruch's membrane membrane material. By electronmicroscopy, in older eyes, the elastin layer of Bruch's membrane appears fragmented, while, in the periphery, it is continuous and resembles that of younger eyes. In summary, Bruch's membrane exhibits little regional difference in thickness in younger eyes, but the macular region becomes relatively thinner than more peripheral regions in older eyes. With advancing age, the deposition of extracellular matrix materials in appatite and fragmentation of the elastin layer is dramatically more prominent in the macular region than in the periphery. This regional variation may be related, at least in part, to some aspects of macular degeneration.
Aging ; Basophils ; Bruch Membrane* ; Elastin ; Extracellular Matrix ; Humans* ; Macular Degeneration ; Membranes ; Periodic Acid-Schiff Reaction ; Sialomucins

Adult Clonorchis sinensis from infected human cases may have black pigment in their parenchyme. In present paper, the nature of the pigment was investigated. The pigment distributed in cytoplasm of parenchymal cells of the worms. Histochemically the pigment was positive by periodic acid-Schiff, Ziehl-Neelsen, and lipofuscin stainings. The pigment particle contained many, various sized membrane structure as well as electron dense granules when observed by electron microscopy. Staining characteristics of the black pigment, together with electron microscopic findings, strongly indicated that the pigment was lipofuscin.
parasitology-helminth-trematoda ; Clonorchis sinensis ; lipofuscin ; electron microscopy ; periodic acid-Schiff ; Ziehl-Neelsen

OBJECTIVETo compare the performance of a modified PAS staining, traditional PAS staining, Lyon's PAS staining, and Tsunahico Watanabe staining for staining sections of renal biopsy tissue.

METHODSThe sections of the renal biopsy tissue were stained with the 4 methods and their staining performance was compared.

RESULTSThe modified PAS staining method produced a better contrast and a higher resolution and showed a greater stability after repeated use than the other 3 methods for staining the renal tissue sections (P<0.05).

CONCLUSIONThe modified PAS staining method shows a better applicability than the other 3 PAS methods for staining sections of renal biopsy tissue.

This study is designed to detect the emperipolesis in megakaryocyte in fetal liver, which is an important organ of hemopoiesis, during rat development, and to compare the activity of erythropoiesis in fetal liver with that of emperipolesis in megakaryocyte. In order to find that which causes are more related to emperipolesis, we applied periodic acid Schiff reagent, which is special staining method for megakaryocyte and used electron microscope. The size and maturity of magakaryocyte gradually developed with age. The number of megakaryocyte increased in similar proportion to the activity of erythropoiesis. Emperipolesis occurred in more mature megakaryocyte (most stage III). The majority of cells enclosed within megakaryocyte, were the precursor of erythrocytes. Emperipolesis was observed for the first time at 14 day of gestation. The highest frequency of emperipolesis showed 20% of whole megakaryocyte at 16 day of gestation, when the activity of erythropoiesis was most vigorous. The frequency of emperipolesis began to decrease after then, but megakaryocyte was most numerous at 17 day of gestation during fetal and neonatal period. At 19 day of gestation, stage IV megakaryocytes, just before the stage producing platelet, began to appear. Megakaryocyte was not observed after postnatal 10 day. In conclusion, it was found that the emperipolesis in megakaryocyte occurred in the rat fetal liver and was extreme the emperipolesis most observed at the time of most vigorous erythropoiesis during the development of rat fetal liver. It is suggested that the frequency of emperipolesis within megakaryocyte is more closely related with the activity of erythropoiesis in fetal liver than the that of megakaryocytopoiesis, before bone marrow acts as an important organ of hematopoiesis. It is also suggested that the emperipolesis contributes to the production of platelet during gestation period and the maturation of erythrocyte.
Animals ; Blood Platelets ; Bone Marrow ; Emperipolesis* ; Erythrocytes ; Erythropoiesis ; Hematopoiesis ; Liver ; Megakaryocytes* ; Periodic Acid ; Pregnancy ; Rats ; Thrombopoiesis

Objective: To investigate the clinicopathological characteristics of reactive epithelial hyperplasia and dysplasia in the stomach, as well as the clinical value of mucin special staining and proliferating cell nuclear antigen (Ki-67) in distinguishing the two gastric lesions. Methods: The clinical pathological data of 63 patients with gastric reactive epithelial hyperplasia, 54 patients with low-grade dysplasia, and 63 patients with high-grade dysplasia diagnosed from May 2018 to May 2021 in Beijing Chaoyang Hospital, Capital Medical University, Beijing, China were analyzed. Alcian blue periodic acid Schiff (AB-PAS) and Ki-67 staining were performed to examine the mucin staining pattern, number of Ki-67 positive cells, Ki-67 staining patterns in the three groups of lesions, and histopathologic characteristics. Results: The positive rates of AB-PAS in the reactive epithelial hyperplasia and gastric dysplasia groups were 87.3%(55/63) and 10.3%(12/117), respectively. The expression of AB-PAS in the reactive epithelial hyperplasia was gradually increased from the base to the surface of the epithelium. In low-grade dysplasia and high-grade dysplasia, there was no mucin present in the dysplasia epithelium. The difference between the two groups was statistically significant (P<0.01). The positive rate of Ki-67 in the epithelial reactive hyperplasia (>10%) was 81.0% (51/63), and the positive cells were mainly located in the neck and middle parts of the mucosal glands (58/63, 92.1%). In the low-grade dysplasia group, the positive rate of Ki-67 (>10%) was 90.7%(49/54); the positive cells were mainly located in the upper mucosa (33/54, 61.1%), showing a banded distribution pattern; in the high-grade dysplasia group, the positive rate (>10%) was 95.2%(60/63), and the positive cells were mainly located in the whole mucosa (49/63, 77.8%), showing a diffuse/diffuse scattered distribution pattern. The three groups had statistically different rates and distribution patterns of Ki-67 expression (P<0.01). Conclusion: The gastric epithelial reactive hyperplasia and dysplasia can be differentiated using clinicopathological features, AB-PAS staining and Ki-67 expression pattern.
Alcian Blue ; Humans ; Hyperplasia ; Ki-67 Antigen/metabolism* ; Periodic Acid ; Staining and Labeling ; Stomach Neoplasms/diagnosis*

Cutaneous mucormycosis is a rare disease caused by zygomycetes such as Rhizomucor, Mucor, Absidia, and Rhizopus. The disease usually occurs in immunocompromised individuals, and the organism is rarely pathogenic in an immunocompetent host. Herein, we report a 77-year-old female patient who had multiple erythematous papules and pustules on the left 3rd finger. She had received systemic steroid therapy prior to the occurrence of the skin lesions. The histopathological examination of Periodic Acid Schiff stained section showed chronic granulomatous inflammation and fungal hyphae. Rhizopus species was isolated on the fungal culture of the tissue specimen. The patient was finally diagnosed with cutaneous mucormycosis and was treated with itraconazole.
Absidia ; Aged ; Female ; Fingers ; Humans ; Hyphae ; Inflammation ; Itraconazole ; Mucor ; Mucormycosis* ; Periodic Acid ; Rare Diseases ; Rhizomucor ; Rhizopus ; Skin

Confluent and reticulated papillomatosis (CRP) was first described as a relatively rare dermatosis. CRP is characterized by slightly hyperkeratotic pigmented papules that are confluent in the center and reticulated at the periphery, located on the neck, abdomen, intermammary, and interscapular regions. Histopathologically, lesions typically reveal orthohyperkeratosis, papillomatosis, and focal acanthosis. A 20-year-old man presented with a 2-year history of slightly pruritic lesions on the chest, abdomen, back, and upper extremities. The lesions were brownish papules and plaques in a reticulated and coalescing pattern. Histologically, a basket-weave pattern of orthohyperkeratosis and mild acanthosis were seen. However, there was no significant papillomatosis, even in multiple sections. Periodic acid Schiff stain was negative for fungi. The patient was treated with doxycycline, 200 mg daily, for 4 weeks. The lesions completely resolved and did not recur during 12 months of follow-up. We report a rare case of CRP without papillomatosis.
Abdomen ; Doxycycline ; Follow-Up Studies ; Fungi ; Humans ; Neck ; Papilloma ; Periodic Acid ; Skin Diseases ; Thorax ; Upper Extremity ; Young Adult